private NetworkLayerObject GetKerberosTicketsHash(string source, string destination, byte[] data)
{
var kerberosPacket = KerberosPacketParser.GetKerberosPacket(data);
if (kerberosPacket is null)
{
return(null);
}
if (kerberosPacket is KerberosTgsRepPacket)
{
var kerberosTgsRepPacket = kerberosPacket as KerberosTgsRepPacket;
if (kerberosTgsRepPacket.Ticket.EncrytedPart.Etype == 23)
{
return(new KerberosTgsRepHash()
{
Source = source,
Destination = destination,
Realm = kerberosTgsRepPacket.Ticket.Realm,
Etype = 23,
Username = kerberosTgsRepPacket.Cname.Name,
ServiceName = kerberosTgsRepPacket.Ticket.Sname.Name,
Hash = NtlmsspHashParser.ByteArrayToHexString(kerberosTgsRepPacket.Ticket.EncrytedPart.Cipher),
Protocol = "UDP",
HashType = "Kerberos TGS Rep Etype 23"
});
}
}
return(null);
}
private NetworkLayerObject GetKerberosTicketsHash(string source, string destination, string protocol, byte[] data)
{
var kerberosPacket = KerberosPacketParser.GetKerberosPacket(data);
if (kerberosPacket is null)
{
return(null);
}
// TODO: refactor this boilerplate code
if (kerberosPacket is KerberosTgsRepPacket)
{
var kerberosTgsRepPacket = kerberosPacket as KerberosTgsRepPacket;
if (kerberosTgsRepPacket.Ticket.EncrytedPart.Etype == 23)
{
return(new KerberosTgsRepHash()
{
Source = source,
Destination = destination,
Realm = kerberosTgsRepPacket.Ticket.Realm,
Etype = 23,
Username = kerberosTgsRepPacket.Cname.Name,
ServiceName = kerberosTgsRepPacket.Ticket.Sname.Name,
Hash = NtlmsspHashParser.ByteArrayToHexString(kerberosTgsRepPacket.Ticket.EncrytedPart.Cipher),
Protocol = protocol,
HashType = "Kerberos V5 TGS-REP etype 23"
});
}
}
else if (kerberosPacket is KerberosAsRepPacket)
{
var kerberosAsRepPacket = kerberosPacket as KerberosAsRepPacket;
if (kerberosAsRepPacket.Ticket.EncrytedPart.Etype == 23)
{
return(new KerberosAsRepHash()
{
Source = source,
Destination = destination,
Realm = kerberosAsRepPacket.Ticket.Realm,
Etype = 23,
Username = kerberosAsRepPacket.Cname.Name,
ServiceName = kerberosAsRepPacket.Ticket.Sname.Name,
Hash = NtlmsspHashParser.ByteArrayToHexString(kerberosAsRepPacket.Ticket.EncrytedPart.Cipher),
Protocol = protocol,
HashType = "Kerberos V5 AS-REP etype 23"
});
}
}
return(null);
}
private NetworkLayerObject GetKerberosTicketsHash(string source, string destination, string protocol, byte[] data)
{
var kerberosPacket = KerberosPacketParser.GetKerberosPacket(data, protocol);
if (kerberosPacket is null)
{
return(null);
}
// TODO: use enum for hashes types
if (kerberosPacket is KerberosTgsRepPacket)
{
var kerberosTgsRepPacket = kerberosPacket as KerberosTgsRepPacket;
if (kerberosTgsRepPacket.Ticket.EncrytedPart.Etype == 23 || kerberosTgsRepPacket.Ticket.EncrytedPart.Etype == 18 || kerberosTgsRepPacket.Ticket.EncrytedPart.Etype == 17)
{
return(new KerberosTgsRepHash()
{
Source = source,
Destination = destination,
Realm = kerberosTgsRepPacket.Ticket.Realm,
Etype = kerberosTgsRepPacket.Ticket.EncrytedPart.Etype,
Username = kerberosTgsRepPacket.Cname.Name,
ServiceName = kerberosTgsRepPacket.Ticket.Sname.Name,
Hash = NtlmsspHashParser.ByteArrayToHexString(kerberosTgsRepPacket.Ticket.EncrytedPart.Cipher),
Protocol = protocol,
HashType = $"Kerberos V5 TGS-REP etype {kerberosTgsRepPacket.Ticket.EncrytedPart.Etype}"
});
}
}
else if (kerberosPacket is KerberosAsRepPacket)
{
var kerberosAsRepPacket = kerberosPacket as KerberosAsRepPacket;
if (kerberosAsRepPacket.Ticket.EncrytedPart.Etype == 23 || kerberosAsRepPacket.Ticket.EncrytedPart.Etype == 18)
{
return(new KerberosAsRepHash()
{
Source = source,
Destination = destination,
Realm = kerberosAsRepPacket.Ticket.Realm,
Etype = kerberosAsRepPacket.Ticket.EncrytedPart.Etype,
Username = kerberosAsRepPacket.Cname.Name,
ServiceName = kerberosAsRepPacket.Ticket.Sname.Name,
Hash = NtlmsspHashParser.ByteArrayToHexString(kerberosAsRepPacket.Ticket.EncrytedPart.Cipher),
Protocol = protocol,
HashType = $"Kerberos V5 AS-REP etype {kerberosAsRepPacket.Ticket.EncrytedPart.Etype}"
});
}
}
return(null);
}
private readonly byte[] pa_data_signiture2 = new byte[] { 0xa2, 0x35, 0x04, 0x33 }; // Hash length = 0x35 = 53
public NetworkLayerObject Parse(UdpPacket udpPacket)
{
if (!isKerberos(udpPacket))
{
return(null);
}
byte[] sig_part = udpPacket.Data.SubArray(40, 4);
if (Utilities.SearchForSubarray(sig_part, this.pa_data_signiture) == 0 ||
Utilities.SearchForSubarray(sig_part, this.pa_data_signiture2) == 0)
{
var paddingLen = 0;
var hashOffset = 44;
var userNameOffset = 144;
var hashItemLen = (int)udpPacket.Data[41];
if (hashItemLen == 53)
{
paddingLen = 1;
}
if (hashItemLen != 54 && hashItemLen != 53)
{
hashItemLen = (int)udpPacket.Data[48];
hashOffset = 49;
userNameOffset = hashItemLen + 97;
}
var hashLen = 52 - paddingLen;
byte[] hash = udpPacket.Data.SubArray(hashOffset, hashLen);
byte[] switchedHash = new byte[hashLen];
hash.SubArray(16, 36).CopyTo(switchedHash, 0);
hash.SubArray(0, 16).CopyTo(switchedHash, 36);
string hashString = NtlmsspHashParser.ByteArrayToHexString(switchedHash);
var userName = ExtractKerberosMessageItem(udpPacket.Data, userNameOffset - paddingLen, out int userNameLength);
string domain = ExtractKerberosMessageItem(udpPacket.Data, userNameOffset + userNameLength - paddingLen + 4, out int domainLength);
return(new KerberosHash()
{
HashType = "Kerberos V5 AS-REQ Pre-Auth etype 23",
Protocol = "UDP",
Source = udpPacket.DestinationIp,
Destination = udpPacket.SourceIp,
User = userName,
Domain = domain,
Hash = hashString
});
}
return(null);
}
public void NtlmPasswordParser_ParseSmbNTLMv2Session_ParseSuccess()
{
// Arrange
var ntlmParser = new PcapAnalyzer.NtlmsspHashParser();
var session = new PcapAnalyzer.TcpSession();
var serverPacket = new PcapAnalyzer.TcpPacket()
{
SourceIp = "2.2.2.2",
DestinationIp = "1.1.1.1",
Data = new byte[]
{
0x00, 0x00, 0x00, 0xf8, 0xfe, 0x53, 0x4d, 0x42, 0x40, 0x00, 0x00, 0x00, 0x16, 0x00, 0x00, 0xc0,
0x01, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0xd5, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3d, 0x00, 0x00, 0x94,
0x00, 0x48, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x00, 0x48, 0x00, 0xb0, 0x00, 0x4e, 0x54, 0x4c, 0x4d,
0x53, 0x53, 0x50, 0x00, 0x02, 0x00, 0x00, 0x00, 0x08, 0x00, 0x08, 0x00, 0x38, 0x00, 0x00, 0x00,
0x35, 0x02, 0x89, 0xe2, 0x01, 0x15, 0x18, 0x13, 0xd2, 0x89, 0x8c, 0xcd, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x70, 0x00, 0x70, 0x00, 0x40, 0x00, 0x00, 0x00, 0x0a, 0x00, 0x39, 0x38,
0x00, 0x00, 0x00, 0x0f, 0x53, 0x00, 0x55, 0x00, 0x53, 0x00, 0x45, 0x00, 0x02, 0x00, 0x08, 0x00,
0x53, 0x00, 0x55, 0x00, 0x53, 0x00, 0x45, 0x00, 0x01, 0x00, 0x0c, 0x00, 0x57, 0x00, 0x53, 0x00,
0x32, 0x00, 0x30, 0x00, 0x31, 0x00, 0x36, 0x00, 0x04, 0x00, 0x0e, 0x00, 0x73, 0x00, 0x75, 0x00,
0x73, 0x00, 0x65, 0x00, 0x2e, 0x00, 0x64, 0x00, 0x65, 0x00, 0x03, 0x00, 0x1c, 0x00, 0x57, 0x00,
0x53, 0x00, 0x32, 0x00, 0x30, 0x00, 0x31, 0x00, 0x36, 0x00, 0x2e, 0x00, 0x73, 0x00, 0x75, 0x00,
0x73, 0x00, 0x65, 0x00, 0x2e, 0x00, 0x64, 0x00, 0x65, 0x00, 0x05, 0x00, 0x0e, 0x00, 0x73, 0x00,
0x75, 0x00, 0x73, 0x00, 0x65, 0x00, 0x2e, 0x00, 0x64, 0x00, 0x65, 0x00, 0x07, 0x00, 0x08, 0x00,
0x8a, 0x8c, 0xe7, 0xa9, 0xf4, 0xce, 0xd2, 0x01, 0x00, 0x00, 0x00, 0x00
}
};
var clientPacket = new PcapAnalyzer.TcpPacket()
{
SourceIp = "1.1.1.1",
DestinationIp = "2.2.2.2",
Data = new byte[]
{
0x00, 0x00, 0x01, 0x68, 0xfe, 0x53, 0x4d, 0x42, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x01, 0x00, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0xd5, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3d, 0x00, 0x00, 0x94,
0x00, 0x48, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x19, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x58, 0x00, 0x10, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x4e, 0x54, 0x4c, 0x4d,
0x53, 0x53, 0x50, 0x00, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00,
0x9c, 0x00, 0x9c, 0x00, 0x40, 0x00, 0x00, 0x00, 0x08, 0x00, 0x08, 0x00, 0xdc, 0x00, 0x00, 0x00,
0x1a, 0x00, 0x1a, 0x00, 0xe4, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0x00, 0x00, 0x00,
0x10, 0x00, 0x10, 0x00, 0x00, 0x01, 0x00, 0x00, 0x35, 0x02, 0x88, 0xe0, 0x39, 0xdb, 0xdb, 0xeb,
0x1b, 0xdd, 0x29, 0xb0, 0x7a, 0x5d, 0x20, 0xc8, 0xf8, 0x2f, 0x2c, 0xb7, 0x01, 0x01, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x8a, 0x8c, 0xe7, 0xa9, 0xf4, 0xce, 0xd2, 0x01, 0xe7, 0x96, 0x9a, 0x04,
0x87, 0x2c, 0x16, 0x89, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x08, 0x00, 0x53, 0x00, 0x55, 0x00,
0x53, 0x00, 0x45, 0x00, 0x01, 0x00, 0x0c, 0x00, 0x57, 0x00, 0x53, 0x00, 0x32, 0x00, 0x30, 0x00,
0x31, 0x00, 0x36, 0x00, 0x04, 0x00, 0x0e, 0x00, 0x73, 0x00, 0x75, 0x00, 0x73, 0x00, 0x65, 0x00,
0x2e, 0x00, 0x64, 0x00, 0x65, 0x00, 0x03, 0x00, 0x1c, 0x00, 0x57, 0x00, 0x53, 0x00, 0x32, 0x00,
0x30, 0x00, 0x31, 0x00, 0x36, 0x00, 0x2e, 0x00, 0x73, 0x00, 0x75, 0x00, 0x73, 0x00, 0x65, 0x00,
0x2e, 0x00, 0x64, 0x00, 0x65, 0x00, 0x05, 0x00, 0x0e, 0x00, 0x73, 0x00, 0x75, 0x00, 0x73, 0x00,
0x65, 0x00, 0x2e, 0x00, 0x64, 0x00, 0x65, 0x00, 0x07, 0x00, 0x08, 0x00, 0x8a, 0x8c, 0xe7, 0xa9,
0xf4, 0xce, 0xd2, 0x01, 0x00, 0x00, 0x00, 0x00, 0x53, 0x00, 0x55, 0x00, 0x53, 0x00, 0x45, 0x00,
0x61, 0x00, 0x64, 0x00, 0x6d, 0x00, 0x69, 0x00, 0x6e, 0x00, 0x69, 0x00, 0x73, 0x00, 0x74, 0x00,
0x72, 0x00, 0x61, 0x00, 0x74, 0x00, 0x6f, 0x00, 0x72, 0x00, 0x00, 0x00, 0xb2, 0xe8, 0x76, 0x55,
0x9c, 0x9c, 0x58, 0xb0, 0x34, 0x4b, 0xd5, 0xa9, 0x9f, 0x8e, 0x98, 0x55
}
};
session.Packets.Add(serverPacket);
session.Packets.Add(clientPacket);
// Act.
var hash = ntlmParser.Parse(session) as PcapAnalyzer.NtlmHash;
// Assert.
Assert.AreEqual("NTLMSSP", hash.Protocol);
Assert.AreEqual("administrator", hash.User);
Assert.AreEqual("SUSE", hash.Domain);
Assert.AreEqual(hash.NtHash.Length, 312);
}