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Changed the complete LDAP parsing hash algo (ntlmv2 bug).

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lgandx 2017-09-04 23:15:27 -03:00
commit 679cf65cff
1 changed files with 42 additions and 26 deletions
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68
servers/LDAP.py
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@ -27,37 +27,53 @@ def ParseSearch(data):
elif re.search(r'(?i)(objectClass0*.*supportedSASLMechanisms)', data):
return str(LDAPSearchSupportedMechanismsPacket(MessageIDASNStr=data[8:9],MessageIDASN2Str=data[8:9]))
def ParseLDAPHash(data, client, Challenge):
SSPIStart = data[42:]
LMhashLen = struct.unpack('<H',data[54:56])[0]
def ParseLDAPHash(data,client, Challenge): #Parse LDAP NTLMSSP v1/v2
SSPIStart = data.find('NTLMSSP')
SSPIString = data[SSPIStart:]
LMhashLen = struct.unpack('<H',data[SSPIStart+14:SSPIStart+16])[0]
LMhashOffset = struct.unpack('<H',data[SSPIStart+16:SSPIStart+18])[0]
LMHash = SSPIString[LMhashOffset:LMhashOffset+LMhashLen].encode("hex").upper()
NthashLen = struct.unpack('<H',data[SSPIStart+20:SSPIStart+22])[0]
NthashOffset = struct.unpack('<H',data[SSPIStart+24:SSPIStart+26])[0]
if LMhashLen > 10:
LMhashOffset = struct.unpack('<H',data[58:60])[0]
LMHash = SSPIStart[LMhashOffset:LMhashOffset+LMhashLen].encode("hex").upper()
NthashLen = struct.unpack('<H',data[64:66])[0]
NthashOffset = struct.unpack('<H',data[66:68])[0]
NtHash = SSPIStart[NthashOffset:NthashOffset+NthashLen].encode("hex").upper()
DomainLen = struct.unpack('<H',data[72:74])[0]
DomainOffset = struct.unpack('<H',data[74:76])[0]
Domain = SSPIStart[DomainOffset:DomainOffset+DomainLen].replace('\x00','')
UserLen = struct.unpack('<H',data[80:82])[0]
UserOffset = struct.unpack('<H',data[82:84])[0]
User = SSPIStart[UserOffset:UserOffset+UserLen].replace('\x00','')
WriteHash = User + "::" + Domain + ":" + LMHash + ":" + NtHash + ":" + Challenge.encode('hex')
if NthashLen == 24:
SMBHash = SSPIString[NthashOffset:NthashOffset+NthashLen].encode("hex").upper()
DomainLen = struct.unpack('<H',SSPIString[30:32])[0]
DomainOffset = struct.unpack('<H',SSPIString[32:34])[0]
Domain = SSPIString[DomainOffset:DomainOffset+DomainLen].decode('UTF-16LE')
UserLen = struct.unpack('<H',SSPIString[38:40])[0]
UserOffset = struct.unpack('<H',SSPIString[40:42])[0]
Username = SSPIString[UserOffset:UserOffset+UserLen].decode('UTF-16LE')
WriteHash = '%s::%s:%s:%s:%s' % (Username, Domain, LMHash, SMBHash, Challenge.encode('hex'))
SaveToDb({
'module': 'LDAP',
'type': 'NTLMv1',
'client': client,
'user': Domain+'\\'+User,
'hash': NtHash,
'module': 'LDAP',
'type': 'NTLMv1-SSP',
'client': client,
'user': Domain+'\\'+Username,
'hash': SMBHash,
'fullhash': WriteHash,
})
if NthashLen > 60:
SMBHash = SSPIString[NthashOffset:NthashOffset+NthashLen].encode("hex").upper()
DomainLen = struct.unpack('<H',SSPIString[30:32])[0]
DomainOffset = struct.unpack('<H',SSPIString[32:34])[0]
Domain = SSPIString[DomainOffset:DomainOffset+DomainLen].decode('UTF-16LE')
UserLen = struct.unpack('<H',SSPIString[38:40])[0]
UserOffset = struct.unpack('<H',SSPIString[40:42])[0]
Username = SSPIString[UserOffset:UserOffset+UserLen].decode('UTF-16LE')
WriteHash = '%s::%s:%s:%s:%s' % (Username, Domain, Challenge.encode('hex'), SMBHash[:32], SMBHash[32:])
SaveToDb({
'module': 'LDAP',
'type': 'NTLMv2',
'client': client,
'user': Domain+'\\'+Username,
'hash': SMBHash,
'fullhash': WriteHash,
})
if LMhashLen < 2 and settings.Config.Verbose:
print text("[LDAP] Ignoring anonymous NTLM authentication")