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PTH Fix for Group Enumeration with SMB #563

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PTH Fix for Group Enumeration with SMB #563

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10 changes: 10 additions & 0 deletions nxc/connection.py
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Original file line number Diff line number Diff line change
Expand Up @@ -419,6 +419,14 @@ def parse_credentials(self):
else:
secret.append(password)
cred_type.append("plaintext")

# Some libraries will be confused by a bare NT hash - pad such a hash
# with a placeholder LM: prefix.
def pad_lm(ntlm_hash):
if len(ntlm_hash) == 32:
lm_hash = "aad3b435b51404eeaad3b435b51404ee"
ntlm_hash = lm_hash + ":" + ntlm_hash
return ntlm_hash

# Parse NTLM-hashes
if hasattr(self.args, "hash") and self.args.hash:
Expand All @@ -431,13 +439,15 @@ def parse_credentials(self):
self.logger.fail(f"Invalid NTLM hash length on line {(i + 1)} (len {len(line)}): {line}")
continue
else:
line = pad_lm(line)
secret.append(line)
cred_type.append("hash")
else:
if len(ntlm_hash) != 32 and len(ntlm_hash) != 65:
self.logger.fail(f"Invalid NTLM hash length {len(ntlm_hash)}, authentication not sent")
exit(1)
else:
ntlm_hash = pad_lm(ntlm_hash)
secret.append(ntlm_hash)
cred_type.append("hash")
self.logger.debug(secret)
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