NTLMRawUnHide – Parse Network Packet Capture Files

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NTLMRawUnhide.py is a Python3 script designed to parse network packet capture files and extract NTLMv2 hashes in a crackable format. The tool was developed to extract NTLMv2 hashes from files generated by native Windows binaries like NETSH.EXE and PKTMON.EXE without conversion.

The following binary network packet capture formats are supported:

• *.pcap
• *.pcapng
• *.cap
• *.etl

Usage

Usage: NTLMRawUnhide.py -i <inputfile> [-o <outputfile>] [-f] [-h] [-q] [-v]

Main options:
  -f, --follow               Continuously "follow" (e.g. "read from")
                             input file for new data
  -h, --help
  -i, --input  <inputfile>   Binary packet data input file
                             (.pcap, .pcapng, .cap, .etl, others?)
  -o, --output <outputfile>  Output file to record any found NTLM
                             hashes
  -q, --quiet                Be a lot more quiet and only output
                             found NTLM hashes. --quiet will also
                             disable verbose, if specified.
  -v, --verbose

Examples

Extract NTLMv2 hashes from examples/capture.pcap:

python3 NTLMRawUnhide.py -i examples/capture.pcap

Same, but with verbose output:

python3 NTLMRawUnhide.py -i examples/capture.pcap -v

Extract NTLMv2 hashes from examples/capture.pcap and continue to monitor the file for new hashes (like tail -f):

python3 NTLMRawUnhide.py -i examples/capture.pcap -f

Extract NTLMv2 hashes from examples/capture.pcap and write extracted hashes to /tmp/hashes.txt

python3 NTLMRawUnhide.py -i examples/capture.pcap -o /tmp/hashes.txt

Packet Capture Methods

To create a compatible packet capture file, any of the following methods can be used:

• Wireshark:

Set capture filter as "tcp port 445"; Save as .pcapng

• tcpdump

tcpdump -i eth0 -w capture.pcap "port 445"

• NETSH.EXE

netsh.exe trace start persistent=yes capture=yes TCP.AnyPort=445 tracefile=C:UsersPubliccapture.etl
netsh.exe trace stop

• PKTMON.EXE

pktmon.exe filter add SMB -p 445
:: List all filters 
pktmon.exe filter list
:: Find id of the network adapter (example > Id: 9)
pktmon.exe comp list
:: pktmon.exe start --etw -p 0 -c [Adapter ID]     
pktmon.exe start --etw -p 0 -c 9 
:: Will create the file PktMon.etl in current directory
pktmon.exe stop
:: Cleanup
pktmon.exe filter remove

References

The following URL was very helpful when building this tool: The NTLM Authentication Protocol and Security Support Provider http://davenport.sourceforge.net/ntlm.html

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