pyJA3

JA3 provides fingerprinting services on SSL packets. This is a python wrapper around JA3 logic in order to produce valid JA3 fingerprints from an input PCAP file.

Getting Started

1. Install the pyja3 module:

   pip install pyja3 or python setup.py install

2. Test with a PCAP file or download a sample:

   $(venv) ja3 --json /your/file.pcap

Example

Output from sample PCAP:

[
    {
        "destination_ip": "192.168.1.3",
        "destination_port": 443,
        "ja3": "769,255-49162-49172-136-135-57-56-49167-49157-132-53-49159-49161-49169-49171-69-68-51-50-49164-49166-49154-49156-150-65-4-5-47-49160-49170-22-19-49165-49155-65279-10,0-10-11-35,23-24-25,0",
        "ja3_digest": "2aef69b4ba1938c3a400de4188743185",
        "source_ip": "192.168.1.4",
        "source_port": 2061,
        "timestamp": 1350802591.754299
    },
    {
        "destination_ip": "192.168.1.3",
        "destination_port": 443,
        "ja3": "769,255-49162-49172-136-135-57-56-49167-49157-132-53-49159-49161-49169-49171-69-68-51-50-49164-49166-49154-49156-150-65-4-5-47-49160-49170-22-19-49165-49155-65279-10,0-10-11-35,23-24-25,0",
        "ja3_digest": "2aef69b4ba1938c3a400de4188743185",
        "source_ip": "192.168.1.4",
        "source_port": 2068,
        "timestamp": 1350802597.517011
    }
]

Changelog

2018-02-05

• Change: Ported single script to valid Python Package
• Change: Re-factored code to be cleaner and PEP8 compliant
• Change: Supported Python2 and Python3