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Malcolm
Malcolm is a powerful, easily deployable network traffic analysis tool suite for full packet capture artifacts (PCAP files), Zeek logs and Suricata alerts. (by idaholab)
Malcolm reviews and mentions
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Kali Linux 2023.1 introduces 'Purple' distro for defensive security
The heavy lifting of this is CISA's Malcom [1]. Unfortunately the blog posts only provides a non-linked bullet to it [2]. Seth Grover, the main driver behind Malcom, put a lot of effort over the years into creating a turnkey soc-in-a-box distro that works especially well for an network-first approach. Endpoint isn't neglected, but the focus on Zeek, Suricata, Arkime shows the primary visibility drivers. This is not surprising, because CISA also developed a bunch of custom ICS protocol dissectors that provide visibility (DNP3, Modbus, etc.). The list is impressive [3]. All of this is turnkey available by running Malcom. Especially for OT, where we have a lot more unmanaged black boxes and networks that you don't wanna actively scan (factories have been brought down this way), passively watching is a safe and powerful approach.
It's a bit unfortunate that Kali didn't give the props to Seth's project (not even an outbound link). Perhaps this was just an oversight, or a spotlight blog post is coming later, but I hope that the history of this gets properly acknowledged, because it's darn clear where this comes from.
[1]: https://github.com/cisagov/Malcolm
[2]: https://www.kali.org/blog/kali-linux-2023-1-release/
[3]: https://cisagov.github.io/Malcolm/docs/protocols.html
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Tool recommendation needed: Network analyzer
Now on the higher end level, I have a laptop I used for packet capture and sniffing. Using a small network tap device, I can hook this inline anywhere one suspects a potential issue. Then use software of your choice to capture and analyze data over a few days. Two I use for this purpose, along with cyber threat analysis are NTOPNG and Malcolm, a very poweful free opensource platform made by a brilliant guy at CISA. Link to git repo here. https://github.com/cisagov/Malcolm
- Malcolm A network traffic analysis tool suite for full packet capture artifacts
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A note from our sponsor - InfluxDB
www.influxdata.com | 2 May 2024
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cisagov/Malcolm is an open source project licensed under GNU General Public License v3.0 or later which is an OSI approved license.
The primary programming language of Malcolm is Python.
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