Schneier - FBI Deletes PlugX Malware from Thousands of Computers

According to a DOJ press release, the FBI was able to delete the Chinese-used PlugX malware from “approximately 4,258 U.S.-based computers and networks.”

Details:

To retrieve information from and send commands to the hacked machines, the malware connects to a command-and-control server that is operated by the hacking group. According to the FBI, at least 45,000 IP addresses in the US had back-and-forths with the command-and-control server since September 2023.

It was that very server that allowed the FBI to finally kill this pesky bit of malicious software. First, they tapped the know-how of French intelligence agencies, which had recently discovered a technique for getting PlugX to self-destruct. Then, the FBI gained access to the hackers’ command-and-control server and used it to request all the IP addresses of machines that were actively infected by PlugX. Then it sent a command via the server that causes PlugX to delete itself from its victims’ computers.



from Schneier on Security https://www.schneier.com/blog/archives/2025/01/fbi-deletes-plugx-malware-from-thousands-of-computers.html

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