198. Ransomware Gangs Uninstall Two-Factor Authentication Apps

Hello everyone!

More and more organizations use multi-factor authentication. And threat actors don't like it! For example, ransomware gangs.

Let's look into Cisco Talos report. The adverary leveraged simple yet effective technique - just uninstalled Duo from the compromised host:

C:\WINDOWS\system32\cmd.EXE, /c, wmic, product, where, name=Duo Authentication for Windows Logon x64, call, uninstall, /nointeractive:

And yes, this is another interesting behavior to hunt for:

event_type: "processcreatewin"

AND

cmdline: ("duo authentication" AND "uninstall")

Of course, you can experiment with other two-factor authentication applications.

See you tomorrow!

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