283. That's How Ransomware Gangs Abuse Wbadmin

Hello everyone!

Today we'll look at an example of Inhibit System Recovery (T1490), and how adversaries abuse wbadmin. And no, not for deleting shadow copies.

Let's look at Chaos ransomware behaviors. It uses vssadmin and wmic to remove shadow copies, bcdedit to change recovery settings, and wbadmin to delete the backup catalog:

wbadmin delete catalog -quiet

Of course, you can look for such suspicious activity:

event_type: "processcreatewin"

AND

proc_file_path: "wbadmin.exe"

AND

cmdline: ("delete" AND "catalog")

See you tomorrow!

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