TA0003 · PERSISTENCE
Udev Rules
Adversaries may maintain persistence through executing malicious content triggered using udev rules.
Detect it with
Monitor file creation and modification of Udev rule files in /etc/udev/rules.d/, /lib/udev/rules.d/, and /usr/lib/udev/rules.d/, specifically the RUN action key commands.
Why it matters on shift
Udev Rules is one of the concrete ways adversaries achieve persistence. Recognising it in telemetry lets you name the technique in your ticket and pivot to what came before and after.
What to look for next
After persistence, the next tactic is usually Privilege Escalation. Search your telemetry for the transition before closing the ticket.
Kill-chain context