TA0002 · EXECUTION
Systemd Timers
Adversaries may abuse systemd timers to perform task scheduling for initial or recurring execution of malicious code. Systemd timers are unit files with file extension .timer that control services.
Detect it with
Systemd timer unit files may be detected by auditing file creation and modification events within the /etc/systemd/system , /usr/lib/systemd/system/ , and ~/.config/systemd/user/ directories, as well as associated symbolic links.
Why it matters on shift
Systemd Timers is one of the concrete ways adversaries achieve execution. 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 execution, the next tactic is usually Persistence. Search your telemetry for the transition before closing the ticket.
Kill-chain context