IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
New Systemd Timer Creatededit
Detects the creation of a systemd timer within any of the default systemd timer directories. Systemd timers can be used by an attacker to gain persistence, by scheduling the execution of a command or script. Similarly to cron/at, systemd timers can be set up to execute on boot time, or on a specific point in time, which allows attackers to regain access in case the connection to the infected asset was lost.
Rule type: new_terms
Rule indices:
- logs-endpoint.events.*
- endgame-*
Severity: low
Risk score: 21
Runs every: 5m
Searches indices from: now-9m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Host
- Linux
- Threat Detection
- Persistence
- Elastic Endgame
Version: 1
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule queryedit
host.os.type : "linux" and event.action : ("creation" or "file_create_event") and file.extension : "timer" and
file.path : (/etc/systemd/system/* or /usr/local/lib/systemd/system/* or /lib/systemd/system/* or
/usr/lib/systemd/system/* or /home/*/.config/systemd/user/*) and not
process.executable : ("/usr/bin/dpkg" or "/usr/bin/dockerd" or "/bin/rpm")
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Persistence
- ID: TA0003
- Reference URL: https://attack.mitre.org/tactics/TA0003/
-
Technique:
- Name: Scheduled Task/Job
- ID: T1053
- Reference URL: https://attack.mitre.org/techniques/T1053/
-
Sub-technique:
- Name: Systemd Timers
- ID: T1053.006
- Reference URL: https://attack.mitre.org/techniques/T1053/006/