Suspicious Udev Rule Reload After Rules Directory Modification

ATT&CK techniques

Persistence → Priv Esc

Recon
Resource Dev
Initial Access
Execution
Persistence
- T1547Boot or Logon Autostart Execution
Priv Esc
- T1547Boot or Logon Autostart Execution
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects udevadm being invoked to reload or trigger device manager rules which follows an attacker writing a malicious rule into the udev rules directory to gain event driven persistence. Adversaries register a udev rule that runs a payload when a device event fires giving them privileged execution outside standard autostart locations.

Reporting behind it

Related detections9 linkedT1547 — drag to rearrange

Malicious TELEPUZ DLL Persistence via Masqueraded Loader in User Path

Suspicious Boot Verification Program Persistence via Registry (via registry_set)

SwimSnake Driver Execution Persistence via Session Manager PlatformExecute (via registry_set)

Suspicious Session Manager Execute Value Modification for Persistence (via registry_set)

Suspicious RDP Wds StartupPrograms Persistence Modification (via registry_set)

Windows: GPO Modification Adds Startup/Logon Script References

Windows Explorer ZIP Extraction Dropping Startup Folder Shortcut

Windows grpconv Utility Execution with Output Option

Windows: Suspicious Driver Installation via pnputil.exe

Suspicious Udev Rule Reload After Rules Directory Modification

Pivot detection · T1547 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

Full detection rule

Unlock this rule to view and copy it

The detection logic is included with a plan. Everything else — context, mappings and implementation details — stays free on this page.

Sign in for 3 free unlocks

Signing in gives you 3 unlocks to spend on any rule in the library. No card, and they do not expire.

Also included

Unlocked rules convert on this page — to Splunk SPL or Splunk — Raw Index SPL or Microsoft Sentinel KQL or Microsoft Sentinel ASIM ASIM KQL or Microsoft Defender XDR KQL or Elastic Security KQL or Elastic Security Lucene or Elastic Security ES|QL or CrowdStrike Falcon CQL or SentinelOne PowerQuery or Palo Alto Cortex XDR XQL or Carbon Black Cloud Platform Search or Carbon Black EDR Process Search or Google Security Operations UDM Search or IBM QRadar AQL or Sumo Logic Cloud SIEM Rules expression or Rapid7 InsightIDR LEQL or Graylog Search or OpenSearch Lucene or OpenSearch PPL PPL or Grafana Loki LogQL or SQLite SQL or Zircolite SQLite — with the log-source profile the engine picked, the field map it used, and everything it could not express. Converting a rule you have unlocked costs no further credit.

See it run on a free rule →Convert your own rule →