Malicious VoidLink Rootkit Dropper Artifacts via Filesystem (via file_event)

ATT&CK techniques

Defense Evasion

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
- T1014Rootkit
- T1027Obfuscated Files or Information
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects the creation of VoidLink dropper artifacts prefixed with vl in temporary and shared memory directories on Linux hosts. The VoidLink rootkit stages its components as hidden vl_ files under /tmp and /dev/shm before loading its kernel module. Files matching this naming pattern indicate rootkit staging activity.

Reporting behind it

Related detections9 linkedT1027 — drag to rearrange

Malicious Non-Interactive Encoded PowerShell Stager (via process_creation)

Malicious Koske Userland Rootkit Installation via ld.so.preload (via file_event)

Malicious TeamTNT prochider Rootkit Deployment as Shared Object (via file_event)

Malicious perfctl Rootkit Library Drop via ld.so.preload (via file_event)

Suspicious Hidden PowerShell Executing Substring of Dropped File

PowerShell Encoded or Download-Cradle Command Line (via process_creation)

Obfuscated Encoded PowerShell Payload Deployed via Process Execution (via process_creation)

Obfuscated Encoded PowerShell Payload Deployed - PowerShell (via powershell)

Malicious KB Document Masqueraded Executable Spawned by Script Interpreter via RoKRAT Loader (via process_creation)

Malicious VoidLink Rootkit Dropper Artifacts via Filesystem (via file_event)

Pivot detection · T1027 · 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 →