huntrule

Linux System & Hardware Information Discovery via File and Version Reads

Detects Linux file access to BIOS/DMI, hardware model, kernel, and OS release/issue identifiers used for system profiling.

FreeReviewedSigma · Informational · v3
Product
linux
Service
auditd
Author
Ömer Günal, oscd.community (SigmaHQ), DRL 1.1
Published
2020-10-08
Updated
2026-07-31
AnalysisDetection

ATT&CK techniques

Discovery

  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Persistence

  6. Priv Esc

  7. Defense Evasion

  8. Cred Access

  9. Discovery

  10. Lateral Movement

  11. Collection

  12. C2

  13. Exfiltration

  14. Impact

What it detects

This rule flags process activity that directly reads common Linux system and hardware identification files and version/release indicators. Attackers often use these artifacts to fingerprint the environment, tailor follow-on behavior, or decide whether specific software or hardware paths are present. It relies on Linux auditd telemetry that records the process path access events matching the specific file patterns listed.

Reporting behind it

Related detections9 linkedT1082 — drag to rearrange
Malicious Turla Kopiluwak Reconnaissance Output to Windows Temp via process_creation
Suspicious Windows Defender Support Directory Enumeration via Process Creation
Suspicious System Reconnaissance via Windows Script Host
Suspicious Host Reconnaissance Command Chain via cmd
Malicious DinodasRAT Hidden Config File Creation on Linux (via file_event)
Suspicious System Discovery via WMIC Query Commands (via process_creation)
Suspicious PowerShell Host and Locale Reconnaissance via MuddyWater Tsundere Botnet
Suspicious System Reconnaissance Output Redirected to Temp rad File
Suspicious System Profiler Hardware Reconnaissance via BANSHEE
Linux System & Hardware Information Discovery via File and Version Reads
Pivot detection · T1082 · 9 related

Changelog

v3
  1. v3
    Candidate ingested via manual entry.2026-07-31
  2. v2
    Candidate ingested via manual entry.2026-07-31
  3. v1
    No changelog recorded for this version.2026-07-30

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