Suspicious Process Argv0 Masquerade As Kernel Worker via GSOCKET

PremiumReviewedSigma · Medium · v1
Product
linux
Category
process_creation
Author
HuntRule
Published
2026-07-28
Updated
2026-08-28

ATT&CK techniques

Defense Evasion
  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 detects a process launched with an argv0 spoofed to resemble a kernel worker thread such as a bracketed raid5wq name which the GSOCKET tooling uses to hide its reverse connectivity on Linux hosts. Adversaries masquerade as kernel threads to blend into process listings and evade casual inspection.

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