huntrule

Suspicious Container Environment Discovery via Proc Cgroup

PremiumReviewedSigma · Medium · v1
Product
linux
Category
process_creation
Author
HuntRule
Published
2026-10-29
Updated
2026-10-29
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 detects reads of the init process cgroup entry combined with Docker socket probing, the container-awareness discovery JADEPUFFER performs before deciding how to spread and extort. The actor inspects cgroup membership to determine whether it runs inside a container. This reconnaissance precedes container escape and ransomware deployment.

Reporting behind it

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Suspicious Container Environment Discovery via Proc Cgroup
Pivot detection · T1057 · 9 related

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