huntrule

Suspicious PG_MEM Payload Drop in PostgreSQL Data Directory (via file_event)

PremiumReviewedSigma · High · v1
Product
linux
Category
file_event
Author
HuntRule
Published
2026-06-05
Updated
2026-08-28
AnalysisDetection

ATT&CK techniques

C2

  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 the PG_MEM malware writing its pg_core loader and pg_mem payload into the PostgreSQL data directory after gaining code execution through the database. Executables written under the postgres data directory are highly abnormal and indicate compromise.

Reporting behind it

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Suspicious PG_MEM Payload Drop in PostgreSQL Data Directory (via file_event)
Pivot detection · T1105 · 9 related

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