Suspicious Credential Search via findstr for Password Strings (via process_creation)

PremiumReviewedSigma · Medium · v1
Product
windows
Category
process_creation
Author
HuntRule
Published
2026-06-15
Updated
2026-08-28

ATT&CK techniques

Cred Access
  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Persistence

  6. Priv Esc

  7. Defense Evasion

  8. Discovery

  9. Lateral Movement

  10. Collection

  11. C2

  12. Exfiltration

  13. Impact

What it detects

This rule detects findstr executed to search files for the keyword password. The Lumma infostealer uses findstr to locate plaintext credentials stored in local files, harvesting secrets for exfiltration and follow-on account compromise.

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Suspicious Credential Search via findstr for Password Strings (via process_creation)
Pivot detection · T1552.001 · 9 related

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