Suspicious File Search for Passwords via Findstr (via process_creation)

PremiumReviewedSigma · Medium · v1
Product
windows
Category
process_creation
Author
HuntRule
Published
2026-06-29
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 being used to search files recursively for the string password, an unsecured-credentials technique for locating secrets in configuration files and scripts. Searching files for passwords is tracked in the Red Canary Threat Detection Report. Detecting these searches surfaces credential hunting across the file system.

Related detections9 linkedT1552.001 — drag to rearrange
Suspicious Access to Cloud and Database Credential Files via Process
Suspicious Credential Exfiltration to webhook.site (via dns_query)
Suspicious Shai-Hulud Worm Stager Execution from Temp (via process_creation)
Suspicious prt-scan Campaign Credential Harvesting via proc environ Scan (via process_creation)
Possible Stolen AWS Credential Validation via STS GetCallerIdentity
Suspicious Double Base64 Decoded Payload Piped to Shell in CI (reviewdog Supply Chain)
Malicious Winlogon Automatic Logon Persistence via Registry AutoAdminLogon (via process_creation)
Suspicious RegAsm MSBuild or AutoIt Accessing Browser Credential Stores
Suspicious Credential File Harvesting of NPM Claude and SSH Secrets
Suspicious File Search for Passwords via Findstr (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.