Suspicious Peach Sandstorm Password Spray via go-http-client User Agent (via proxy)

PremiumReviewedSigma · Medium · v1
Category
proxy
Author
HuntRule
Published
2026-07-20
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 inbound authentication traffic carrying the default Go HTTP library user agent go-http-client. Peach Sandstorm used this user agent while conducting password spray attacks against enterprise sign-in endpoints for initial access.

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Suspicious Peach Sandstorm Password Spray via go-http-client User Agent (via proxy)
Pivot detection · T1110.003 · 7 related

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