Suspicious Go HTTP Client User Agent via Proxy
- Category
- proxy
- Author
- HuntRule
- Published
- 2026-08-05
- Updated
- 2026-08-28
ATT&CK techniques
Cred AccessRecon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule detects outbound web requests carrying the default Go HTTP client user agent, which Peach Sandstorm used from Azure infrastructure during password spray attacks against target tenants. The user agent is a weak but useful signal that can highlight automated credential-guessing traffic when correlated with failed authentication.
Reporting behind it
Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.
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