Suspicious FatalRAT C2 HTTP Initial Submission Request (via proxy)

ATT&CK techniques

C2

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1071.001Web Protocols
Exfiltration
Impact

What it detects

This rule detects the FatalRAT command-and-control check-in, an HTTP GET to the initialsubmission path carrying windows_version and computer_name query parameters. This beacon pattern was observed in Operation SalmonSlalom against Chinese-speaking APAC targets. Detecting the structured check-in URI exposes active C2 communication from an infected host.

Reporting behind it

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Suspicious FatalRAT C2 HTTP Initial Submission Request (via proxy)

Pivot detection · T1071.001 · 9 related

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

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