Suspicious Non-Standard HTTP Methods Used for Covert C2 (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 HTTP requests using the non-standard verbs POT, DPF, UPF, CPF, and LPF employed by malware in a suspected China-based espionage operation to encode command and control operations. These invalid HTTP methods are not produced by legitimate clients, so their presence marks covert C2 signaling.

Reporting behind it

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Suspicious Non-Standard HTTP Methods Used for Covert C2 (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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