Possible Cobalt Strike Beacon URI Pattern via Web C2

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
- T1090.004Domain Fronting
Exfiltration
Impact

What it detects

This rule detects outbound HTTP requests to Cobalt Strike malleable profile URIs observed in Blister post-exploitation traffic, including the /safebrowsing/ and /rest/2/meetings beacon paths often paired with Fastly domain fronting. These structured C2 URIs indicate beaconing to an attacker-controlled team server masquerading as benign web services.

Reporting behind it

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Possible Cobalt Strike Beacon URI Pattern via Web C2

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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