Suspicious SD-WAN Compromise Nim Implant C2 Beacon

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 to the Nim implant endpoints observed in the ongoing Cisco Catalyst SD-WAN exploitation, where the backdoor uses fixed URI paths for handshake and exfiltration. The dedicated /api/v1/handshake and /exfiltrate routes reveal the implant control channel used after webshell deployment. Matching traffic indicates an active Nim implant beaconing from a compromised appliance.

Reporting behind it

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Malicious Splinter Post-Exploitation Implant C2 URI Pattern (via proxy)

Suspicious SD-WAN Compromise Nim Implant C2 Beacon

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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