Malicious NANOREMOTE C2 Beacon by User-Agent

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 outbound HTTP traffic carrying the NanoRemote User-Agent string used by the NANOREMOTE backdoor when beaconing to its command-and-control server. The hardcoded agent value combined with the /api/client request path is a distinctive fingerprint of this implant.

Reporting behind it

Related detections9 linkedT1071.001 — drag to rearrange

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Suspicious Network Connection from fsutil or Defender Client via network_connection

Suspicious Data Exfiltration Channel to Telegram or Discord via dns_query

Malicious C2 Domain Beacon To Akamaitechnologies Masquerade via DPRK Python Intrusion

Malicious WmRAT C2 Beacon via excerorderslist Endpoint (via proxy)

Malicious DarkGate C2 Communication via Synapse User-Agent (via proxy)

Malicious NANOREMOTE C2 Beacon by User-Agent

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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