Malicious DDoSia Client C2 Check-In via Fixed User-Agent

ATT&CK techniques

C2 → Impact

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1071.001Web Protocols
Exfiltration
Impact
- T1498Network Denial of Service

What it detects

This rule detects the NoName057(16) DDoSia client registering with its C2 by POSTing to a /client/login endpoint using a hardcoded legacy Gecko User-Agent. The combination of that outdated User-Agent string and the login path identifies the DDoS bot fetching its target list.

Reporting behind it

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Malicious DDoSia Client C2 Check-In via Fixed 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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