Suspicious FvncBot Device Registration Request Over HTTP

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 POST requests to the FvncBot registration endpoint /api/v1/devices/register, the unencrypted enrollment call the Android banking trojan makes on first check-in. The request carries device metadata as cleartext JSON before the operator issues WebSocket control commands. The fixed URI path identifies the trojan family independent of the C2 host in use.

Reporting behind it

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Suspicious FvncBot Device Registration Request Over HTTP

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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