Suspicious adhapl Service DLL Dropped in System32 by BellaCPP

ATT&CK techniques

Persistence → Priv Esc

Recon
Resource Dev
Initial Access
Execution
Persistence
- T1543.003Windows Service
Priv Esc
- T1543.003Windows Service
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects creation of adhapl.dll in the Windows System32 directory, the service DLL used by the BellaCPP backdoor exporting ServiceMain. BellaCPP, a C++ variant of BellaCiao, installs this DLL to run as a persistent service. Presence of this specific DLL in System32 indicates BellaCPP deployment.

Reporting behind it

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Suspicious adhapl Service DLL Dropped in System32 by BellaCPP

Pivot detection · T1543.003 · 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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