Suspicious .NET Utility Spawned by AutoHotkey Loader for Process Hollowing (via process_creation)

ATT&CK techniques

Priv Esc → Defense Evasion

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
- T1055.012Process Hollowing
Defense Evasion
- T1055.012Process Hollowing
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects the AsyncRAT loader hollowing legitimate .NET Framework utilities such as AddInProcess32.exe, AppLaunch.exe and aspnet_compiler.exe launched from the Windows Sound Diagnostics staging folder. These binaries are injected with the final remote access trojan. A parent located in that package path spawning these utilities indicates hollowing.

Reporting behind it

Related detections9 linkedT1055.012 — drag to rearrange

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Suspicious Outbound Connection from tracerpt.exe after Process Hollowing (via network_connection)

Suspicious .NET Utility Spawned by AutoHotkey Loader for Process Hollowing (via process_creation)

Pivot detection · T1055.012 · 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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