Suspicious RegAsm or AppLaunch Outbound Connection after Injection

ATT&CK techniques

Priv Esc → C2

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
- T1055.012Process Hollowing
Defense Evasion
- T1055.012Process Hollowing
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1071.001Web Protocols
Exfiltration
Impact

What it detects

This rule detects the RegAsm or AppLaunch dotnet utilities making outbound internet connections. AsyncRAT was injected into these signed binaries so its RC4 encrypted C2 traffic originates from a trusted image. Neither utility normally reaches external hosts so outbound traffic indicates injected malware beaconing.

Reporting behind it

Related detections9 linkedT1055.012 — drag to rearrange

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Suspicious Outbound Network Connection from msiexec.exe (via network_connection)

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

Suspicious DotNet Utility MSBuild RegAsm RegSvcs Network Beacon Indicating Hollowing

Suspicious SearchProtocolHost Network Connection Indicating Process Hollowing

Suspicious RegAsm or AppLaunch Outbound Connection after Injection

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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