Malicious AppDomainManager Injection via MyAppDomainManager DLL Load
- Product
- windows
- Category
- image_load
- Author
- HuntRule
- Published
- 2026-05-11
- Updated
- 2026-08-28
ATT&CK techniques
Execution → Defense EvasionRecon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule detects a .NET process loading a module named MyAppDomainManager.dll, the hijack DLL used by CL-STA-1062 to abuse the AppDomainManager configuration in chrome_setup.exe.config and run the TinyRCT backdoor inside a trusted process. Catching this load reveals CLR AppDomainManager injection used for defense evasion and stealthy code execution.
Reporting behind it
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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