MSIX AISTUBS Process Execution

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About the rule

Rule Type

Standard

Rule Description

Identifies execution of MSIX AI_STUBS components, potentially indicating malicious MSIX package activity used for code execution or defense evasion.

Severity

Attention

Rule Requirement

Criteria

Action1: actionname = "Process started" AND (PROCESSNAME endswith "AiStubX64Elevated.exe,AiStubX86Elevated.exe,AiStubX64.exe,AiStubX86.exe,AiStub.exe" OR ORIGINALFILENAME contains "popupwrapper.exe") select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME,Action1.DOMAIN,Action1.ORIGINALFILENAME,Action1.PARENTPROCESSID,Action1.PROCESSID,Action1.PRODUCT_NAME,Action1.SECURITYID

Detection

Execution Mode

realtime

Log Sources

Windows

Author

@Michael Haag, Swachchhanda Shrawan Poudel (Nextron Systems)