Sysinternals PsSuspend Suspicious Execution

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About the rule

Rule Type

Standard

Rule Description

Detects suspicious execution of Sysinternals PsSuspend, where the utility is used to suspend critical processes such as AV or EDR to bypass defenses

Severity

Trouble

Rule Requirement

Criteria

Action1: actionname = "Process started" AND (ORIGINALFILENAME = "pssuspend.exe" OR PROCESSNAME endswith "\pssuspend.exe,\pssuspend64.exe") AND COMMANDLINE contains "msmpeng.exe" select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME

Detection

Execution Mode

realtime

Log Sources

Windows

Author

Nasreddine Bencherchali (Nextron Systems)