Diskshadow Script Mode - Uncommon Script Extension Execution

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About the rule

Rule Type

Standard

Rule Description

Detects execution of "Diskshadow.exe" in script mode to execute an script with a potentially uncommon extension. Initial baselining of the allowed extension list is required.

Severity

Trouble

Rule Requirement

Criteria

Action1: actionname = "Process started" AND ((ORIGINALFILENAME = "diskshadow.exe" OR PROCESSNAME endswith "\diskshadow.exe") AND COMMANDLINE contains "-s ,/s ,–s ,—s ,―s ") AND COMMANDLINE notcontains ".txt" 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)