Suspicious Unblock-File

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About the rule

Rule Type

Standard

Rule Description

Remove the Zone.Identifier alternate data stream which identifies the file as downloaded from the internet.

Severity

Trouble

Rule Requirement

Criteria

Action1: actionname = "PowerShell Script Block Logged" AND SCRIPTEXECUTED contains "Unblock-File " AND SCRIPTEXECUTED contains "-Path " select Action1.HOSTNAME,Action1.MESSAGE,Action1.SCRIPTEXECUTED

Detection

Execution Mode

realtime

Log Sources

Windows

Author

frack113