Change User Agents with WebRequest
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About the rule
Rule Type
Standard
Rule Description
Adversaries may communicate using application layer protocols associated with web traffic to avoid detection/network filtering by blending in with existing traffic. Commands to the remote system, and often the results of those commands, will be embedded within the protocol traffic between the client and server.
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "PowerShell Script Block Logged" AND SCRIPTEXECUTED contains "Invoke-WebRequest,Invoke-RestMethod, irm ,iwr " AND SCRIPTEXECUTED contains "-UserAgent " select Action1.HOSTNAME,Action1.MESSAGE,Action1.SCRIPTEXECUTED
Detection
Execution Mode
realtime
Log Sources
Windows
Author
frack113
