Suspicious IIS Module Registration
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About the rule
Rule Type
Standard
Rule Description
Detects a suspicious IIS module registration as described in Microsoft threat report on IIS backdoors
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "Process started" AND PARENTPROCESSNAME endswith "\w3wp.exe" AND (COMMANDLINE contains "appcmd.exe add module" OR (COMMANDLINE contains " system.enterpriseservices.internal.publish" AND PROCESSNAME endswith "\powershell.exe") OR (COMMANDLINE contains "gacutil" AND COMMANDLINE contains " /I")) select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Florian Roth (Nextron Systems), Microsoft (idea)
