Potential Persistence Via Microsoft Office Add-In
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About the rule
Rule Type
Standard
Rule Description
Detects potential persistence activity via startup add-ins that load when Microsoft Office starts (.wll/.xll are simply .dll fit for Word or Excel).
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "File Created or Modified" AND ((FILENAME contains "\Microsoft\Word\Startup" OR OBJECTNAME contains "\Microsoft\Word\Startup") AND (FILENAME endswith ".wll" OR OBJECTNAME endswith ".wll")) OR ((FILENAME contains "\Microsoft\Excel\Startup" OR OBJECTNAME contains "\Microsoft\Excel\Startup") AND (FILENAME endswith ".xll" OR OBJECTNAME endswith ".xll")) OR ((FILENAME contains "Microsoft\Excel\XLSTART" OR OBJECTNAME contains "Microsoft\Excel\XLSTART") AND (FILENAME endswith ".xlam" OR OBJECTNAME endswith ".xlam")) OR ((FILENAME contains "\Microsoft\Addins" OR OBJECTNAME contains "\Microsoft\Addins") AND (FILENAME endswith ".xlam,.xla,.ppam" OR OBJECTNAME endswith ".xlam,.xla,.ppam")) select Action1.HOSTNAME,Action1.MESSAGE,Action1.USERNAME,Action1.DOMAIN,Action1.OBJECTNAME,Action1.FILENAME,Action1.PROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
NVISO
