EVTX Created In Uncommon Location
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About the rule
Rule Type
Standard
Rule Description
Detects the creation of new files with the ".evtx" extension in non-common or non-standard location. This could indicate tampering with default EVTX locations in order to evade security controls or simply exfiltration of event log to search for sensitive information within. Note that backup software and legitimate administrator might perform similar actions during troubleshooting.
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "File Created or Modified" AND (FILENAME endswith ".evtx" OR OBJECTNAME endswith ".evtx") AND ((FILENAME notstartswith "C:\Windows\System32\winevt\Logs" AND OBJECTNAME notstartswith "C:\Windows\System32\winevt\Logs") AND ((FILENAME notstartswith "C:\ProgramData\Microsoft\Windows\Containers\BaseImages" AND OBJECTNAME notstartswith "C:\ProgramData\Microsoft\Windows\Containers\BaseImages") OR (FILENAME notendswith "\Windows\System32\winevt\Logs" AND OBJECTNAME notendswith "\Windows\System32\winevt\Logs"))) select Action1.HOSTNAME,Action1.MESSAGE,Action1.USERNAME,Action1.DOMAIN,Action1.OBJECTNAME,Action1.FILENAME,Action1.PROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
D3F7A5105
