Potential CVE-2023-36874 Exploitation - Fake Wermgr.Exe Creation
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About the rule
Rule Type
Standard
Rule Description
Detects the creation of a file named "wermgr.exe" being created in an uncommon directory. This could be a sign of potential exploitation of CVE-2023-36874.
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "File Created or Modified" AND (FILENAME endswith "\wermgr.exe" OR OBJECTNAME endswith "\wermgr.exe") AND (FILENAME notcontains ":\$WINDOWS.~BT\NewOS\,:\$WinREAgent\,:\Windows\servicing\LCU\,:\Windows\System32\,:\Windows\SysWOW64\,:\Windows\WinSxS\,:\WUDownloadCache\,:\Windows\SoftwareDistribution\Download" AND OBJECTNAME notcontains ":\$WINDOWS.~BT\NewOS\,:\$WinREAgent\,:\Windows\servicing\LCU\,:\Windows\System32\,:\Windows\SysWOW64\,:\Windows\WinSxS\,:\WUDownloadCache\,:\Windows\SoftwareDistribution\Download") select Action1.HOSTNAME,Action1.MESSAGE,Action1.USERNAME,Action1.DOMAIN,Action1.OBJECTNAME,Action1.FILENAME,Action1.PROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Nasreddine Bencherchali (Nextron Systems)
