Disabled Windows Defender Eventlog
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About the rule
Rule Type
Standard
Rule Description
Detects the disabling of the Windows Defender eventlog as seen in relation to Lockbit 3.0 infections
Severity
Trouble
Rule Requirement
Criteria
Action1:
actionname = "Registry value modified" AND (OBJECTNAME contains "\Microsoft\Windows\CurrentVersion\WINEVT\Channels\Microsoft-Windows-Windows Defender/Operational\Enabled" OR (OBJECTNAME endswith "\Microsoft\Windows\CurrentVersion\WINEVT\Channels\Microsoft-Windows-Windows Defender/Operational" AND OBJECTVALUENAME startswith "Enabled")) AND (INFORMATION = "DWORD (0x00000000)" OR (CHANGES = 0 AND NEWTYPE = "REG_DWORD"))
select Action1.HOSTNAME,Action1.MESSAGE,Action1.OBJECTNAME,Action1.PROCESSNAME,Action1.PREVVAL,Action1.CHANGES,Action1.USERNAME,Action1.DOMAIN,Action1.NEWTYPE,Action1.OBJECTVALUENAME,Action1.OLDTYPE
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Florian Roth (Nextron Systems)
