Winlogon Helper DLL
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About the rule
Rule Type
Standard
Rule Description
Winlogon.exe is a Windows component responsible for actions at logon/logoff as well as the secure attention sequence (SAS) triggered by Ctrl-Alt-Delete. Registry entries in HKLM\\Software[Wow6432Node]Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\ and HKCU\\Software\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\ are used to manage additional helper programs and functionalities that support Winlogon. Malicious modifications to these Registry keys may cause Winlogon to load and execute malicious DLLs and/or executables.
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "PowerShell Script Block Logged" AND SCRIPTEXECUTED contains "CurrentVersion\Winlogon" AND SCRIPTEXECUTED contains "Set-ItemProperty,New-Item" select Action1.HOSTNAME,Action1.MESSAGE,Action1.SCRIPTEXECUTED
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Timur Zinniatullin, oscd.community
