Sticky Key Like Backdoor Usage - Registry
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About the rule
Rule Type
Standard
Rule Description
Detects the usage and installation of a backdoor that uses an option to register a malicious debugger for built-in tools that are accessible in the login screen
Severity
Critical
Rule Requirement
Criteria
Action1: actionname = "Registry Event" AND OBJECTNAME endswith "\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\sethc.exe\Debugger,\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\utilman.exe\Debugger,\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\osk.exe\Debugger,\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Magnify.exe\Debugger,\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Narrator.exe\Debugger,\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\DisplaySwitch.exe\Debugger,\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\atbroker.exe\Debugger,\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\HelpPane.exe\Debugger" OR (OBJECTNAME endswith "\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\sethc.exe,\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\utilman.exe,\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\osk.exe,\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Magnify.exe,\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Narrator.exe,\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\DisplaySwitch.exe,\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\atbroker.exe,\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\HelpPane.exe" AND OBJECTVALUENAME = "Debugger,Debugger,Debugger,Debugger,Debugger,Debugger,Debugger,Debugger") select Action1.HOSTNAME,Action1.MESSAGE,Action1.PROCESSNAME,Action1.OBJECTNAME,Action1.OBJECTVALUENAME,Action1.ACCESSES,Action1.USERNAME,Action1.DOMAIN,Action1.PREVVAL,Action1.CHANGES,Action1.INFORMATION
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Florian Roth (Nextron Systems), @twjackomo, Jonhnathan Ribeiro, oscd.community
