Winlogon AllowMultipleTSSessions Enable
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About the rule
Rule Type
Standard
Rule Description
Detects when the 'AllowMultipleTSSessions' value is enabled. Which allows for multiple Remote Desktop connection sessions to be opened at once. This is often used by attacker as a way to connect to an RDP session without disconnecting the other users
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "Registry value modified" AND (OBJECTNAME endswith "\Microsoft\Windows NT\CurrentVersion\Winlogon\AllowMultipleTSSessions" OR (OBJECTNAME endswith "\Microsoft\Windows NT\CurrentVersion\Winlogon" AND OBJECTVALUENAME = "AllowMultipleTSSessions")) AND INFORMATION endswith "DWORD (0x00000001)" select Action1.HOSTNAME,Action1.MESSAGE,Action1.OBJECTNAME,Action1.PROCESSNAME,Action1.PREVVAL,Action1.CHANGES
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Nasreddine Bencherchali (Nextron Systems)
