Potential Privilege Escalation To LOCAL SYSTEM
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About the rule
Rule Type
Standard
Rule Description
Detects unknown program using commandline flags usually used by tools such as PsExec and PAExec to start programs with SYSTEM Privileges
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "Process started" AND (COMMANDLINE contains " -s cmd, /s cmd, –s cmd, —s cmd, ―s cmd" OR COMMANDLINE contains " -s -i cmd, -s /i cmd, -s –i cmd, -s —i cmd, -s ―i cmd, /s -i cmd, /s /i cmd, /s –i cmd, /s —i cmd, /s ―i cmd, –s -i cmd, –s /i cmd, –s –i cmd, –s —i cmd, –s ―i cmd, —s -i cmd, —s /i cmd, —s –i cmd, —s —i cmd, —s ―i cmd, ―s -i cmd, ―s /i cmd, ―s –i cmd, ―s —i cmd, ―s ―i cmd" OR COMMANDLINE contains " -i -s cmd, -i /s cmd, -i –s cmd, -i —s cmd, -i ―s cmd, /i -s cmd, /i /s cmd, /i –s cmd, /i —s cmd, /i ―s cmd, –i -s cmd, –i /s cmd, –i –s cmd, –i —s cmd, –i ―s cmd, —i -s cmd, —i /s cmd, —i –s cmd, —i —s cmd, —i ―s cmd, ―i -s cmd, ―i /s cmd, ―i –s cmd, ―i —s cmd, ―i ―s cmd" OR COMMANDLINE contains " -s pwsh, /s pwsh, –s pwsh, —s pwsh, ―s pwsh" OR COMMANDLINE contains " -s -i pwsh, -s /i pwsh, -s –i pwsh, -s —i pwsh, -s ―i pwsh, /s -i pwsh, /s /i pwsh, /s –i pwsh, /s —i pwsh, /s ―i pwsh, –s -i pwsh, –s /i pwsh, –s –i pwsh, –s —i pwsh, –s ―i pwsh, —s -i pwsh, —s /i pwsh, —s –i pwsh, —s —i pwsh, —s ―i pwsh, ―s -i pwsh, ―s /i pwsh, ―s –i pwsh, ―s —i pwsh, ―s ―i pwsh" OR COMMANDLINE contains " -i -s pwsh, -i /s pwsh, -i –s pwsh, -i —s pwsh, -i ―s pwsh, /i -s pwsh, /i /s pwsh, /i –s pwsh, /i —s pwsh, /i ―s pwsh, –i -s pwsh, –i /s pwsh, –i –s pwsh, –i —s pwsh, –i ―s pwsh, —i -s pwsh, —i /s pwsh, —i –s pwsh, —i —s pwsh, —i ―s pwsh, ―i -s pwsh, ―i /s pwsh, ―i –s pwsh, ―i —s pwsh, ―i ―s pwsh" OR COMMANDLINE contains " -s powershell, /s powershell, –s powershell, —s powershell, ―s powershell" OR COMMANDLINE contains " -s -i powershell, -s /i powershell, -s –i powershell, -s —i powershell, -s ―i powershell, /s -i powershell, /s /i powershell, /s –i powershell, /s —i powershell, /s ―i powershell, –s -i powershell, –s /i powershell, –s –i powershell, –s —i powershell, –s ―i powershell, —s -i powershell, —s /i powershell, —s –i powershell, —s —i powershell, —s ―i powershell, ―s -i powershell, ―s /i powershell, ―s –i powershell, ―s —i powershell, ―s ―i powershell" OR COMMANDLINE contains " -i -s powershell, -i /s powershell, -i –s powershell, -i —s powershell, -i ―s powershell, /i -s powershell, /i /s powershell, /i –s powershell, /i —s powershell, /i ―s powershell, –i -s powershell, –i /s powershell, –i –s powershell, –i —s powershell, –i ―s powershell, —i -s powershell, —i /s powershell, —i –s powershell, —i —s powershell, —i ―s powershell, ―i -s powershell, ―i /s powershell, ―i –s powershell, ―i —s powershell, ―i ―s powershell") AND COMMANDLINE notcontains "paexec,PsExec,accepteula" select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)
