AWL Bypass with Winrm.vbs and Malicious WsmPty.xsl/WsmTxt.xsl
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About the rule
Rule Type
Standard
Rule Description
Detects execution of attacker-controlled WsmPty.xsl or WsmTxt.xsl via winrm.vbs and copied cscript.exe (can be renamed)
Severity
Trouble
Rule Requirement
Criteria
Action1:
actionname = "Process started" AND COMMANDLINE contains "winrm" AND (COMMANDLINE contains "format:pretty,format:"pretty",format:"text",format:text" AND PROCESSNAME notstartswith "C:\Windows\System32\,C:\Windows\SysWOW64")
select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME,Action1.DOMAIN,Action1.ORIGINALFILENAME,Action1.PARENTPROCESSID,Action1.PROCESSID,Action1.PRODUCT_NAME,Action1.SECURITYID
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Julia Fomina, oscd.community
