AWL Bypass with Winrm.vbs and Malicious WsmPty.xsl/WsmTxt.xsl - File
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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 = "File Created or Modified" AND ((FILENAME endswith "WsmPty.xsl,WsmTxt.xsl" OR OBJECTNAME endswith "WsmPty.xsl,WsmTxt.xsl") AND ((FILENAME notstartswith "C:\Windows\System32\,C:\Windows\SysWOW64" AND HOSTTYPE != "windows") OR (OBJECTNAME notstartswith "C:\Windows\System32\,C:\Windows\SysWOW64" AND HOSTTYPE != "Sysmon"))) select Action1.HOSTNAME,Action1.MESSAGE,Action1.USERNAME,Action1.DOMAIN,Action1.OBJECTNAME,Action1.FILENAME,Action1.PROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Julia Fomina, oscd.community
