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MediumSigmaHQRoberto Rodriguez (Cyb3rWard0g) +1

WMIC Loading Scripting Libraries

Detects threat actors proxy executing code and bypassing application controls by leveraging wmic and the `/FORMAT` argument switch to download and execute an XSL file (i.e js, vbs, etc). It could be an indicator of…

Description

Detects threat actors proxy executing code and bypassing application controls by leveraging wmic and the `/FORMAT` argument switch to download and execute an XSL file (i.e js, vbs, etc). It could be an indicator of SquiblyTwo technique, which uses Windows Management Instrumentation (WMI) to execute malicious code.

Detection logic

Detection requirements

Platform
Windows

The rule states no platform. This is derived from the ATT&CK technique it maps to.

Log source product
windows
Log source category
image_load

Known benign triggers

  • Since the ImageLoad event doesn't have enough information in this case. It's better to look at the recent process creation events that spawned the WMIC process and investigate the command line and parent/child processes to get more insights
  • The command `wmic ntevent` loads vbscript.dll
  • The command wmic os get lastbootuptime loads vbscript.dll
  • The command wmic os get locale loads vbscript.dll

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