Carbon Black Cloud: Alerts for "The application powershell_ise.exe attempted to execute fileless content in order to evade inspection."

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Environment

• Carbon Black Cloud Sensor: 3.6.x - 3.8.0.627
• Microsoft Windows: All Supported Versions

Symptoms

Seeing events similar to:

The application powershell_ise.exe attempted to execute fileless content in order to evade inspection. A Deny policy action was applied.

CMD:
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoExit -Command Help Set-ExecutionPolicy

Cause

Code change DSEN-19179

Resolution

Upgrade to 3.8.0.722 or above

VMware Carbon Black Cloud Windows Sensor 3.8.0.722 Release Notes

• DSEN-19179: Fixed an issue with PowerShell fileless script rules blocking the use of the “-executionpolicy” command line option