Suspicious Invoke-Item From Mount-DiskImage

Title: Suspicious Invoke-Item From Mount-DiskImage
Status: test
Description:Adversaries may abuse container files such as disk image (.iso, .vhd) file formats to deliver malicious payloads that may not be tagged with MOTW.
References:
  -https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1553.005/T1553.005.md#atomic-test-2---mount-an-iso-image-and-run-executable-from-the-iso
  -https://learn.microsoft.com/en-us/powershell/module/storage/mount-diskimage?view=windowsserver2022-ps
Author: frack113
Date: 2022-02-01
modified:None
Tags:

• -'attack.defense-impairment'
• -'attack.t1553.005'

Logsource:

• product: windows
• category: ps_script
• definition: Requirements: Script Block Logging must be enabled

Detection:
  selection:
    ScriptBlockText|contains|all:
      -'Mount-DiskImage '
      -'-ImagePath '
      -'Get-Volume'
      -'.DriveLetter'
      -'invoke-item '
      -'):\'

  condition:selection
Falsepositives:
  -Legitimate PowerShell scripts
Level: medium