title: XSL Script Processing
id: 05c36dd6-79d6-4a9a-97da-3db20298ab2d
status: experimental
description: Extensible Stylesheet Language (XSL) files are commonly used to describe the processing and rendering of data within XML files. Rule detects when adversaries
    abuse this functionality to execute arbitrary files while potentially bypassing application whitelisting defenses.
author: Timur Zinniatullin, oscd.community
date: 2019/10/21
modified: 2019/11/04
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1220/T1220.md
logsource:
    category: process_creation
    product: windows
detection:
    selection:
      - Image|endswith: '\wmic.exe'
        CommandLine|contains: '/format' # wmic process list /FORMAT /?
      - Image|endswith: '\msxsl.exe'
    condition: selection
falsepositives:
    - WMIC.exe FP depend on scripts and administrative methods used in the monitored environment.
    - msxsl.exe is not installed by default, so unlikely.
level: medium
tags:
    - attack.defense_evasion
    - attack.t1220
    - attack.execution # an old one