unmount-volume-via-ioctl.yml

rule:
  meta:
    name: unmount volume via IOCTL
    namespace: host-interaction/hardware/storage
    authors:
      - william.ballenthin@mandiant.com
    scopes:
      static: function
      dynamic: call
    references:
      - https://www.crowdstrike.com/blog/the-anatomy-of-wiper-malware-part-3/
  features:
    - and:
      - or:
        - match: interact with driver via IOCTL
        - characteristic: indirect call
      - and:
        - number: 0x90018 = FSCTL_LOCK_VOLUME
        - number: 0x90020 = FSCTL_DISMOUNT_VOLUME