check for minimum number of windows on screen

rule:
  meta:
    name: check for minimum number of windows on screen
    namespace: anti-analysis/anti-vm/vm-detection
    authors:
      - echernofsky@google.com
    scopes:
      static: basic block
      dynamic: unsupported  # requires mnemonic features
    att&ck:
      - Defense Evasion::Virtualization/Sandbox Evasion::System Checks [T1497.001]
    references:
      - https://www.crowdstrike.com/blog/guloader-dissection-reveals-new-anti-analysis-techniques-and-code-injection-redundancy/
      - https://elis531989.medium.com/dancing-with-shellcodes-cracking-the-latest-version-of-guloader-75083fb15cb4
    # examples:
    #   - 
  features:
    - and:
      - api: EnumWindows
      - instruction:
        - mnemonic: cmp
        - number: 0xC = minimum number of windows expected