capa-rules/host-interaction/process/get-process-heap-flags.yml

rule:
  meta:
    name: get process heap flags
    namespace: host-interaction/process
    authors:
      - [email protected]
    scopes:
      static: basic block
      dynamic: unsupported
    att&ck:
      - Discovery::Process Discovery [T1057]
    references:
      - https://github.com/LordNoteworthy/al-khaser/blob/bed03d2f849d9060c68f8d5905bd204d0cb3f593/al-khaser/AntiDebug/ProcessHeap_Flags.cpp#L13
    examples:
      - al-khaser_x86.exe_:0x425470
  features:
    - and:
      - or:
        - match: PEB access
        - api: GetProcessHeap
      - or:
        - and:
          - arch: i386
          - offset: 0x18 = PEB->ProcessHeap
          - or:
            - offset: 0x40 = ProcessHeap->HeapFlags >= Vista
            - offset: 0xC = ProcessHeap->HeapFlags < Vista
        - and:
          - arch: amd64
          - offset: 0x30 = PEB->ProcessHeap
          - or:
            - offset: 0x70 = ProcessHeap->HeapFlags >= Vista
            - offset: 0x14 = ProcessHeap->HeapFlags < Vista