rule:
  meta:
    name: delay execution
    authors:
      - michael.hunhoff@mandiant.com
      - "@ramen0x3f"
    lib: true
    scopes:
      static: basic block
      dynamic: call
    mbc:
      - Anti-Behavioral Analysis::Dynamic Analysis Evasion::Delayed Execution [B0003.003]
    references:
      - https://docs.microsoft.com/en-us/windows/win32/sync/wait-functions
      - https://github.com/LordNoteworthy/al-khaser/blob/master/al-khaser/TimingAttacks/timing.cpp
    examples:
      - al-khaser_x86.exe_:0x449770
      - B5F85C26D7AA5A1FB4AF5821B6B5AB9B:0x402FA6
  features:
    - or:
      - and:
        - os: windows
        - or:
          - api: kernel32.Sleep
          - api: kernel32.SleepEx
          - api: kernel32.WaitForSingleObject
          - api: kernel32.SignalObjectAndWait
          - api: kernel32.WaitForSingleObjectEx
          - api: kernel32.WaitForMultipleObjects
          - api: kernel32.WaitForMultipleObjectsEx
          - api: kernel32.RegisterWaitForSingleObject
          - api: WaitOnAddress
          - api: user32.MsgWaitForMultipleObjects
          - api: user32.MsgWaitForMultipleObjectsEx
          - api: NtDelayExecution
          - api: KeWaitForSingleObject
          - api: KeDelayExecutionThread
      - and:
        - or:
          - os: linux
          - os: android
        - or:
          - api: sleep
          - api: usleep