generate random numbers via WinAPI

rule:
  meta:
    name: generate random numbers via WinAPI
    namespace: data-manipulation/prng
    authors:
      - michael.hunhoff@mandiant.com
      - johnk3r
    scopes:
      static: function
      dynamic: thread
    mbc:
      - Cryptography::Generate Pseudo-random Sequence::Use API [C0021.003]
    examples:
      - ba947eb07d8c823949316a97364d060f:0x1400031E0
      - 3ca359f5085bb96a7950d4735b089ffe:0x403A80
      - e59ffeaf7acb0c326e452fa30bb71a36:0x40403E
      - 1195d0d18be9362fb8dd9e1738404c9d:0x404E90
  features:
    - and:
      - or:
        - api: BCryptGenRandom
        - api: CryptGenRandom
      - optional:
        - api: BCryptOpenAlgorithmProvider
        - api: BCryptCloseAlgorithmProvider
        - api: CryptAquireContext