encrypt or decrypt via WinCrypt

rule:
  meta:
    name: encrypt or decrypt via WinCrypt
    namespace: data-manipulation/encryption
    authors:
      - moritz.raabe@mandiant.com
    scopes:
      static: function
      dynamic: thread
    att&ck:
      - Defense Evasion::Obfuscated Files or Information [T1027]
    mbc:
      - Cryptography::Decrypt Data [C0031]
      - Cryptography::Encrypt Data [C0027]
    examples:
      - A45E377DBB98A6B44FD4034BC3FFF9B0:0x4017A0
  features:
    - and:
      - or:
        - api: CryptEncrypt
        - api: CryptDecrypt
      - optional:
        - or:
          - api: CryptAcquireContext
          - api: CryptGenKey
          - api: CryptImportKey