encrypt data using AES via WinAPI

rule:
  meta:
    name: encrypt data using AES via WinAPI
    namespace: data-manipulation/encryption/aes
    authors:
      - moritz.raabe@mandiant.com
    scopes:
      static: function
      dynamic: thread
    att&ck:
      - Defense Evasion::Obfuscated Files or Information [T1027]
    mbc:
      - Defense Evasion::Obfuscated Files or Information::Encryption-Standard Algorithm [E1027.m05]
      - Cryptography::Encrypt Data::AES [C0027.001]
    examples:
      - BC577119D1A5B7DA489E7B5817D3CC38:0x10002FAC
  features:
    - and:
      - or:
        - number: 0x6611 = CALG_AES
        - number: 0x660E = CALG_AES_128
        - number: 0x660F = CALG_AES_192
        - number: 0x6610 = CALG_AES_256
      - or:
        - api: CryptGenKey
        - api: CryptDeriveKey
        - api: CryptImportKey
      - optional:
        - or:
          - number: 1 = PROV_RSA_FULL
          - api: CryptAcquireContext
          - api: CryptEncrypt
          - api: CryptDecrypt