rule:
  meta:
    name: encode data using Base64 via WinAPI
    namespace: data-manipulation/encoding/base64
    authors:
      - moritz.raabe@mandiant.com
    scopes:
      static: basic block
      dynamic: thread
    att&ck:
      - Defense Evasion::Obfuscated Files or Information [T1027]
    examples:
      - mimikatz.exe_:0x40622D
  features:
    - and:
      - number: 1 = dwFlags=CRYPT_STRING_BASE64
      - api: CryptBinaryToString