covertly-decode-and-write-data-to-windows-directory-using-indirect-calls.yml

rule:
  meta:
    name: covertly decode and write data to Windows directory using indirect calls
    namespace: data-manipulation/encoding/xor
    authors:
      - dan.kelly@mandiant.com
    scopes:
      static: function
      dynamic: unsupported  # requires characteristic features
    att&ck:
      - Defense Evasion::Obfuscated Files or Information [T1027]
    mbc:
      - Defense Evasion::Obfuscated Files or Information::Encoding-Standard Algorithm [E1027.m02]
      - Data::Encode Data::XOR [C0026.002]
  features:
    - and:
      - match: write file on Windows
      - match: encode data using XOR
      - match: create or open file
      - match: reference absolute stream path on Windows
      - match: contain loop
      - characteristic: indirect call