resolve-function-by-hash.yml

rule:
  meta:
    name: resolve function by hash
    namespace: linking/runtime-linking
    author: william.ballenthin@fireeye.com
    scope: function
    att&ck:
      - Defense Evasion::Obfuscated Files or Information::Indicator Removal from Tools [T1027.005]
    references:
      - https://www.fireeye.com/blog/threat-research/2012/11/precalculated-string-hashes-reverse-engineering-shellcode.html
      - https://pastebin.com/ci5XYW4P
    examples:
  features:
    - or:
      - number: 0x6a4abc5b = ROR13(kernel32.dll)
      - number: 0x3cfa685d = ROR13(ntdll.dll)
      - number: 0xec0e4e8e = ROR13(LoadLibraryA)
      - number: 0x7c0dfcaa = ROR13(GetProcAddress)
      - number: 0x91afca54 = ROR13(VirtualAlloc)
      - number: 0x534c0ab8 = ROR13(NtFlushInstructionCache)
      - number: 0xff7f061a = ROR13(RtlExitUserThread)
      - number: 0x60e0ceef = ROR13(ExitThread)