rule:
meta:
name: resolve function by FNV-1a hash
namespace: linking/runtime-linking
authors:
- still@teamt5.org
description: known import name hashes calculated using the non-cryptographic FNV-1a hashing algorithm
scopes:
static: function
dynamic: thread
att&ck:
- Defense Evasion::Obfuscated Files or Information::Indicator Removal from Tools [T1027.005]
references:
- https://blog.xorhex.com/blog/reddeltaplugxchangeup/
features:
- or:
- number: 0x53b2070f = FNV(LoadLibraryA)
- number: 0xfaba0065 = FNV(CloseHandle)
- number: 0x03285501 = FNV(VirtualAlloc)
- number: 0x820621f3 = FNV(VirtualProtect)
- number: 0xf8f45725 = FNV(GetProcAddress)
- number: 0xbdcac9ce = FNV(CreateFileA)
- number: 0xafcab3c4 = FNV(CreateFileW)
- number: 0x54fcc943 = FNV(ReadFile)
- number: 0x2fa62ca8 = FNV(Sleep)
last edited: 2023-11-24 10:34:28