longinus

Longinus is a byte signature tree generator and scanner for finding byte patterns in binary files. In Brazil, Saint Longinus is known for its power of finding missing objects.

Usage

The point of this application is to be agnostic to whatever executable you are scanning, so all you need to do is define a configuration for Longinus and run the command:

./longinus -executable <PATH> -config <PATH>

Configuration

The configuration is a yaml file containing the executable name and a list of signatures with its properties, the available properties are:

Name	Description
name	Name of the signature
signature	Byte array of the signature, it supports wildcards as ??
instruction_offset	The offset that will be added to the address where the signature was found
is_relative	If true, the address where the signature was found will be used. If the value is false, the value will be address + *(address + offset)

executables:
  - name: executable_name.exe
    signatures:
      - name: "PATTERN_NAME"                 
        signature: "48 8B ?? ?? ?? ?? 00 ??" 
        instruction_offset: 3                 
        is_relative: true                     

You can also find an example under the ./configuration/default.yaml folder.

Details

The signatures will be converted to a linked list and merged into a tree, which means the following signatures:

• 48 8B 05 ?? 02 00
• 48 8B 15 ?? ??
• 40 53 48 83

Will be merged into this:

         ┌──────┐
         │ root │
         └──┬───┘
      ┌─────┴─────┐
    ┌─┴──┐      ┌─┴──┐
    │ 48 │      │ 40 │
    └─┬──┘      └─┬──┘
      │           │
    ┌─┴──┐      ┌─┴──┐
    │ 8B │      │ 53 │
    └─┬──┘      └─┬──┘
  ┌───┴───┐       │
┌─┴──┐  ┌─┴──┐  ┌─┴──┐
│ 05 │  │ 15 │  │ 48 │
└─┬──┘  └─┬──┘  └────┘
  │       │
┌─┴──┐  ┌─┴──┐
│ ?? │  │ ?? │
└─┬──┘  └────┘
  │
┌─┴──┐
│ 02 │
└────┘