Xori - Custom disassembly framework

Xori is an automation-ready disassembly and static analysis library that consumes shellcode or PE binaries and provides triage analysis data.

Architectures:

i386
x86-64

File Formats

PE, PE+
Plain shellcode

Current Features

Outputs json of the 1) Disassembly, 2) Functions, and 3) Imports.
Manages Image and Stack memory.
2 modes:
- Light Emulation - meant to enumerate all paths (Registers, Stack, Some Instructions).
- Full Emulation - only follows the code’s path (Slow performance).
Simulated TEB & PEB structures.
Evaluates functions based on DLL exports.
Displays strings based on referenced memory locations.
Uses FLIRT style signatures (Fast Library Identification and Recognition Technology).
Allows you to use your own exports for simulating the PEB.
Will detect padding after a non-returning call.
Will try to identify function references from offsets.

What it doesn't do yet:

The engine is interactive.
Does not dump strings.
Does not process non-executable sections.
TEB and PEB are not enabled for non-pe files.
Only some x86 instructions are emulated, not all.
Patching and assembling.
No plugins or scripting.

Documentation

Requirements

rustc 1.27.0

Install rust for OSX & Linux Distros

curl https://sh.rustup.rs -sSf | sh

Install rust for Windows

https://www.rust-lang.org/en-US/other-installers.html

Select:

x86_64-pc-windows-gnu or
x86_64-pc-windows-msvc (Visual Studio Build Tools Required)

Installation

1. Build Xori

This command will also create other binaries such as pesymbols ans peinfo.

git clone https://github.com/endgameinc/xori.git
cd xori
cargo build --release

2. Create xori.json config file

cp xori.json.example xori.json
[edit if desired]

3. (Optional) Build the symbols files

If you want to create your own symbol files you need to set the dll folders to where you stored your windows dlls.

"function_symbol32": "./src/analysis/symbols/generated_user_syswow64.json",
"function_symbol64": "./src/analysis/symbols/generated_user_system32.json",
"symbol_server": {
	"dll_folder32": "./dlls/32bit",
	"dll_folder64": "./dlls/64bit"

Run pesymbols to overwrite the function_symbol json

 ./target/release/pesymbols

Run

./target/release/xori -f test.exe

Run all tests

cargo test

Browser GUI

Chrome	Firefox	Safari	IE	Opera
Latest ✔	Latest ✔	Latest ✔	x	Latest ✔

Requirements

nodejs yarn (optional for UI dev)

Build

cd gui
npm install

Run

In one terminal

cd gui
node src/server.js

In another terminal

cd gui
npm start

It will open your default browser to http://localhost:3000/. The backend API is listening on localhost:5000.