BeaEngine is a C library designed to decode instructions from 16 bits, 32 bits and 64 bits intel architectures. It includes standard instructions set and instructions set from FPU, MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, VMX, CLMUL, AES, MPX, AVX, AVX2, AVX512 (VEX & EVEX prefixes), CET, BMI1, BMI2, SGX, UINTR, KL, TDX and AMX extensions. If you want to analyze malicious codes and more generally obfuscated codes, BeaEngine sends back a complex structure that describes precisely the analyzed instructions.
You can use it in C/C++ (usable and compilable with Visual Studio, GCC, MinGW, DigitalMars, BorlandC, WatcomC, SunForte, Pelles C, LCC), in assembler (usable with masm32 and masm64, nasm, fasm, GoAsm) in C#, in Python3, in Delphi, in PureBasic and in WinDev. You can use it in user mode and kernel mode.
First, you can retrieve mnemonic and operands according to the specified syntax : intel syntax for nasm, masm32 and masm64, GoAsm32 and GoAsm64, fasm (no AT&T syntax actually). Next, you can realize accurate analysis on data-flow and control-flow to generate slices or obfuscation patterns.
Its source code is under LGPL3 license with a "Makefile builder" and headers for following languages : C/C++, C#, Python3, Delphi, PureBasic, masm32, masm64, nasm(x86 and x64), fasm(x86 and x64), GoAsm(x86 and x64).
BeaEngine is implemented using opcode tables from the intel documentation, tables from Christian Ludloff website www.sandpile.org and project x86doc from Felix Cloutier https://www.felixcloutier.com
This software is distributed under the LGPL license. See the COPYING and COPYING.LESSER files for more details.
#!/usr/bin/python3
from BeaEnginePython import *
instr = Disasm(bytes.fromhex('6202054000443322'))
instr.read()
print(instr.repr())
Output is :
vpshufb zmm24, zmm31, zmmword ptr [r11+r14+0880h]
#!/usr/bin/python3
from BeaEnginePython import *
buffer = bytes.fromhex('4831c04889fbffc04989c49031ed66586a005f80c40c')
instr = Disasm(buffer)
while instr.read() > 0:
if instr.modifies("rax"):
print(f"{instr.repr():20}rax register is modified")
else:
print(instr.repr())
Output is:
xor rax, rax rax register is modified
mov rbx, rdi
inc eax rax register is modified
mov r12, rax
nop
xor ebp, ebp
pop ax rax register is modified
push 00000000h
pop rdi
add ah, 0Ch rax register is modified
#!/usr/bin/python3
from BeaEnginePython import *
instr = Disasm(bytes.fromhex('e90000000090e901000000cc90'))
while instr.read() > 0:
print(instr.repr())
if instr.is_jump():
instr.follow()
Let's extract complete instruction structure:
#!/usr/bin/python3
from BeaEnginePython import *
instr = Disasm(bytes.fromhex('62017d8115443322'))
instr.read()
print(instr.json())
Output is:
{
"repr": "vunpckhpd xmm24, xmm16, xmmword ptr [r11+r14+0220h]",
"category": "AVX512_INSTRUCTION",
"mnemonic": "vunpckhpd ",
"bytes": "62 01 7d 81 15 44 33 22",
"error": 0,
"arch": 64,
"operands": {
"1": {
"repr": "xmm24",
"type": "register",
"size": 128,
"mode": "write",
"register": {
"type": "xmm",
"value": "REG24"
}
},
"2": {
"repr": "xmm16",
"type": "register",
"size": 128,
"mode": "read",
"register": {
"type": "xmm",
"value": "REG16"
}
},
"3": {
"repr": "r11+r14+0220h",
"type": "memory",
"size": 128,
"mode": "read",
"memory": {
"base": "REG11",
"index": "REG14",
"scale": 1,
"displacement": "0x22"
}
}
},
"registers": {
"modified": {
"type": 4,
"gpr": "",
"mmx": "",
"xmm": "REG24",
"ymm": "",
"zmm": "",
"special": "",
"cr": "",
"dr": "",
"mem_management": "",
"mpx": "",
"opmask": "",
"segment": "",
"fpu": "",
"tmm": ""
},
"read": {
"type": 5,
"gpr": "REG11+REG14",
"mmx": "",
"xmm": "REG16",
"ymm": "",
"zmm": "",
"special": "",
"cr": "",
"dr": "",
"mem_management": "",
"mpx": "",
"opmask": "",
"segment": "",
"fpu": "",
"tmm": ""
}
},
"rflags": {
"of": null,
"sf": null,
"zf": null,
"af": null,
"pf": null,
"cf": null,
"tf": null,
"if": null,
"df": null,
"nt": null,
"rf": null
}
}
https://github.com/BeaEngine/beaengine/releases
apt install cmake
git clone https://github.com/BeaEngine/beaengine.git
cmake beaengine
make
cmake -DoptBUILD_DLL=ON beaengine
make
Current documentation HERE explains how are working structures from BeaEngine.
old documentation can be read here : http://beatrix2004.free.fr/BeaEngine/index1.php
Each BeaEngine release is provided with pdf documentation:
sudo apt install pandoc texlive-latex-extra
cd doc
pandoc --highlight-style tango -V mainfont="Arial" -V geometry:margin=1cm --output=beaengine.pdf beaengine.md
pandoc --highlight-style tango -V mainfont="Arial" -V geometry:margin=1cm --output=examples.pdf examples.md
Some basic examples to show how BeaEngine is working HERE
If you want to improve BeaEngine or just add some private features, here are some links :
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent