capt-meelo / lazzzy

laZzzy is a shellcode loader, developed using different open-source libraries, that demonstrates different execution techniques.

laZzzy

laZzzy is a shellcode loader that demonstrates different execution techniques commonly employed by malware. laZzzy was developed using different open-source header-only libraries.

Features

• Direct syscalls and native (Nt*) functions (not all functions but most)
• Import Address Table (IAT) evasion
• Encrypted payload (XOR and AES)
  • Randomly generated key
  • Automatic padding (if necessary) of payload with NOPS (\x90)
  • Byte-by-byte in-memory decryption of payload
• XOR-encrypted strings
• PPID spoofing
• Blocking of non-Microsoft-signed DLLs
• (Optional) Cloning of PE icon and attributes
• (Optional) Code signing with spoofed cert

How to Use

Requirements:

• Windows machine w/ Visual Studio and the following components, which can be installed from Visual Studio Installer > Individual Components:

  • C++ Clang Compiler for Windows and C++ Clang-cl for build tools

    

  • ClickOnce Publishing

    

• Python3 and the required modules:

  • python3 -m pip install -r requirements.txt

Options:

(venv) PS C:\MalDev\laZzzy> python3 .\builder.py -h

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣀⣀⣀⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⣿⣿⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣠⣤⣤⣤⣤⠀⢀⣼⠟⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⣿⣿⠀⠀⠀⠀⢀⣀⣀⡀⠀⠀⠀⢀⣀⣀⣀⣀⣀⡀⠀⢀⣼⡿⠁⠀⠛⠛⠒⠒⢀⣀⡀⠀⠀⠀⣀⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⣿⣿⠀⠀⣰⣾⠟⠋⠙⢻⣿⠀⠀⠛⠛⢛⣿⣿⠏⠀⣠⣿⣯⣤⣤⠄⠀⠀⠀⠀⠈⢿⣷⡀⠀⣰⣿⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⣿⣿⠀⠀⣿⣯⠀⠀⠀⢸⣿⠀⠀⠀⣠⣿⡟⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⢿⣧⣰⣿⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⣿⣿⠀⠀⠙⠿⣷⣦⣴⢿⣿⠄⢀⣾⣿⣿⣶⣶⣶⠆⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠘⣿⡿⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣼⡿⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀by: CaptMeelo⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠉⠁⠀⠀⠀

usage: builder.py [-h] -s  -p  -m  [-tp] [-sp] [-pp] [-b] [-d]

options:
  -h, --help  show this help message and exit
  -s          path to raw shellcode
  -p          password
  -m          shellcode execution method (e.g. 1)
  -tp         process to inject (e.g. svchost.exe)
  -sp         process to spawn (e.g. C:\\Windows\\System32\\RuntimeBroker.exe)
  -pp         parent process to spoof (e.g. explorer.exe)
  -b          binary to spoof metadata (e.g. C:\\Windows\\System32\\RuntimeBroker.exe)
  -d          domain to spoof (e.g. www.microsoft.com)

shellcode execution method:
   1          Early-bird APC Queue (requires sacrificial proces)
   2          Thread Hijacking (requires sacrificial proces)
   3          KernelCallbackTable (requires sacrificial process that has GUI)
   4          Section View Mapping
   5          Thread Suspension
   6          LineDDA Callback
   7          EnumSystemGeoID Callback
   8          FLS Callback
   9          SetTimer
   10         Clipboard

Example:

Execute builder.py and supply the necessary data.

(venv) PS C:\MalDev\laZzzy> python3 .\builder.py -s .\calc.bin -p CaptMeelo -m 1 -pp explorer.exe -sp C:\\Windows\\System32\\notepad.exe -d www.microsoft.com -b C:\\Windows\\System32\\mmc.exe

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣀⣀⣀⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⣿⣿⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣠⣤⣤⣤⣤⠀⢀⣼⠟⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⣿⣿⠀⠀⠀⠀⢀⣀⣀⡀⠀⠀⠀⢀⣀⣀⣀⣀⣀⡀⠀⢀⣼⡿⠁⠀⠛⠛⠒⠒⢀⣀⡀⠀⠀⠀⣀⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⣿⣿⠀⠀⣰⣾⠟⠋⠙⢻⣿⠀⠀⠛⠛⢛⣿⣿⠏⠀⣠⣿⣯⣤⣤⠄⠀⠀⠀⠀⠈⢿⣷⡀⠀⣰⣿⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⣿⣿⠀⠀⣿⣯⠀⠀⠀⢸⣿⠀⠀⠀⣠⣿⡟⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⢿⣧⣰⣿⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⣿⣿⠀⠀⠙⠿⣷⣦⣴⢿⣿⠄⢀⣾⣿⣿⣶⣶⣶⠆⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠘⣿⡿⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣼⡿⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀by: CaptMeelo⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠉⠁⠀⠀⠀

[+] XOR-encrypting payload with
        [*] Key:                        d3b666606468293dfa21ce2ff25e86f6

[+] AES-encrypting payload with
        [*] IV:                         f96312f17a1a9919c74b633c5f861fe5
        [*] Key:                        6c9656ed1bc50e1d5d4033479e742b4b8b2a9b2fc81fc081fc649e3fb4424fec

[+] Modifying template using
        [*] Technique:                  Early-bird APC Queue
        [*] Process to inject:          None
        [*] Process to spawn:           C:\\Windows\\System32\\RuntimeBroker.exe
        [*] Parent process to spoof:    svchost.exe

[+] Spoofing metadata
        [*] Binary:                     C:\\Windows\\System32\\RuntimeBroker.exe
        [*] CompanyName:                Microsoft Corporation
        [*] FileDescription:            Runtime Broker
        [*] FileVersion:                10.0.22621.608 (WinBuild.160101.0800)
        [*] InternalName:               RuntimeBroker.exe
        [*] LegalCopyright:             © Microsoft Corporation. All rights reserved.
        [*] OriginalFilename:           RuntimeBroker.exe
        [*] ProductName:                Microsoft® Windows® Operating System
        [*] ProductVersion:             10.0.22621.608

[+] Compiling project
        [*] Compiled executable:        C:\MalDev\laZzzy\loader\x64\Release\laZzzy.exe

[+] Signing binary with spoofed cert
        [*] Domain:                     www.microsoft.com
        [*] Version:                    2
        [*] Serial:                     33:00:59:f8:b6:da:86:89:70:6f:fa:1b:d9:00:00:00:59:f8:b6
        [*] Subject:                    /C=US/ST=WA/L=Redmond/O=Microsoft Corporation/CN=www.microsoft.com
        [*] Issuer:                     /C=US/O=Microsoft Corporation/CN=Microsoft Azure TLS Issuing CA 06
        [*] Not Before:                 October 04 2022
        [*] Not After:                  September 29 2023
        [*] PFX file:                   C:\MalDev\laZzzy\output\www.microsoft.com.pfx

[+] All done!
        [*] Output file:                C:\MalDev\laZzzy\output\RuntimeBroker.exe

Libraries Used

• kokke/tiny-AES-c
• skadro-official/skCrypter
• JustasMasiulis/lazy_importer
• JustasMasiulis/inline_syscall

Shellcode Execution Techniques

1. Early-bird APC Queue (requires sacrificial process)
2. Thread Hijacking (requires sacrificial process)
3. KernelCallbackTable (requires sacrificial process that has a GUI)
4. Section View Mapping
5. Thread Suspension
6. LineDDA Callback
7. EnumSystemGeoID Callback
8. Fiber Local Storage (FLS) Callback
9. SetTimer
10. Clipboard

Notes:

• Only works on Windows x64
• Debugging only works on Release mode
• Sometimes, KernelCallbackTable doesn't work on the first run but will eventually work afterward

Credits/References

• Authors of the libraries used
• http://undocumented.ntinternals.net/
• https://doxygen.reactos.org/index.html
• https://github.com/processhacker/phnt
• https://www.vergiliusproject.com/
• https://www.ired.team/
• https://github.com/snovvcrash/DInjector
• https://github.com/aahmad097/AlternativeShellcodeExec
• https://github.com/paranoidninja/CarbonCopy

lazzzy's Issues

error

hello i got this error when i ran cmd

MSBuild version 17.5.0+6f08c67f3 for .NET Framework
MSBUILD : error MSB1008: Only one project can be specified.
Full command line: '"D:\Microsoft Visual Studio\MSBuild\Current\Bin\MSBuild.exe" C:\Users\sasuke\Downloads\Telegram Desktop\shellcode\laZzzy-main\laZzzy-main\loader\laZzzy.sln /p:Configuration=Release /p:Platform=x64 /v:q'
Switches appended by response files:
'' came from 'D:\Microsoft Visual Studio\MSBuild\Current\Bin\MSBuild.rsp'
Switch: Desktop\shellcode\laZzzy-main\laZzzy-main\loader\laZzzy.sln

For switch syntax, type "MSBuild -help"

UnicodeEncodeError: 'gbk' codec can't encode character '\xa9' in position 634: illegal multibyte sequence

UnicodeEncodeError: 'gbk' codec can't encode character '\xa9' in position 634: illegal multibyte sequence

FileNotFoundError: [WinError 3] The system cannot find the path specified: 'C:\\laZzzy-main\\output'

Small QoL thing, adding the output folder to the Github structure would make launching the first time easier. As it is now, you have to add the folder after downloading.

Feature request: DLL Template

Hello,

Congratz on this highly organized, well-written, super useful project. It would be awesome to have a DLL template available as an alternative to the current executable template.

I might work on it myself at some point, and I will for sure submit a PR if I do, but I wanted to document the feature request anyway in case someone can work on this sooner.

Cheers,