Exploitation Tools

LightsOut: Disabling AMSI & ETW with an Obfuscated DLL

LightsOut will generate an obfuscated DLL that will disable AMSI & ETW while trying to evade AV. This is done by randomizing all WinAPI functions used, xor encoding strings, and utilizing basic sandbox checks. Mingw-w64 is used to compile the obfuscated C code into a DLL that can be loaded into any process where AMSI or ETW are present (i.e. PowerShell).

LightsOut is designed to work on Linux systems with python3 and mingw-w64 installed. No other dependencies are required.

Features currently include:

  • XOR encoding for strings
  • WinAPI function name randomization
  • Multiple sandbox check options
  • Hardware breakpoint bypass option
 _______________________
 _______________________
|                       |
|   AMSI + ETW          |
|                       |
|        LIGHTS OUT     |
|        _______        |
|       ||     ||       |
|       ||_____||       |
|       |/    /||       |
|       /    / ||       |
|      /____/ /-'       |
|      |____|/          |
|                       |
|          @icyguider   |
|                       |
|                     RG|
`-----------------------'
usage: lightsout.py [-h] [-m <method>] [-s <option>] [-sa <value>] [-k <key>] [-o <outfile>] [-p <pid>]

Generate an obfuscated DLL that will disable AMSI & ETW

options:
  -h, --help            show this help message and exit
  -m <method>, --method <method>
                        Bypass technique (Options: patch, hwbp, remote_patch) (Default: patch)
  -s <option>, --sandbox <option>
                        Sandbox evasion technique (Options: mathsleep, username, hostname, domain) (Default: mathsleep)
  -sa <value>, --sandbox-arg <value>
                        Argument for sandbox evasion technique (Ex: WIN10CO-DESKTOP, testlab.local)
  -k <key>, --key <key>
                        Key to encode strings with (randomly generated by default)
  -o <outfile>, --outfile <outfile>
                        File to save DLL to

Remote options:
  -p <pid>, --pid <pid>
                        PID of remote process to patch

Intended Use/Opsec Considerations

This tool was designed to be used on pentests, primarily to execute malicious powershell scripts without getting blocked by AV/EDR. Because of this, the tool is very barebones and a lot can be added to improve opsec. Do not expect this tool to completely evade detection by EDR.

Usage Examples

You can transfer the output DLL to your target system and load it into powershell various ways. For example, it can be done via P/Invoke with LoadLibrary:

Or even easier, copy powershell to an arbitrary location and side load the DLL!

Varshini

Varshini is a Cyber Security expert in Threat Analysis, Vulnerability Assessment, and Research. Passionate about staying ahead of emerging Threats and Technologies.

Recent Posts

JBDev : A Tool For Jailbreak And TrollStore Development

JBDev is a specialized development tool designed to streamline the creation and debugging of jailbreak…

19 hours ago

Kereva LLM Code Scanner : A Revolutionary Tool For Python Applications Using LLMs

The Kereva LLM Code Scanner is an innovative static analysis tool tailored for Python applications…

20 hours ago

Nuclei-Templates-Labs : A Hands-On Security Testing Playground

Nuclei-Templates-Labs is a dynamic and comprehensive repository designed for security researchers, learners, and organizations to…

22 hours ago

SSH-Stealer : The Stealthy Threat Of Advanced Credential Theft

SSH-Stealer and RunAs-Stealer are malicious tools designed to stealthily harvest SSH credentials, enabling attackers to…

22 hours ago

ollvm-unflattener : A Tool For Reversing Control Flow Flattening In OLLVM

Control flow flattening is a common obfuscation technique used by OLLVM (Obfuscator-LLVM) to transform executable…

22 hours ago

Cybersecurity – Tools And Their Function

Cybersecurity tools play a critical role in safeguarding digital assets, systems, and networks from malicious…

2 days ago