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Introduction
LOGITacker, a tool developed by Rogan Dawes and Marcus Mengs for exploiting wireless input devices, recently faced issues with firmware compilation and PowerShell covert channel visibility. Daniel Scheidt addressed these challenges by implementing a stealthier PowerShell window concealment method, reducing verbosity, and introducing Docker support for firmware builds. This article explores the technical improvements and provides actionable commands for cybersecurity professionals.
Learning Objectives
- Understand LOGITacker’s covert channel enhancements.
- Learn how to hide PowerShell windows for stealthier operations.
- Utilize Docker to build firmware for the MakerDiary Dongle.
1. Hiding PowerShell Windows for Covert Channels
Command:
$t = '[DllImport("user32.dll")] public static extern bool ShowWindow(int handle, int state);';
add-type -name win -member $t -namespace native;
[native.win]::ShowWindow(([System.Diagnostics.Process]::GetCurrentProcess() | Get-Process).MainWindowHandle, 0);
Step-by-Step Guide:
- Purpose: This script hides the PowerShell window by calling the `user32.dll` API.
2. Usage:
- Paste the code into a PowerShell script or one-liner.
- Execute it before running covert channel payloads to avoid detection.
- Note: Combine this with reduced verbosity (
-WindowStyle Hidden) for full stealth.
2. Building LOGITacker Firmware with Docker
Command:
docker build -t logitacker-fw -f Dockerfile .
Step-by-Step Guide:
- Purpose: Simplifies firmware compilation for the MakerDiary Dongle.
2. Steps:
- Clone the updated LOGITacker repository.
- Navigate to the directory containing the
Dockerfile. - Run the command above to build the firmware image.
- Verification: Use `docker images` to confirm the `logitacker-fw` image is created.
3. Reducing Verbosity in Covert Channels
Command:
$ErrorActionPreference = 'SilentlyContinue'; $ProgressPreference = 'SilentlyContinue';
Step-by-Step Guide:
- Purpose: Suppresses error and progress output to avoid logs.
2. Usage:
- Add these lines to PowerShell scripts.
- Combine with `-NoProfile -NonInteractive` flags for minimal traces.
4. Integrating with P4wnP1 A.L.O.A.
Command:
// From P4wnP1_aloa HID script
hid.gadget.setPayload("PS_HIDDEN_SCRIPT");
Step-by-Step Guide:
- Purpose: Syncs LOGITacker’s PowerShell hiding method with P4wnP1’s HID scripts.
2. Steps:
- Update `helper.js` in the P4wnP1 repository.
- Deploy the modified script to Raspberry Pi Zero W devices.
5. Verifying Stealth Modifications
Command (Windows):
Get-Process -Name powershell | Select-Object MainWindowTitle
Step-by-Step Guide:
1. Purpose: Confirms PowerShell windows are hidden.
2. Usage:
- Run after executing covert channels.
- If stealth is successful, no window titles should appear.
What Undercode Say
- Key Takeaway 1: API-driven window hiding is more reliable than traditional PowerShell flags.
- Key Takeaway 2: Dockerized firmware builds reduce dependency conflicts.
Analysis:
Scheidt’s updates highlight the cat-and-mouse game in offensive security. As EDR solutions improve, attackers must refine stealth techniques. The shift toward containerized tooling (e.g., Docker) also reflects broader IT trends, ensuring reproducibility across pentesting environments. Future iterations may integrate machine learning to dynamically evade detection.
Prediction:
Covert channels will increasingly leverage legitimate APIs (e.g., user32.dll) to bypass heuristic analysis. Meanwhile, firmware toolchains will adopt cloud-native workflows for scalability. Red teams must stay ahead by automating stealth measures and hardening build pipelines.
IT/Security Reporter URL:
Reported By: Daniel Scheidt – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
