URH (Universal Radio Hacker)

SDR & RF HardwareReady to RunLocation: /usr/local/bin/urh

Command Line Execution

Run this command in the TelcoChisel terminal to launch or execute the tool:

URH (Universal Radio Hacker) Command
urh --help

Detailed Technical Overview

Universal Radio Hacker (URH) is a complete wireless protocol investigation suite designed for rapid reverse engineering of unknown RF communications. It automates demodulation of ASK, FSK, and PSK signals, decodes packet structures, infers protocol state machines, and generates replay transmissions.

Configuration & Usage Guide

To initialize and configure URH (Universal Radio Hacker) for telecom security audits, follow these steps:

  1. 1Launch URH via its launcher or wrapper: urh
  2. 2In the Signal tab, record live RF using your connected SDR (HackRF, RTL-SDR, USRP) or open an existing capture.
  3. 3Switch to Analysis tab to view auto-detected bits, configure packet sync words, and assign fields (Length, Address, Payload, CRC).

Troubleshooting & Security Audits

URH (Universal Radio Hacker) Audit Warning
If URH crashes on launch, verify it is launched via /usr/local/bin/urh which activates the telcosec-sdr conda environment.
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Frequently Asked Questions

Can URH transmit signals for replay attacks?

Yes, using half-duplex or full-duplex SDRs like HackRF, BladeRF, or USRP, URH can replay edited packets directly from the Generator tab.

Does URH support custom CRC algorithms?

Yes, URH includes a built-in CRC calculator and brute-forcer to reverse engineer unknown checksum polynomials.

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