![]() ![]() These issues mean increasing the power also increases the likelihood of causing chaos in the radio frequency and getting caught by the FCC, which means this tool is for surgical strikes only without using additional filters.Īll that is needed for this attack is a Raspberry Pi 3 and a wire. While this works, there are a number of issues that must be considered as a result of the way the Pi creates the transmission. The Pi's GPIO pins allow it to connect to peripherals, but in this case, pin number 4 can be pulsed using the Pi's clock to square wave oscillator. The fact that you can get started broadcasting in the radio spectrum with only a wire is incredibly useful to anyone interested in radio projects or software defined radio, but how does it work? Signal hijacking on the Pi is particularly useful against businesses playing FM radio or vehicle radio systems and can help you to influence a target's beliefs or actions by posing as a media outlet. ![]() Overpowering a station, also known as "broadcast signal intrusion," has the effect of hijacking the signal and allowing you to insert messages, songs, programming, or other seemingly legitimate information or news to support social engineering strategies. This hack is fun and useful for creating a signal with an intentionally limited range, and through some testing, I've found the signal is just powerful enough to overpower FM stations at close range.Ī do-it-yourself Raspberry Pi pirate radio. Applications like rpitx can even transmit slow-scan TV images via FM. Hobbyists have embraced the Pi FM radio hack by adding a wire as an antenna for streaming music, short-range communications, and even as an FM modem for exchanging information between devices. The ability to broadcast directly to them gives us a powerful way of speaking to someone anonymously, seemingly from a trusted source. FM radios exist in almost every car and in many businesses and homes. We'll focus on using this ability to insert our messages into the most common type of radio signals everyone has access to. Without a wire, the range is only a foot or two. The Raspberry Pi, with the addition of some free software, is capable of pulsing power on one of its general purpose input-output (GPIO) pins to transmit on any civilian FM radio frequency from around 87.5 MHz to 108 MHz. The Pi as a Software-Defined Radio Transmitter for Hacking Whatever the goal, all you need to rebroadcast signals in the radio spectrum is a $35 Raspberry Pi and a piece of wire for an antenna. ![]() Maybe you'd like to play a message to get your target to do something you want them to. Maybe you don't like the music a radio station in a particular business or vehicle is playing and you'd like to play your own. This tutorial will show you a technique to use this effect to hack civilian FM radio bands and play your social engineering payload. In fact, we can take over some radio systems without knowing any codes at all just by being closer to our target. Did they need thousands of dollars of sophisticated equipment to do so? Likely not. ![]() Whatever their goal, the attack was done by rebroadcasting a series of codes in the emergency band around 900 MHz to trigger a series of repeaters to scare the crap out of some Texans.
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