The result? Severe hardware damage, often irreversible. A notable case in 2019 involved a man who used a USB Killer to destroy 66 computers at a college in New York, causing over $58,000 in damages.
USB Killers can affect nearly any device with a USB port—laptops, smartphones, TVs, game consoles, and more. Some systems may suffer total failure, while others, like the MacBook Air M2, may only have their ports rendered inoperative.
Originally developed by a security team in Hong Kong for testing device durability, USB Kill Sticks are now sold commercially.
The most recent version, USB Kill v4, starts at $59. A more advanced “Kit” version includes adapters for compatibility with smartphones, printers, routers, and other electronics.
What makes version 4 especially dangerous is its built-in battery. This allows it to deliver a destructive surge even if the target device is turned off, effectively bypassing USB-C and Lightning port security systems. Some models can be triggered remotely or on a timed schedule, making it incredibly difficult to trace the source of an attack.
Though these tools were initially intended for testing and security purposes by manufacturers and law enforcement, their public availability raises serious concerns. In the wrong hands, they become tools of sabotage and theft.
Defending against USB Killers isn’t easy. Even disabling USB ports in software won’t prevent voltage surges. The best strategy is to avoid plugging in unknown USB devices entirely.
For added protection, you can physically block USB ports or invest in a USB Kill Shield, which costs around $25. This shield allows normal data flow while detecting and preventing surge attacks.
Always be cautious with unfamiliar USB devices—what looks like a regular flash drive might be a silent destroyer in disguise.
