However, the countermeasure against the vulnerability is not known now. ![]() Because a lot of computer peripherals (such as USB flash drive, keyboard) are connected to host system with the USB protocols, the vulnerability has a negative ripple effect. Also, an antivirus software can't detect the tampered firmware because it inspects not the firmware area but the storage area. The host system misunderstands the act of the malicious behavior as an normal behaviour for booting the USB device, so it is hard to detect the malicious code. When the BadUSB device is plugged into the USB port of a host system, a malicious code acts automatically. ![]() As the BadUSB is a vulnerability, in which a hacker tampers the firmware area of a USB flash drive.
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