The ‘USB Thief’ Trojan Malware has the capability of stealthy attacking air-gapped or isolated computers, warns ESET security firm. The malware author has employed special programs to protect the USB Thief from being reproduced or copied, making it even harder to detect and reverse-engineer. USB Thief Trojan malware is stored either as a portable application’s plugin source or as a Dynamically Linked Library (DLL) used by the portable application. Users should not use USB storage devices from non-trustworthy sources.
Source: https://thehackernews.com/2016/03/usb-drive-malware.html