Last week, QNAP network-attached storage (NAS) users reported being infected with DeadBolt ransomware, which was asking $1,125 in bitcoin to decrypt affected files. After QNAP addressed the issues and pushed out a forced update, many users complained of being unable to use their decryption key.
The firmware update caused the executable to be removed, which in turn removed the landing page to enter the key that was provided by DeadBolt upon paying the ransom. Emsisoft has produced a tool that enables users to run the decryption process.