A victim of a Muhstik Ransomware attack paid in bitcoin (BTC) to unlock his files just to strike back and hack his hackers. In turn, he released nearly 3,000 decryption keys for other victims, along with free decryption software.
German programmer Tobias Frömel was forced to pay 0.09 BTC (USD 700) after attackers hacked into one of his publicly exposed QNAP Network