The analyzed sample of NotPetya encrypts the compromised system’s files with a 128-bit Advanced Encryption Standard (AES) algorithm during runtime. The malware then writes a text file on the “C:\” drive that includes a static Bitcoin wallet location as well as unique personal installation key intended for the victim to use when making the ransom payment and the user’s Bitcoin wallet ID. NotPetya modifies the master boot record (MBR) to enable encryption of the master file table (MFT) and the original MBR, and then reboots the system. Based on the encryption methods used, it appears unlikely that the files could be restored, even if the attacker received the victim’s unique key and Bitcoin wallet ID