Wanna Decryptor: what is the NSA 'atom bomb of ransomware' behind the NHS attack? The Wanna Decryptor ransomware, also known as wncry, is said to have been responsible for the recent NHS cyber attack NHS Digital recently confirmed that the recent NHS cyberattack used the Wanna Decryptor ransomware to infect the systems of at least 16 UK trusts. Ransomware Trojans are a type of malware designed to extort money from victims by holding files or entire computers to ransom. The ransomware typically demands payment to undo changes that the Trojan virus has made to the victim’s computer, which range from encrypting data stored on the victim’s disk to blocking normal access. Wanna Decryptor Wanna Decryptor is a so-called encryption-based ransomware also known as WannaCry or WCRY, Travis Farral, director of security strategy for Anomali told WIRED. It encrypts users files using AES and RSA encryption ciphers meaning the hackers can directly decrypt system files u