https://www.theregister.co.uk/2019/09/19/wannacry_analysis_sophos/

Analysis WannaCry – the file-scrambling ransomware that infamously locked up Britain's NHS and a bunch of other organisations worldwide in May 2017 – is still a live-ish threat to this day, infosec researchers reckon.

By simply observing the internet for telltale signs of the malware strain – also known as WannaCrypt – Brit security software outfit Sophos spotted newer variants still doing the rounds. Thankfully, though, the bit that encrypts and holds victims' data to ransom itself becomes corrupted so the extortion isn't working as intended.