Wanna Decryptor, also known as WannaCry or wcry, is a specific ransomware program that locks all the data on a computer system and leaves the user with only two files: instructions on what to do next and the Wanna Decryptor program itself.
When the software is opened it tells computer users that their files have been encryted, and gives them a few days to pay up, warning that their files will otherwise be deleted. It demands payment in Bitcoin, gives instructions on how to buy it, and provides a Bitcoin address to send it to.
Most computer security companies have ransomware decryption tools that can bypass the software.
It was used in a major cyber attack that affected organisations across the world including the NHS and Telefonica in Spain.
In the mean time, harden yourselves against this threat and ensure that all systems are fully patched with the “MS17-010” security update (link below) and remind all staff to Think Before They Click when they receive any out of the ordinary emails. https://technet.microsoft.