The 'accidental' hero who helped to halt the global cyber attack
Media playback is unsupported on your device

'Accidental' hero who helped slow cyber-attack

Security researcher MalwareTech found a hidden "kill switch" among the computer code in WannaCryptor. The malware has struck organisations around the world. About a hundred countries have reported problems, with Russia thought to have been among the hardest-hit.

  • 13 May 2017