A UK security researcher has told the BBC how he “accidentally” halted the spread of the malicious ransomware that has affected hundreds of organisations, including the UK’s NHS.
The 22-year-old man, known by the pseudonym MalwareTech, had taken a week off work, but decided to investigate the ransomware after hearing about the global cyber-attack.
He managed to bring the spread to a halt when he found what appeared to be a “kill switch” in the rogue software’s code.
“It was actually partly accidental,” he told the BBC, after spending the night investigating. “I have not slept a wink.”
Although his discovery did not repair the damage done by the ransomware, it did stop it spreading to new computers, and he has been hailed an “accidental hero”.
“I would say that’s correct,” he told the BBC.