The creation of a single file can stop the attack from infecting a machine.
However, researchers have not been able to find a so-called kill switch that would prevent the crippling ransomware from spreading to other vulnerable computers.
By creating a read-only file – named perfc – and placing it within a computer’s “C:\Windows” folder, the attack will be stopped in its tracks.
“Even though it will make a machine ‘immune’,” explained computer scientist Prof Alan Woodward, “It is still a ‘carrier’ (to use the biological analogy).
“It will still continue as a platform to spread the ransomware to other machines on the same network.”For the vast majority of users, simply running an up-to-date version of Windows will be sufficient to prevent the attack taking hold, were it to infect your PC.
Researchers predict the spread of this new ransomware is likely to be much slower than last month’s WannaCry attack. Code analysis showed the new attack did not attempt to spread itself beyond the network it was placed on.
Several experts are predicting that the attack will not spread significantly further than it did on Tuesday, unless it is modified.”There is low risk of new infections more than one hour after the attack,”