Security researchers have found a “vaccine” for Tuesday’s major cyber attack that swept the world.

The Discovery

Security researchers have found a “vaccine” for Tuesday’s major cyber attack that took on the entire globe. The file is named “perfc,” and it is placed within the “C:\Windows” folder in a computer. Just creating that file should stop the attack dead in its tracks.

The instructions of how to do this was posted up on Bleeping Computer’s website and has been corroborated by several security experts.

Any Problems With It?

Although this single “vaccine” file can stop a machine from being infected, the researchers still haven’t found a “kill switch” to prevent the ransomware from transferring onto other vulnerable devices.

“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 act as a platform to spread the ransomware to other machines on the same network.”

The Cyber Attack

Tuesday’s cyber attack infected millions of computers all over the world with a ransomware asking for $300. Among some of the attack’s victims are Ukraine’s central bank, Rosneft, the Russian oil company, WPP, the British advertising company, and DLA Piper, the international law company.

Experts speculate that given the fact that the ransom amount was such a small number, the intent behind the attack could have been either to cause a wider disruption or to make “a political statement.”

Researchers also predict that the new ransomware spreading around will likely be a lot slower than the major cyber attack that took place last month, called the “WannaCry” attack. This is because researchers have found that the ransomware did not try to spread past the network it initially attacked. Several experts have therefore predicted that the attack won’t spread further than it did on Tuesday unless it is further modified by hackers.

MalwareTech’s blog said: “There is low risk of new infections more than one hour after the attack.”