Wednesday, 27 March, 2019

A new free tool allows you to recover PCs infected with WannaCry

Frank Williams | 23 May, 2017, 14:58

That's when a young British security researcher who goes by the name MalwareTech noticed that the ransomware was querying an unregistered domain name, which he quickly registered.

Researchers also disclosed that unlike most ransomware variants, WannaCry doesn't seem to have spread via malicious email attachments, with a number of security firms saying they were unable to find a single infected email message.

Decryptors from French Researchers May Save Many VictimsMathew J. Schwartz (euroinfosec) • May 22, 2017 WanaKiwi decrypts a Windows PC infected by WannaCry. For instance, if one of those few XP machines is operating a vital service on Britain's NHS system, that arguably has far greater implications than 100 Windows 7 users losing family photos.

However, if you've been infected by WannaCry and you haven't rebooted your computer in an attempt to get rid of it, you can give Wanakiwi a try. He noted in an update on his blog, May 19, that HTTP requests to the domain he registered showed some 416,989 systems had been hit by WannaCry as of that time.

The decryption tools carry several caveats: Affected systems must not have been powered down or rebooted. At last count, a little more than $92,000 United States has been collected, according to U.K. -based bitcoin-tracking firm Elliptical Enterprises - which means roughly 300 people have taken the bait. That exploit was revealed when the Shadow Brokers hacking group released a trove of data stolen from the NSA in April.

China begin bilateral talks over maritime dispute on Friday
The South China Sea has become the world's most contested region with China claiming nearly the entire water body. He said Xi had promised that the arbitration ruling would be discussed in future, but not now.

Even if you only have one computer, download security updates as soon as they're available - no matter what operating system you use.

Guinet, a security researcher at Paris-based Quarks Lab, published the theoretical technique for decrypting WannaCry files late Wednesday and Thursday, which Delpy, also in Paris, figured out how to turn into a practical tool to salvage files. It now works on Windows 7, XP and 2003.

Suiche's findings have been confirmed by the European Cybercrime Center - part of Europol, the EU's law enforcement intelligence agency - which says via Twitter that the tools can "recover data in some circumstances". The way it worked is WannaCry would check to see if a specific domain was active before getting busy encrypting an infected system.

It was originally believed that computers running Windows XP, the operating system Microsoft launched 16 years ago, were most at risk from Wanna Cry.

Check Point is among the cybersecurity firms warning that victims should not pay the ransom demanded by WannaCry ransomware.


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