Frenchman claims cure for WannaCry-infected computers

One week after it first hit, researchers are getting a better handle on how the WannaCry ransomware spread so quickly - and judging from the early figures, the story seems to be nearly entirely about Windows 7. This is the process that generates the RSA private key. His idea involves extracting the keys to WannaCry encryption codes using prime numbers rather than attempting to break the endless string of digits behind the malicious software's full encryption key.

Yesterday, a tool called WannaKey hit Github promising free recovery of data on PCs corrupted with Wanna Decrypter.

One important thing to note here is that this application works exclusively on Windows XP, and the researcher says it hasn't been tested on a different Windows version. And it only works on Windows XP. The public key is for encrypting, and the private key is for decrypting the victim's data and files.

The group includes Adrien Guinet, who works as a security expert, Matthieu Suiche, who is an internationally known hacker, and Benjamin Delpy, who helped out by night, in his spare time, outside his day job at the Banque de France. This is where a person's luck comes into the picture, he should hope that the associated memory isn't reallocated and erased so that the prime numbers belonging to the key can be recovered. This also prevents the WannaCry to encrypt further files.

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It's crucial that customers allow their computers to automatically patch themselves when patches are issued. The WannaCry ransomware appears to only attack unpatched computers running Windows 10.

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The tool is very simple to use, and you don't even need to know how to get it to work. Windows 10 is not affected by WannaCry. He said his tool has successfully decrypted several such PCs, some that run Windows 2003 and 7.

Matt Suiche, cofounder of security firm Comae Technologies, has tested wanakiwi and reports that it works. For example, it won't work if the affected computer has been rebooted after the attack. Wanakiwi is able to successfully scour the memory of infected XP and 7 machines, extract the p and q variables that the secret key was based on, and reassemble the finished key.

Unfortunately, there are some dependencies that could prevent the WanaKiwi tool from working. It would mean a lot to us.

(Copyright © 2015. All Rights Reserved.)
 
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