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Cryptolocker ransomware 'infects about 250,000 PCs' since September

London, Dec. 25 : A powerful form of ransomware, Cryptolocker, has infected about quarter of a million Windows computers, a new report by security researchers has revealed.


Cryptolocker scrambles users' data and then demands a fee to unencrypt it.

According to the BBC, Dell Secureworks said that the U.S. and UK had been worst affected.

It added that the cyber-criminals responsible were now targeting home Internet users after initially focusing on professionals, the report said.

The first versions of Crytpolocker appear to have been posted to the net on 5 September.

According to the report, early examples were spread via spam emails that asked the user to click on a Zip-archived extension.

Later it was distributed via malware attached to emails claiming there had been a problem clearing a cheque.

Clicking the associated link downloaded a Trojan horse called Gameover Zeus, which in turn installed Cryptolocker onto the victim's PC, the report said.

By mid-December, Dell Secureworks said between 200,000 to 250,000 computers had been infected.

--ANI (Posted on 25-12-2013)

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