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CryptoLocker Virus

What is CryptoLockerVirus

CryptoLocker is a ransomware trojan which targets computers running Microsoft Windows, When activated, the malware encrypts certain types of files stored on local and mounted network drives using RSA public-key cryptography, with the private key stored only on the malware’s control servers. The malware then displays a message which offers to decrypt the data if a payment (through either Bitcoin or a pre-paid voucher) is made by a stated deadline, and threatens to delete the private key if the deadline passes. If the deadline is not met, the malware offers to decrypt data via an online service provided by the malware’s operators, for a significantly higher price in Bitcoin.

Source of Attack

Main source of attack is through spam emails that use social engineering tactics to try and entice opening of the attached zip file.


The severity is very high. If files are encrypted by Cryptolocker and you do not have a backup of the files, it is likely that the files are lost.


Follow information security best practices and always backup your files. Keep your systems up to date with the latest virus definitions and software patches. Refrain from opening any suspicious unsolicited emails.

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