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Ransomware virus like CryptoWall have generated more that 180 million dollars in losses to individuals and organization worldwide. Leaving many defenseless at the hands of cybercriminals.

How do Ransomware operate?

Most crypto-viruses operate in a standard manner. They infect your computer, encrypt your files changing the extension and using AES or RSA cyphers to generate a public and private key.

After it does that, the ransomware sends the unlock information (Private Key or Public Key or both) to the C&C command and control center of the cyber criminals along with other system information and then it places a ransom note that aims to drive you into paying. Most ransom notes, set a deadline.

How do we protect your computer system from Ransomware?

According to researchers who deal with reverse engineering of malware on a daily basis, there is way of protecting your system against viruses and it is called Network sniffing.

Common network sniffers like Wireshark can be used to discover the keys to unlock files encrypted by malware. Thus, preventing organization and companies from paying heft ransoms.

Reference

Krastev, V. (2016). Use Wireshark to Decrypt Encoded Files by Ransomware. [online] How to, Technology and PC Security Forum.