, depending on the variant.įinally, the malware creates a file in each affected directory by linking it to a web page that contains decryption instructions that require the user to make a payment (often via bitcoin). Later it renames and encrypts the contents it has permission to modify depending on the credentials granted by the user executing the code.ĬryptoLocker uses a 2048-bit RSA key to encrypt files and renames the files by adding an extension, such as. Upon execution, CryptoLocker begins scanning the mapped network drives to which the host is connected to track down folders and documents. To the fateful question: “Should you pay the ransom?” replied Cyber Reputation and Security expert Andrea Baggio: I anticipate that the answer is by no means obvious. Similarly, you can create the next line of defense by careful and repeated investigative and corrective checks. Nonetheless, we highly recommend you reinforce access controls to limit the extent of damage caused by an infected host. The new variants have eluded antivirus and firewall technologies, and it is reasonable to expect that will soon emerge others that can circumvent preventative measures.
Malware such as CryptoLocker can enter a secure network through many vectors, including email, file sharing and download sites. Once you execute the code, it encrypts files on shared desktops and networks and holds them hostage, requiring anyone who tries to open the files to pay a ransom to decrypt them.įor this reason, CryptoLocker and its variants have become known as ransomware. CryptoLocker is a well-known malware that is particularly harmful to any organization that works with data.
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