The fourth update of the worst ransomware is currently released. Cryptowall 4 came with different encryption tactics and better hiding tricks designed to trick the vicious anti-virus platforms.
For those who do not know Ransomware, they invade business and private computers with random or targeted attacks encrypting the victim's files asking for a ransom to decrypt them.
The worst malware to date is Cryptowall (the 3.0 version that was the latest before the new one). From attacks in the United States alone, fraudsters have been able to collect 325 million dollars this year, according to the Cyber Threat Alliance, surpassing the FBI data for June, which reported 18 $ million US profits for 2015.
Andra Zaharia of Heimdal Security he says ότι το Cryptowall 4.0 έρχεται “πολύ βελτιωμένο” στις επικοινωνίες και με καλύτερο code, για να μπορεί να πραγματοποιεί exloit σε περισσότερα τρωτά points.
“Cryptowall 4.0 still includes advanced malware dropper mechanisms to avoid it detection ιών, αλλά αυτή η new edition διαθέτει εξαιρετικά βελτιωμένες δυνατότητες επικοινωνίας,” αναφέρει ο Zaharia.
"It includes a modified protocol that allows it to avoid detection, even from second-generation business firewall solutions.
"This reduces detection rates significantly compared to already successful attacks from Cryptowall 3.0."
For example, the new version of the malware changes the file names as well as the contents of the file, making it more difficult for victims to find what is already encrypted.
Cryptowall 4.0 continues as its predecessors are being distributed using hacked web pages to deliver payloads including botnet componentry that further aids in malware delivery.
