Ransomware continues to be a plague on the internet and still sets itself as the fastest growing malware family we have seen in the last number of years. In this post we describe the technical details about a newly observed campaign of the notorious Crypt0l0cker (aka TorrentLocker or Teerac) ransomware. Crypt0l0cker has gone through a long evolution, the adversaries are updating and improving the malware on a regular basis. Several indicators inside the samples we have analysed point to a new major version of the malware. We have already seen large campaigns targeting Europe and other parts of the world in 2014 and 2015. It seems to be that the actors behind these campaigns are back now and launching again massive spam attacks. This post will also give you insights about the level of sophistication this malware has reached.
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