With the recent kerfuffle about KeRanger, it’s interesting to recall one of its (rare) precursors on the OS X platform. In this case, there wasn’t actually a malicious executable as such, and the whole system wasn’t really locked, even though a pop-up told the victim that his or her browser was locked and that ‘ALL PC DATA WILL BE DETAINED AND CRIMINAL PROCEDURES WILL BE INITIATED AGAINST YOU IF THE FINE WILL NOT BE PAID.’ However, the pop-up did make it very difficult to quit Safari, which was probably scarier than it sounds for the victims.
The story was based on an article by Jérôme Segura for Malwarebytes. Irritatingly, there doesn’t seem to be a link in my article, but this looks like Jérôme‘s article: FBI Ransomware Now Targeting Apple’s Mac OS X Users
The present article was also published on Mac Virus.