The domains being used are setup and then shut down almost instantly to prevent any form of registration fee being taken. However, this advert – which appears on the Skype home screen – is actually a link to a HTML application that, although looking genuine, downloads a nasty dose of ransomware to your PC.Īnd it’s a particularly sneaky piece of ransomware as this malicious payload also runs a piece of code which deletes the downloaded application and then downloads a piece of JavaScript from a website which no longer exists. The malicious adverts that have been appearing claim that a critical Flash update is required and offers a link to this ‘critical’ update. Therefore, I’m going to delve a little deeper into what’s behind this latest attack. Ransomware is becoming increasingly more common and, as Skype is such an important communication tool, there’s a good chance that your business could find itself confronted with it. As per usual, this strain of ransomware locks the user’s computer, encrypts files and demands a ransom for unlocking the PC. PC users who are using the Microsoft Skype App have reported that fake adverts have been appearing which contain a malicious payload in the form of ransomware. Skype is a great tool for businesses to communicate with customers and partners, but now it appears that it’s being used as a delivery route for ransomware.
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