Several days ago we received a complaint about javascrpt.ru. After a bit of research, we found that it tries to mimic ajax.google.com and jquery, but the code is an obfuscated/packed redirector.
After removing two layers of obfuscation, we found a list of conditions checking visitors’ user Agent. From these conditions. we got a clue and focused on mobile devices.
Got a brand new smartphone and want to be protected from all the dangerous malware that’s out there? So you go and get some Android antivirus software. But, what you don’t know is that you just got tricked. And, it’s going to cost you some money. Yes, even if you downloaded if for free.
The latest trend in Android malware is to hide behind something that seems to be legit. Guys at GFI Labs pointed that out, so let’s take a closer look behind the scenes and add some interesting info from the AVAST Virus Lab’s perspective. Imagine yourself as a virus maker. You create an app that will do something evil like steal or delete people’s texts (you’re a nice virus maker), or you want to milk the cow even more and you create an app that’s going to get you some money from the victim by making it silently send text messages to premium-rate phone numbers.
But, how do you spread your evil milking machine among Android users? Just take a look at the apps that are already popular and trusted, like Angry Birds, Opera Browser, or even better, an antivirus app! What can feel safer than installing antivirus on your phone, right? So you take your evil app and make it look, for example, like avast! Mobile Security or any other antivirus suite. Then you make it available for free download, easy to find, placed on a web page that is not guarded like the Play Store, Amazon App Store, or any other genuine Android market. Most of the people only download apps from these genuine stores, but there are always some of them that somehow get tricked or that are just unlucky and run into some fraudulent apps like the one I’m talking about.
Let’s take a closer look at one of the cases. Android:FakeInst-AB Read more…