If you use a phone with Android operating system, you should think twice before visiting any fishy-looking websites. Even if they promise just cute kitten videos.
Some 275 million Android phones are vulnerable to an attack that uses infected online video files to spy on the devices, according to a research paper by cyber security firm NorthBit.
The attack works on Android versions 2.2 to 4.0 and 5.0 to 5.1.