Despite Google's efforts, although it really seems that it does absolutely nothing to control what kind of applications reach the Google Play Store, we are continually talking about malware that gets into devices through some applications that bypass the filters of supervisors. Ransomware has been added to the malware in recent months, which, as its name suggests, hijacks our phone and asks us for a ransom in order to free it. If we don't pay it, we will never be able to access our smartphone to use it again or recover the data that were stored in it unless we do a factory reset losing all the data that we had stored.
The security company ESET has sounded the alarm when it discovered a ransomware that encrypts user data on any Android device, whether they have root access or not. This ransomware, which fortunately does not arrive through any application in the Google Play Store, has been baptized with the name DoubleLocker and can infect our device if we click on a website that suggests that we install Adobe Flash. When confirming the installation, something that we should not do at any time, the ransomware use accessibility services to lock the mobile by changing the access PIN.
Once the PIN changes, it is installed as the default launcher so that whenever we want to access the terminal, a window will appear in which we are informed that our terminal has been infected and if we want to access it again, we must go through the box and pay 0,0130 Bitcoins in less than 24 hours, although This payment does not imply that we are going to recover the access and data of our terminal.
One way to avoid this little big problem is to limit the installation of applications only to applications that come from the official Google application store, a function that is available within the security options of Android Settings, and disable the Unknown sources option.