Android Screenlockers using pseudorandomized passcode

While I’ve been occupying various workfree zones for the past few weeks, ransomware has evidently not gone away. Older versions of screenlockers often labelled  Android.Lockscreen denied Android users access to their own devices by locking the screen using a hardcoded passcode, which could be found by reverse engineering. However, as Dinesh Venkatesan reports for Symantec:

New variants of Android.Lockscreen are using pseudorandom passcodes to prevent victims from unlocking devices without paying the ransom.

Symantec’s article: Android.Lockscreen ransomware now using pseudorandom numbers – The latest Android.Lockscreen variants are using new techniques to improve their chances of obtaining ransom money.

Commentary by David Bisson for Tripwire.

David Harley


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