Microsoft detected new Android ransomware with new attack techniques and behavior that indicates the evolution of mobile ransomware.
As we aware ransomware uses to encrypt files, but this new ransomware doesn’t encrypt files, instead, it blocks access to devices by displaying a warning screen.
Android ransomware uses a special permission “SYSTEM_ALERT_WINDOW” to display the ransom note on top of other application and it can be dismissed by clicking any button.
This permission is to notify the user’s system alerts or errors, but the Android threat misused it to gain access over the display.
“This ransomware is the latest variant of a malware family that has undergone several stages of evolution. We expect it to churn out new variants with even more sophisticated techniques,” reads Microsoft analysis.
The malware is highly obfuscated, it has no code corresponding to the services declared in the manifest file: Main Activity, Broadcast Receivers, and Background.
“This new mobile ransomware variant is an important discovery because the malware exhibits behaviors that have not been seen before and could open doors for other malware to follow,”
“The discovery reinforces the need for comprehensive defense powered by broad visibility into attack surfaces as well as domain experts who track the threat landscape and uncover notable threats that might be hiding amidst massive threat data and signals.”
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