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RANSOMWARE ON APPLE IPHONE ANDROID
RANSOMWARE ON APPLE IPHONE CODE

RANSOMWARE ON APPLE IPHONE ANDROID

Extortion: LeakerLocker, an Android ransomware variant from 2017, locked the victim device’s screen, and collected information from it-including Chrome browser history, call history, pictures, and text messages-and threatened to expose it if a ransom was not paid.A screenshot of the CovidLock ransom note can be seen in Figure 1. This technique was also used in 2015 by the aptly named Lockerpin ransomware, and a similar technique more recently in 2020 by CovidLock.

RANSOMWARE ON APPLE IPHONE CODE

Resetting the Device PIN: In addition to using AES encryption to encrypt the files in a device’s storage directory, DoubleLocker, which emerged in 2017, also changed the device’s PIN code to prevent access to the device.While the files themselves are not encrypted, the ransom note screen will persistently overlay the screen, making the phone unusable. Hijack User Permissions: Some Android malware, including ransomware and banking trojans, abuse the permission SYSTEM_ALERT_WINDOW, which allows the application to overlay a window on top of all other phone apps.

Because this callback runs when the user presses the Home button or closes an app, this prevents the victim from dismissing the ransom note. Instead, it takes advantage of a high-priority “call” notification and overrides the onUserLeaveHint() callback to pop up the ransom note.

Abuse of Android functionalities:, a sophisticated ransomware variant that emerged in late 2020, does not encrypt a victim’s files at all.

Rather, this type of ransomware uses a few different types of techniques to deny a victim access to the device: While traditional ransomware encrypts the files on a user’s device, not all Android ransomware variants do so. Ransomware targeting Android often masquerades as a legitimate app, like the bevy of COVID-19-themed APKs that have emerged.

However, we don’t hear a lot about devastating ransomware attacks targeting smartphone operating systems, like iOS or Android. With so many devices out there, it seems like mobile would be an excellent target for ransomware threat actors. Mobile phones are certainly ubiquitous- 85% of Americans currently own a smartphone, and in 2020, 3.5 billion people owned a smartphone worldwide.