Mobile’s Latest Malware Threat: The All-in-One Android Trojan

Haythem Elmir
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A new Android Trojan — dubbed Android.Banker.L — combines the functionality of banking Trojans, keyloggers and ransomware to compromise victim devices and steal data.

As reported by Quick Heal, the latest malware threat uses multiple methods simultaneously to attack user devices. In addition to a typical Android banking Trojan, the malware contains code that enables it to forward calls, record sound, conduct keylogging and deploy ransomware. It’s also able to launch device browsers with a URL received from its command-and-control (C&C) server, which is contacted via Twitter.

Once installed, Android.Banker.L repeatedly opens the Accessibility Settings page and asks users to turn on Accessibility Service, which allows it to leverage any device permission without the need for user input.

Why the Latest Malware Threat Is So Elusive

Quick Heal noted that the code’s main Android application package (APK) is “highly obfuscated and all strings are encrypted.” When it receives the command to encrypt all device files, it renames them and then deletes the originals.

This new attack uses financial phishing overlays that are displayed after specific applications are launched. The overlays look legitimate and encourage users to provide their login credentials.

Even if users suspect their device may have been infected, the malware takes steps to prevent deletion. For example, it displays a fake alert message warning that the “system does not work correctly” and encouraging users to disable Google Play Protect. It also displays a fake system alert for “error 495” if users attempt to uninstall the app, which is listed as “sistemguncelle.”

How Companies Can Defend Against Trojans

To combat mobile Trojans, IBM security experts recommend using unified endpoint management (UEM) solutions that offer dedicated mobile threat protection (MTP) tools and include real-time over-the-air updates, automatic detection and removal of infected apps, and the ability to intelligently identify rooted, jailbroken or compromised devices.

Security experts also advise organizations to use mobile sandbox solutions to help manage the gap between known good code and known bad code that can pose a threat to the IT environment.

Finally, users should always verify the legitimacy of any unsolicited email attachments through a separate channel and delete without opening if they are unable to validate.

 

To read the original article:

https://securityintelligence.com/news/mobiles-latest-malware-threat-the-all-in-one-android-trojan/?linkId=56085231

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