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BadBazaar Trojan: Flygram and Signal Plus Messenger 'passed' Google

Mobile Phone Viruses Telegram, Signal|Many Hong Kong people use communication apps other than WhatsApp, such as Telegram, Signal, etc. However, useful users may think that these Apps do not have complete functions and look for other apps in the Apps market that add other functions. Third-party "enhanced versions" are particularly common on Google Play; however, since these "enhanced versions" are unofficial, they may naturally contain different dangers.

According to the latest report from network security agency ESET, Signal and Telegram, which appeared as "enhanced versions" on Google Play Store and Samsung Galaxy Store (the dedicated App Store for Samsung mobile phones), were actually tampered with and implanted with the BadBazaar Trojan. Dangerous apps with viruses named “Flygram” and “Signal Plus Messenger”.

The BadBazaar Trojan comes from the Chinese hacker organization GREF. Its functions are mainly to steal personal data in the user's mobile phone, including tracking the precise location of the device, stealing call records and text messages, recording calls, using the camera to take pictures, leaking contact lists, and stealing files or In the early days of the database, it was mainly aimed at ethnic minorities in China, but its latest version has expanded its attack targets to users in multiple regions, including Ukraine, Poland, the Netherlands, Spain, Portugal, Germany, the United States, and Hong Kong.

ESET reports that FlyGram targets sensitive data such as contact lists, call logs, Google accounts and WiFi data, and also provides a dangerous backup feature that sends Telegram communication data to an attacker-controlled server.

As for Signal Plus Messenger, the user's own Signal account will be forcibly connected to the hacker's remote server through Signal's own QR code link function, and all incoming and outgoing messages will be intercepted.

Flygram and Signal Plus Messenger once bypassed the security review mechanisms of Google Play and Samsung Galaxy Store and were successfully listed on the two major App Stores.

However, after the report, the virus Apps on the Google Play Store was reported to have been deleted, but Samsung’s Galaxy Store did not follow up. Both Apps can still be found on the Galaxy Store, and will also be distributed through the Internet. spread.

However, from a user perspective, to avoid the same type of intrusion, users should avoid downloading and installing any unofficial versions of communication apps. Even if their functions are powerful, there is no guarantee that their program codes will be embedded after third-party modifications. What a trap.

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McAfee finds 43 malicious apps in Google Play

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