An anonymous reader quotes a report from BleepingComputer: The popular open-source SmartTube YouTube client for Android TV was compromised after an attacker gained access to the developer's signing keys, leading to a malicious update being pushed to users. The compromise became known when multiple users reported that Play Protect, Android's built-in antivirus module, blocked SmartTube on their devices and warned them of a risk.
The developer of SmartTube, Yuriy Yuliskov, admitted that his digital keys were compromised late last week, leading to the injection of malware into the app. Yuliskov revoked the old signature and said he would soon publish a new version with a separate app ID, urging users to move to that one instead. [...] A user who reverse-engineered the compromised SmartTube version number 30.51 found that it includes a hidden native library named libalphasdk.so [VirusTotal]. This library does not exist in the public source code, so it is being injected into release builds.
[...] The library runs silently in the background without user interaction, fingerprints the host device, registers it with a remote backend, and periodically sends metrics and retrieves configuration via an encrypted communications channel. All this happens without any visible indication to the user. While there's no evidence of malicious activity such as account theft or participation in DDoS botnets, the risk of enabling such activities at any time is high.
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