Posted by Lukasz Siewierski, Android Security & Privacy Team
We continue our PHA family highlights series with the Triada family, which was first discovered early in 2016. The main purpose of Triada apps was to install spam apps on a device that displays ads. The creators of Triada collected revenue from the ads displayed by the spam apps. The methods Triada used were complex and unusual for these types of apps. Triada apps started as rooting trojans, but as Google Play Protect strengthened defenses against rooting exploits, Triada apps were forced to adapt, progressing to a system image backdoor. However,
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