The Google Account Manager (GAM) is a critical system component responsible for authenticating users with Google services. Between Android 8 (Oreo), 9 (Pie), and 10 (Q), GAM underwent significant architectural changes, including the deprecation of the AccountManager.addAccountExplicitly() API and the introduction of scoped storage. This paper analyzes how these changes altered the attack surface for privilege escalation, authentication bypass, and the notorious "microG" and "Google Play Services replacement" modding techniques. We present a comparative vulnerability analysis, discuss real-world exploitation methods (e.g., signature spoofing), and evaluate mitigations introduced by Google. Our findings indicate that while Android 10 hardened GAM considerably, legacy compatibility modes in Android 8/9 left substantial gaps still exploited by custom ROMs and malware.
Developers have started setting minSdkVersion 29 (Android 10). Fix: You cannot bypass this natively, but you can use APK Mirror to find older versions of games (e.g., Fall Guys v1.2 instead of v2.0). Always scan with VirusTotal. android 8-9-10 gam