I added some very primitive kernel event logging to running on my phone and dumped it to an azure data store and piped to sentinel. For the first time I feel like I might actually have a chance to know if someone owned my phone.
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Since I assume most phone attacks will involve memory corruption you can grab a lot of loggin data around allocation patterns from kasan, scudo, or hardened allocator. Whether that’s going to be useful for a given exploit is anyone’s guess but you can have it!
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Grep around for 0x534e4554 in the source code, particularly in frameworks/av.
That's the tag for security events logged on failed exploitation attempts for SafetyNet to consume as part of monitoring attempts to exploit vulnerabilities.
The sub-tag is set to the bug id number.
So if you wire up those events, you can have your own version of what SafetyNet provides to Google. These aren't reported to end users by SafetyNet but rather it detects failed attempts at exploitation across the ecosystem for Google to monitor.
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It's the main basis for them saying whether or not they think a patched vulnerability is being actively exploited outside of targeted attacks. If they have this logging set up for the patched vulnerability the patched devices end up acting as canaries detecting mass exploitation.
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