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I've come across at least one driver in the wild that somehow manages to act as a class filter driver without having any of the common registry values
LowerFilters in place and without modifying any of the existing device's INF files.
How is this wizardry achieved? Is this a valid practice but simply not publicly documented or most probably some "API-hookery" that runs under the radar of PatchGuard etc.?
And most importantly: how can I do that myself?
Thanks for reading, cheers
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