Will update here as info is made available as much as I can.
note DO NOT post data mined info here or we will ban you. These events are designed to force the community to figure it out. Have fun, it's end of wipe time.
Part 1: Kill 15 scavs on woods and find the encrypted drive – drive is located in multiple spawns by scav camp.
Part 2: Locate the area documents are stashed (still unknown as of 10am Eastern US time)
UPDATE 1 (11:50am Eastern): Noiceguy (reputable source) has been told the quest is gated with the ARRS terminal ARG. Get to hacking PMCs.
UPDATE 2:
Pro Tip Lots of dead Chads abound at the locations. Scav in if you're into that sort of thing.
Will post more details when able. Sorry for shit mobile formatting.
Source: https://www.reddit.com/r/EscapefromTarkov/comments/1895gqu/event_questline_down_the_rabbit_hole/