ok I found it by decompiling the game. also recorded ost from running game to enjoy wonderful music (there're several loops in game files that play randomly on top of each other):
Password is "listen" and I have no idea how you are supposed to figure it out, I think I spent about an hour during 2 separate plays months apart checking file system after anomaly. Maybe something in audio files? I didn't check spectrograms but I also didn't notice any strange sounds that usually are result of such frequency manipulations. Maybe something in e-mails, I didn't revisit them after decompiling the game.
Also game is coded to just crash after password entered (I don't think there any useful info that is given before crash).
Well, I didn't expect that to be the password. I have been trying to guess it for 3 days now XD. Each day starting a new game to see if I missed something. But I never found the word "listen", written in plain text anywhere... I thought running dskchk.exe would fix the corrupted data in the file system, and I could figure it out from there, or at least print something different than "Disk ok". Nevertheless, thank you for sharing the password! Now that I know it, I'll try and reverse engineer where it could have come from :D. Also, is there any point in the first part of the game other than to find an anomaly and then proceed to the file system?