I have been using trezor for a couple years with no issues. then last night i checked my balance and noticed that a substantial amount in dollar value was gone in about 6 transactions. If they somehow got the seed, why not wipe me out? they only took 15 percent of my bitcoin, which still to me is a crap ton of money.

Im wondering how this could have happened. I have a good pin enabled and the trezor never leaves me. I do have a backup in a safe.

Once I noticed the missing coins, i immediately sent them to a semi safe exchange wallet and i wiped a trezor and redid it with a good passphrase, which i didn't have last time. but the thing is, the trezor never left.

First off, what could have happened? I do know that it had the original seed words of only 12 words, could that be the reason?

Im sure if screwed up somewhere, i need some guidance or help at this point. don't know what to do. Are my coins going to be safe if I move them back to a new wiped 24 seed passphrase trezor?

Ideas? I just can't figure out where I fucked up...

BTW, I use antivirus and run it regularly. still, if they had the seed words, why not wipe me out?

Im kind of stressed right now as it was a huge chunk of my money

Also, they got my 20 dollars or so of ETH but left about 15k dollars worth of ERC-20 coins which i have safely moved. everything was trezor based.