If you had lost bitcoin, then I'd tell you to lower your expectations, since malware mostly send it to self-custodial hacker's wallet, but if it's Tether, then I'd argue that you can pursue it, since depositing USDT anywhere reputable requires KYC (always, IIRC?).
I don't know KYC is always required for depositing UDST but Tether has their full rights to seize USDT in any address with their smart contract.
PSA: Most Stablecoins Can Be Frozen, Even in Your Own WalletsStable coins and blacklistsVictims need to contact Tether and provide enough convincing evidence to Tether, to seize it in hands of hackers. How to get that money back, I don't know but maybe it will require more complicated steps with engagement of government.
These addresses can be added to Tether banned addresses with 1500 banned ones now.
https://duneanalytics.com/phabc/usdt---banned-addressesTether can not help here much, they saying:
"The referenced addresses where the funds were transferred to do not belong to Tether and are not controlled by Tether. We are not in a position to determine the validity of these transfers.
Please know we are not legally entitled to intervene on a wallet which is not under our control without its owner's permission or without a legal law enforcement request."