If the OP doesn't know how it happened he's at risk of it happening twice. It's process by elimination so a malware program's needed. OP didn't prove it's his cryptocurrencies so it isn't easy accepting what he's saying but I'm feeling sad if he's lost $165k.
Problem is also that is not going to be easy to determine if your device is clean or infected with something malicious.
I don't know how to prove that I own that wallet or that I lost the funds. However I did receive a voicemail from law enforcement today, I am certain I will be speaking with them tomorrow. So not sure how much more I should share. However I'd be glad to prove it's my wallet.
It's good to know that you are moving forward, You will need a lawyer who knows about cybersecurity to help you with your case, I'm sure the funds from that wallet will move so can get ready to have communication with exchanges if ever hacker moves it to these exchanges.
Checking the address it is now marked as phishing.
