Sorry to keep you waiting for the answer. I was trying to identify the thief through Huobi, cause the transaction finally ended at 1L5tLc6ayc3RXAyicHRv2c2uSNVJzoP4Yp Huobi account, that probably accumulates multiple other thefts.
Back to security questions, I can assure you that all the keys, passwords, IDs are securely stored, so no physical contact of possession possible. I never click on e-mail links, phishing sites, extensions or other potential malware source. My computer was turned off all night before I turned it on next morning when realized the hack. I have also double-checked it for viruses and access ports protection, so it's totally clean, not infected with all ports being safely closed.
I really don't know at this point what could have happened, but i'm sure it's not my fault. It may still be the case like in the link you submitted https://bitcointalk.org/index.php?topic=2488493.0