I'm not a reverse engineer or a white hacker but I like reading about it. Most of the malware is made for Windows OS because of the Windows' enormous market share.
Majority of information about Windows malware I get from big computer security companies' research blogs like:
Majority of the research combes down to researching malware's capabilities regarding malware persistence, anti-VM techniques and anti-debugging techniques.
Here is for example good compilation of malware's anti-debugging and anti-VM techniques:
Majority of information about Windows malware I get from big computer security companies' research blogs like:
https://www.trendmicro.com/en_us/research.html
https://www.proofpoint.com/us/blog
https://research.checkpoint.com/
https://blog.talosintelligence.com/
https://www.welivesecurity.com/en/
Microsoft also got good security research blog: https://www.microsoft.com/en-us/security/blog/
Majority of the research combes down to researching malware's capabilities regarding malware persistence, anti-VM techniques and anti-debugging techniques.
Here is for example good compilation of malware's anti-debugging and anti-VM techniques:
https://anti-debug.checkpoint.com/
https://github.com/CheckPointSW/Evasions