Could any one tell me if it's illegal to disassemble a Virus ?
I have some ... xxx.exe trojan isolated; I know what it does very well, and I am stounded

, which I want to disassemble to know which antivirus prevents it (and which not); with a solid argument; and prevent myself of fall in that trick again

.
I know that in the License of almost every software software prevents to disassemble their code.
I would like to know if any one of you knows it ...
It's illegal to disassemble a Virus code and distribute their source code to Antivirus developers?
Thanks in advance.