Before: No virus
After: Trojan in almost all.
Tested: Custom Icon in Nemo = 62x Trojan
Test2: Custom Icon random in nemo (not an icon related to ragnarok) = 0 virus
Test3~10: Many icons differents about ragnarok = 62x trojan
Test11: Another icon about ragnarok = ok.
So guys, this is the solution if you have this problem. Do not use the diff option "Use ragnarok icon", instead of this use "custom icon" and try to find one untill you scan find no virus.
@4144 Thanks for the good intention.