Suppose there's an interaction AB -> CD, that goes via a virtual W boson, my question is, will the virtual boson leaves a track in the detector even though it's virtual ?
No is the short answer to your question.
Think about what virtual means. A particle is virtual i.e "off mass shell" (violating energy conservation) for a time permitted by the uncertainty principle. Hence by definition it's impossible to "resolve" a virtual particle. Hence the name virtual.