how do i make virus signature files myself?

I know how to code in java or c++ or php. Please tell me how i can make my own virus signature.

I need some help with creating my own virus signatures. I know it is hard and not easy task. Since i know coding and im good at mathamatics, i must now know how to create one.

Aren’t the virus signatures just lines of strings which are searched for in suspected files?

Say this hex string of: 92IJI9299393929 - that is a virus sig and if that is found in file then the file will be deleted?

I also wanna develope with comodo and it does NOT HAVE TO BE PAID WORK…

I want to do it for exxtra knowlede. Thanks

rather than asking the info from a commercial entity, try the open-source community. A primer: