Hi.
First of all, you should move this to Altcoin Mining, since with CPU you cannot mine Bitcoin in 2017.
Second, please keep in mind that somebody does pay for the electricity and if you get caught you may lose your job; it happened...
Now, to your question: there are a few coins that can be mined with you CPU(s), Monero, Bitsend and Magi are some of the possible choices.
One thing I can advise is a miner software:
https://bitcointalk.org/index.php?topic=1326803.0;topicseenYou will see that a lot of algorithms are supported, you will have to find out which one gives you more money, especially since most of the algorithms are also mined with GPUs with MUCH bigger processing power than your CPUs.