Is publishing programs that include "cracks" on forums impermissible (haram) or permissible (halal), and does this fall under the category of "concealing knowledge"?

It is not permissible to publish programs accompanied by cracks or serial numbers to extend their validity because they are predominantly used to infringe upon the rights of program owners. The fundamental principle is that people's rights are protected and it is not permissible to violate them. Publishing these programs falls under the category of teaching what is used in the forbidden.