SMELLY Brown liquid seeping up through Basement Floor!

[Taylor Shapiro]

Hey guys, I was wondering if any of you had experienced something similar to what we're experiencing over here.

We painted over a smelly basement floor with regular, white Kilz. The following day, I went over to see if the paint had killed the horrible smell in the basement and noticed in one of the corners that several (30+) small blotches of brown, SMELLY, liquid had seeped up through the concrete floor. It has gathered around the perimeter of the basement now but is much more significant in this one corner.

We realized the Kilz wasn't going to cut it so we went and bought this heavy-duty, extra thick paint (can't remember the name of the stuff) and went over the floor with it. It smells like bengay actually, which is a heck of a lot better than what it previously smelled like, but a day later the brown stains reappeared in the same places.

Does anyone know what this could be?