The way I see it, they just gave this software, license free.
That means no copyright, no protection of their supposed intellectual property associated with it. Basically if the code can be reverse engineered, viewed, uncompiled, or whatever it should be just fine and dandy for anyone to make and publish whatever they will with it.
This should also include any software that they own that is required to run this little present.
Its probably useless code anyway, but if companies that released stuff like this risked loosing rights to everything attached to the 'gifted' software in question this practice would stop.

"I haven't eaten since early tomorrow morning."