Hi Naviris,
Thanks for the post. The threat which caused printes to spew out ransom ASCII is Trojan.Milicenso - see Security Response's blog post: Trojan.Milicenso: A Paper Salesman’s Dream Come True
Incompatability between a printer and computer or corrupted print jobs can also cause the same garbage to appear. Rather than assume that a threat is present, I strongly recommend running this diagnostic to learn more:
How to run the Threat Analysis Scan in Symantec Help (SymHelp)
http://www.symantec.com/docs/TECH215519
If there are any suspicious files present, that should highlight them. Submit those to Security Response! &: ) If there is none, troubleshoot the printer.
Please do update this thread with your progress!
With thanks and best regards,
Mick