Enterprise Support – Symantec Corp. – Malware is causing network printers to print random ASCII characters

A threat is saving files into the printer spooler directory – certain printer applications are set to print any files appearing in this directory, including the binary in the form of ASCII characters. This situation may be overwhelming printers, rendering them unusable, and impacting business operations. The printing of random binary data is likely a unintended side effect of the threat.

via Enterprise Support – Symantec Corp. – Malware is causing network printers to print random ASCII characters.