(1) Software designed to steal personal information or perform some other illegal operation. Crimeware is malicious software that causes some misdeed to be committed. See
warez,
malware and
wares.
(2) Software that helps someone perform an unwanted or illegal act via the computer. Crimeware programs and documentation enable non-technical people to set up their own spam, virus or phishing attacks, essentially a software development kit for scoundrels. The good news is that the documentation is probably as confusing as that of most software. See
wares and
RTFM.