CRaccoon is advertised as a useful tool that will delete tracking cookies, temporary data, and other junk files. It looks like legitimate software, but it was flagged by some anti-malware engines as a potentially unwanted program (PUP), making it suspicious. Thus it would be best if you think twice before downloading and installing this software.
Rogue system tools, such as fake anti-malware software, optimizers, driver boosters, etc., usually use various scaring and persuasion techniques to convince users into buying licensed product versions. They also promote other PUPs, so your device gets infected further.