thanks ! it worksThat seems to be Hide My IP or similar VPN software, which isn't malware so no worries. It might have been an add-on in software you recently installed. See instructions for removing it here:
There's been enough reports of malware for OS X. Sadly OS X does get infected with malwre. You may be mistaking malware with viruses. Viruses at the moment do not exist for OS X, at least out in the wild, where as Malware does.