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Avast! is a definition-based antivirus, as are all the other antivirus vendors currently available. All of them need to see a malware based code or executable to provide definitive protection against that specific malware.
Not really. If there ever was a definition of a signature AV it is Norton. Norton 2012 NIS/AV tests has shown it is virtually bulletproof against rouges. Why because it has finally beefed up it’s Sonar hueristic detection. Norton also has HIPS/IPS protection.
MBAM Professional, the real time version, offers protection against rouges. It retails for $25 and has a lifetime license. You can also find a better price by shopping e-tailers like Newegg. I paid $15 w/free shipping for the version I have. Be forwarned that MBAM Pro will scan your hard drive for bootleg software and the like. I view that as spyware activity but it’s a choice between the greater of two evils.
As previously stated, rouges change their footprints frequently to avoid detection. Only way to catch them is using huertistics or a host intrusion prevention system. Rouges are the No. 1 threat today because the are being created by criminal syndicates for financial extortion purposes.
Don’t get me wrong, I like Avast and it does have a lot to offer. However, if they can’t get a grip on providing adequate rouge protection, it’s future isn’t bright.