How Does Antivirus Work?
Antivirus is software that safeguards your devices against malware, hackers, and cybercriminals. It scans and analyzes both the data on your device and incoming information, including emails, websites, attachments, and apps. It blocks known threats and alerts you to risks. And if you do get infected, antivirus software helps you remove the malware and regain control of your device.
Even the best antivirus programs can’t stop all digital threats – but they handle a huge portion of them. They protect your most valuable assets — your data and the systems that hold it — by preventing malware attacks from taking hold on your devices. Without a solid antivirus program, you’re at risk of losing that data and facing crippling ransomware and other types of cyberattacks.
How does antivirus work?
Traditional antivirus programs (AV) use signature detection, which compares a file against a database of known malware patterns. This approach is fast and efficient, but can’t recognize brand-new malware or modified “polymorphic” variants that haven’t been cataloged yet. Modern AV solutions, like ESET’s NOD engine, use advanced heuristics to analyze code structures and behaviors to spot suspicious behavior. This type of heuristic analysis can also help detect zero-day attacks by looking for telltale traits that malware typically shares, such as modifying system registries or disabling security tools.
For the best antivirus protection, look for a solution that uses both signature detection and behavioral analysis to achieve high detection rates. Then, look for features that complement these core functions, such as cloud reputation systems, exploit blocking, and specialized ransomware and fileless malware detection.