Anti-virus solutions alone are not enough – but they still make sense
The world has become more complex, not only in politics and business but also in the field of IT security. Multi-layered defense measures are a must for companies if they want to effectively protect their IT infrastructure because cyber threats have also become much more versatile and professional. “Simple” solutions by themselves are no longer enough, yet still have their reason for being.
Until a few years ago it was relatively easy to organize the protection of your IT systems. And even today, there are still companies that rely on a few established defensive measures. Together with a firewall and a spam filter, classic AV solutions are still the standard to protect against intruders, and one of the main reasons this type of protection is generally accepted as a proven mechanism against malware. Antivirus products are highly automated and do not require extensive attention from IT administrators or security specialists, which saves money, time and effort.
Modern malware outwits classic AV products
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On the other hand, the discussion has been smoldering for some time as to whether anti-virus solutions are still effective against malware at all or perhaps do more harm than good and should therefore be abandoned. The fact is, classic products for defending against malware no longer offer adequate protection. Classic AV scanners fail to recognize all malware specimens and many specimens are not recognized at all, even after many weeks or even months.
Strengths and weaknesses in malware detection are widely distributed among the various AV providers. In addition, new types of cyber-attacks are making life increasingly difficult for classic AV scanners. Polymorphic viruses, e.g. in the form of ransomware, are evading signature-based detection mechanisms in slightly modified forms. Classic AV scanners have little or no chance against file-less attacks such as CEO fraud as these do not contain any suspicious objects for investigation.
Equally problematic are links in documents that can lead to downloads of malware. Companies that solely rely on the use of classic security solutions weigh themselves in false security. Nevertheless, the use of classic AV scanners is necessary and sensible.
Many defensive measures spoil the attacker’s success
Modern IT security solutions and suites are built on the principle of multiple protection with multiple defense methods and there are good reasons for employing multi-level protection. If the first protective measures complete part of the task in a relatively simple way, the powerful and more complex filters behind it are no longer so heavily loaded and thus perform better.
Subsequent security levels based on heuristic or behavior-based filter systems significantly improve detection performance and thus increase the chance of being spared damage by malware. These include services that detect hidden links in emails or attachments, analyze the behavior of malware in a sandbox, or hold back suspicious email attachments for a certain period of time and then check these attachments again with updated signatures.
Many companies have recognized this and rely on a multi-part defense strategy with several defensive lines in place. This way, they minimize the risk of experiencing a nasty surprise and becoming victims of a cyber-attack.
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