Is Cyren Zero-hour Antivirus effective (and if so, what is its effectiveness?).

Problem reported by Gabriele Maoret - SERSIS - 12/11/2019 at 6:09 AM

Resolved

Is Cyren Zero-hour Antivirus effective (and if so, what is its effectiveness?).

I did a simple test: normally on our SmarterMail server 15 to 30 viruses are captured every day by ClamAV (source: Reports -> Viruses Caught).

By disabling ClamAV and enabling the 30-day Cyren test, the report above is always left at 0 (no viruses captured).

The Cyren report (Reports -> Cyren Zero-hour Antivirus) always reports 0 "Confirmed Virus" and some (few, 1 to 5 max) "High" or "Medium".

Even the "Non Virus" remain at 0, while I have several thousand "Unknown".

So the question is: why do I have to pay for Cyren Zero-hour Antivirus if it doesn't capture anything, and instead ClamAV seems much more effective?

Gabriele Maoret - Head of SysAdmins and CISO at SERSIS

Currently manages 7 SmarterMail installations (1 in the cloud for SERSIS which provides services to a few hundred third-party email domains + 6 on-premise for customers who prefer to have their mail server in-house)

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Employee Replied

12/11/2019 at 12:04 PM

Employee Post Marked As Resolution

Gabriele,

Cyren Zero-hour is a service that provides protection in the earliest moments of malware outbreaks and continued protection as each new variant emerges. This service is intended to be used as a complement to conventional antivirus technology as an additional protection against zero-hour virus outbreaks. Because Cyren looks for new variants of malware, we unfortunately can't guarantee that existing viruses should be caught by that service.

Cyren Zero-hour should always be used in conjunction with another antivirus solution such as ClamAV.

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