Sanesecurity produces add-ons signatures to help improve the ClamAV detection rate on Zero-Day malware and even on Zero-Hour malware.
Since 2006 we have provided professional quality ClamAV signatures to protect against the following email types:
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Zero hour (0hr) emailed malware has always been an issue. There are various ways of blocking dangerous attachments within zip files, such as Mailscanner/SpamAssassin/Postfix, however ClamAV can also be used to block these attachments which in some environments may be useful. Foxhole databases use the .cdb extension which uses the ClamAV engine to look inside …
Since 2006, SaneSecurity have provide hourly updated ClamAV signatures to the web community that are of professional quality and help improve ClamAV detection rate, especially on word/Excel Macro malware and other Zip/Rar/7z/Gzip archive malware.
Sanesecurity also distribute other Third Party signatures. All these signatures combined help improve ClamAV detection rate and help keep you malware free.