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AhnLab, the top antivirus, detected 80.28%. In a Shadowserver six-month test between June and December 2011, ClamAV detected over 75.45% of all viruses tested, putting it in fifth place behind AhnLab, Avira, BitDefender and Avast. In the 2008 AV-TEST comparison of antivirus tools, ClamAV scored poorly in on-demand detection, avoiding false positives, and rootkit detection. Out of the 25 million samples tested, ClamAV scored 76.60% ranking 12 out of 19, a higher rating than some much more established competitors. In 2011, Shadowserver tested over 25 million samples against ClamAV and numerous other antivirus products. Effectiveness ĬlamAV was tested against other antivirus products on Shadowserver. The ClamAV virus database is updated at least every four hours and as of 10 February 2017 contained over 5,760,000 virus signatures with the daily update Virus DB number at 23040. Office Open XML file formats, HTML, Rich Text Format (RTF) and Portable Document Format (PDF).ELF and Portable Executable (PE) files compressed with UPX, FSG, Petite, NsPack, wwpack32, MEW, and Upack, or obfuscated with SUE, Y0da Cryptor.ZIP, RAR, Tar, Gzip, Bzip2, OLE2, Cabinet, CHM, BinHex, and SIS formats.The application features a Milter interface for sent mail and on-demand scanning. The Sourcefire VRT became Cisco Talos, and ClamAV development remains there.ĬlamAV includes a command-line scanner, automatic database updater, and a scalable multi-threaded daemon running on an anti-virus engine from a shared library. In turn, Cisco acquired Sourcefire in 2013. Upon joining Sourcefire, the ClamAV team joined the Sourcefire Vulnerability Research Team (VRT). Sourcefire, developer of intrusion detection products and the owner of Snort, announced on 17 August 2007 that it had acquired the trademarks and copyrights to ClamAV from five key developers. One of its main uses is on mail servers as a server-side email virus scanner. Both ClamAV and its updates are made available free of charge.

As of version 0.97.5, ClamAV builds and runs on Microsoft Windows. It was developed for Unix and has third party versions available for AIX, BSD, HP-UX, Linux, macOS, OpenVMS, OSF (Tru64) and Solaris. Unix, AIX, BSD, HP-UX, Linux, macOS, OpenVMS, Tru64 UNIX, WindowsĬlam AntiVirus ( ClamAV) is a free software, cross-platform antimalware toolkit able to detect many types of malware, including viruses.

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