The ClamAV was developed to be an open source (GPL) anti-virus toolkit, especially for e-mail scanning on mail gateways. It provides a number of utilities including a flexible and scalable multi-threaded daemon, a command line scanner and advanced tool for automatic database updates. The core of the package is an anti-virus engine available in a form of shared library. Copy the virus database packages to the "database" directory inside the main ClamAV folder. ClamAV Features: POSIX compliant, portable Fast scanning Detects over 750.000 viruses, worms and trojans, including Microsoft Office macro viruses, mobile malware, and other threats Built-in bytecode interpreter allows the ClamAV signature writers to create and distribute very complex detection routines and remotely enhance the scanner’s functionalityScans within archives and compressed (also protects against archive bombs), built-in support includes: Zip (including SFX) RAR (including SFX) 7Zip ARJ (including SFX) Tar CPIO Gzip Bzip2 MS OLE2 MS Cabinet Files (including SFX) MS CHM (Compiled HTML) MS SZDD compression format BinHex SIS (SymbianOS packages) AutoIt InstallShieldSupports Portable Executable (32/64-bit) & compressed or obfuscated with: AsPack UPX FSG Petite PeSpin NsPack wwpack32 MEW Upack Y0da Cryptor Supports ELF and Mach-O (both 32- and 64-bit) Supports almost all mail formatsSupport for other special formats includes: HTML RTF PDF Files encrypted with CryptFF and ScrEnc uuencode TNEF (winmail.dat) Advanced database updater with support for scripted updates, digital signatures and DNS based database version queries