clamav-base 0.88.4-1ubuntu2 (amd64 binary) in ubuntu feisty

 Clam AntiVirus is an anti-virus toolkit for Unix. The main purpose of this
 software is the integration with mail servers (attachment scanning). The
 package provides a flexible and scalable multi-threaded daemon in the
 clamav-daemon package, a commandline scanner in the clamav package, and a tool
 for automatic updating via Internet through the clamav-freshclam package. The
 programs are based on libclamav1, which you can use in your own software.
 .
 This package mainly manages the clamav UNIX account. It's not really
 useful without the clamav package. It also handles configuration for both
 the clamav-daemon and the clamav-milter packages.