clamav

Clam AntiVirus is a GPL anti-virus toolkit for UNIX.

cd /tmp
wget https://slackbuilds.org/slackbuilds/13.1/system/clamav.tar.gz
tar xvzf clamav.tar.gz
cd clamav
wget http://downloads.sourceforge.net/clamav/clamav-0.95.2.tar.gz
groupadd -g 210 clamav
useradd -u 210 -d /dev/null -s /bin/false -g clamav clamav
./clamav.SlackBuild 
installpkg /tmp/clamav-0.95.2-i486-1_SBo.tgz
cd /mnt/memory
clamscan -r .