The Attachment Filter is a Plugin. That means it is not directly integrated in Spamihilator, but it can be used to block Spam mails.
This filter blocks mails that contain suspicious attachments. It looks for executable files with the following extensions:
.com, .scr, .pif, .bat, .exe, .vbs, .bas, .cmd, .cpl, .lnk, .reg, .vb, .vbe, .wsh
These files often contain viruses! So this filter is good protection against malware, but it doesn't replace your anti-virus software!