Alerta Sobre Arquivos enviados por e-mail

One of the most important measures you can take to proactively combat software


attacks is to know common file extensions and the applications they’re associated with.

For example, the .scr filename extension is used for screensavers, and viruses are often

distributed through the use of these files. No legitimate user should be sending screensavers

via e‑mail to your users, and all attachments with the .scr filename extension should be

banned from entering the network.

Table 2.3, while not comprehensive, contains the most common filename extensions for

files that should and should not, as a general rule, be allowed into the network as e‑mail

attachments


Table 2.3 Common Filename Extensions for E‑mail Attachments