Vietnam ranked 5th in distributing spam Picture 1Photo: VNUNet . .Zip and .rar files are the most common way to distribute malicious software. However, the researchers found that the tendency to embed the exploit code directly into the source code of the message is also becoming popular. This phenomenon is called "payload poison" and appears in about 1.2% of email sent.
13.4% of this payload is Trojan, while download software and info-stealer application found in spam are 11.8% and 11.1%, respectively.
Pandex is the most popular spam program, followed by W32.IRCBot and Trojan Goldun.