Virus writers didnt take any time off over the public holidays, and the results of their labour have made their way into our May miscellany. Trojan-PSW.Win32.VB.kq is the Greediest Trojan targeting e-payment systems. Email-Worm.Netsky.t is the most common malicious program in email traffic, with over 15% of malicious email traffic in May 2007. Backdoor.Win3232.KillFiles.ki was the most space-hungry malicious program, with a whopping 247MB.”]
Source: https://securelist.com/malware-miscellany-may-2007/30338/