Troj/Dloader-KB is a downloader Trojan.
The Trojan reduces Microsoft Internet Explorer security settings and then drops and opens a file that links to a remote website.
W32/Mytob-K is a mass-mailing worm and backdoor Trojan that targets users of Internet Relay Chat programs.
W32/Mytob-K is capable of spreading through email and through various operating system vulnerabilities such as LSASS (MS04-011).
W32/Mytob-K harvests email addresses from files on the infected computer and from the Windows Address Book.