Zlob is a Trojan backdoor and once Zlob infects your computer it will allow attackers to control your system. Control will be from a remote machine where Spyware can be installed and personal information (credit card numbers) will be recorded without your knowledge or consent. Once Zlob gains the upper hand on your system it continues, through various commands, to weaken you PC security making it increasingly venerable to further parasite attack.

The Zlob Trojan may also install rogue anti-spyware programs (such as VirusRescue) and open excessive pop-up advertisements trying to get you to register them. Zlob is known to be affiliated with SysProtectionPage.com, Systemuptodate.com, Safetyuptodate.com, ULWindowSeek.com, ULWindowURL.com, SysUpdateCenter.com, SysNetSecurity.com, Securityuptodate.com, Guarduptodate.com, Necessaryupdates.com and dlpatch.com.