Trojan.BAT.AACL affects Windows based systems by trying to alter their DNS server settings. It entices users as being a legitimate updated version of the iPhone application called jailbreaking. The trojan operates without giving any hint to the user and changes his DNS server address. This makes the system vulnerable to be given instructions from various other connections. The Trojan also affects the Local area connections and wireless network connections on the system. It carefully hides its operations from the user who is left unaware of the Trojan infecting his system. The virus is also used to download many other infectious programs such as worms, fake AV software, and redirect malware in order to mess up the system’s security settings.