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03/01/2007
Trojan.BayrobType: TrojanDiscovered: 01.03.2007 Updated: 01.03.2007 Affected systems: Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows XP AV Vendor: Symantec Description: When the Trojan horse is executed it creates the following files:
It then creates the following registry entry, so that it runs every time Windows starts: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run\"Windows Update" = "C:\WINDOWS\system32\WindowsUpdate.exe" The Trojan registers the file %System%\windowsupdate.exe as a service with the following characteristics: Service Name: Windows Update Display Name: Windows Update Startup Type: Automatic Message: Maintains your Windows up to date. If this service is stopped, your computer may become vulnerable to various security threats such as viruses. It then creates entries under the following registry subkey for the above service: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Windows Update The Trojan modifies the following registry entries to lower internet security settings: HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\"ProxyEnable" = "0" HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\"IntranetName" = "01000000" HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\"UNCAsIntranet" = "01000000" HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\"ProxyBypass" = "01000000" The Trojan also modifies entries in the following registry subkey: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections The Trojan adds the following line to the %UserProfile%\Application Data\Mozilla\Firefox\Profiles\[CURRENT PROFILE]\user.js file: user_pref("network.proxy.type", 0); It opens a back door on TCP port 80 and acts as a proxy server. It redirects the internet connection through this proxy server. The Trojan waits for a user to log onto Ebay and then silently alters the data that is shown from the following sites:
It also connects to the following URLs:
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