Troj/Bancos-CH

Please follow the instructions for removing Trojans.

Change any data that may have become compromised.

Windows NT/2000/XP/2003

In Windows NT/2000/XP/2003 you will also need to edit the following registry entry for each user who ran the virus. The removal of this entry is optional in Windows 95/98/Me. Please read the warning about editing the registry.

At the taskbar, click Start|Run. Type 'Regedit' and press Return. The registry editor opens.

Before you edit the registry, you should make a backup. On the 'Registry' menu, click 'Export Registry File'. In the 'Export Range' panel, click 'All', then save your registry as Backup.

Each user has a registry area named HKEY_USERS\[code number indicating user]\. For each user locate the entry:

HKU\[code number]\Software\Microsoft\Windows\CurrentVersion\Run\
IExplorer
C:\Arquivos de programas\IExplorer.EXE

and delete it if it exists.

Close the registry editor.

Troj/Bancos-CH is a password stealing Trojan for the Windows platform that targets customers of Brazilian banks.

Once executed Troj/Bancos-CH displays a fake error message, copies itself to the root and to the Arquivos de programas folder on the C drive with the filename IExplorer.exe, and in order to be able to run automatically when Windows starts up sets the registry entry:

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
IExplorer
C:\Arquivos de programas\IExplorer.EXE

Troj/Bancos-CH monitors a user's internet access, and when certain internet banking sites are visited, the Trojan will display a fake login screen in order to trick the user into inputting their details.

Troj/Bancos-CH also creates an appstart32.inf data file in the Windows inf folder. This file is non-malicious and may be deleted.