Troj/Bancos-BA is a password-stealing Trojan that targets banking websites.
Troj/Bancos-BA will monitor a user's internet access. When certain banking websites are accessed, Troj/Bancos-BA will log user activity and send the stolen details out to a Brazilian email address. In particular, the following case-insensitive banking related strings are searched for in Window title bars:
BamerIndus, bancodobrasil, Banespa, Bank, banknet, Bradesco, CAIXA, CEF,
Certificado, gerenciadorfinanceiro, HSBC, Itau, Logon, NossaCaixa, Real,
Senha, SERASA, TecladoVirtual, Vendas de Automoveis
The stolen information is stored in the "%SYSTEM%\config\cap" folder.
Troj/Bancos-BA will display one of the following fake error messages:
Reinstale ou Atualize o Acrobat Reader
"NTDLL.DLL" nao foi localizada
Estouro de memoria Kernel32.dll
Incompativel com essa versao do Windows
When first run, Troj/Bancos-BA will copy itself to the Windows system folder. In order to run automatically each time a user logs on, Troj/Bancos-BA will set the following registry entry:
HKLM\Software\Microsoft\Windows\CurrentVersion\Run
NavProtect32
<path to Trojan>
Troj/Bancos-BA will also set the following registry entries:
HKCU\Software\Microsoft\Internet Explorer\Main
Use FormSuggest
no
HKCU\Software\Microsoft\Internet Explorer\Main
FormSuggest Passwords
no
Troj/Bancos-BA will drop a keylogging application DLL named HDLL.DLL to the Windows system folder. A copy may exist named HDLL32.DLL in the user's Temporary folder. These files can be safely deleted after removing the Trojan.
Troj/Bancos-BA will attempt to terminate a number of security and anti-virus related processes.