F-Secure
Tools
Trojan-Spy:W32/Banbra.RH
| Name : | Trojan-Spy:W32/Banbra.RH |
| Detection Names : |
Trojan-Banker.Win32.Banbra.dcn |
| Aliases : |
Trojan:Win32/VB.JH (Microsoft) Trojan-Downloader.Win32.Banload.cfn (Other) |
| Size: | 113152 |
| Category: | Malware |
| Type: | Trojan-Spy |
| Platform: | W32 |
| Date of Discovery: | September 09, 2008 |
Summary
This type of trojan secretly installs spy programs and/or keylogger programs.
Details
File System Changes
Creates these files:
• %windir%\inetinfx.exe
• %windir%\inidirx.ini
Process Changes
Creates these processes:
• %windir%\system32\netsh.exe
Creates these mutexes:
• MSIdent Logon
Network Connections
Attempts to connect to:
• smtps.uol.com.br:[...]/TCP
Registry Modifications
Sets these values:
• HKCU\Software\Microsoft\Windows\CurrentVersion\Run
MicrosoftUpgrade = C:\WINDOWS\inetinfx.exe
MicrosoftUpgrade = C:\WINDOWS\inetinfx.exe
• HKCU\Identities
Identity Ordinal = 00000002
Identity Ordinal = 00000002
• HKCU\Software\Microsoft\Internet Account Manager\Accounts
AssociatedID = \x1E\x8B\x0C\x5F\x3C\x6F\xC9\x42\xA5\xE6\x92\x95\x96\x74\x9C\xF9
AssociatedID = \x1E\x8B\x0C\x5F\x3C\x6F\xC9\x42\xA5\xE6\x92\x95\x96\x74\x9C\xF9
• HKCU\Software\Microsoft\Internet Account Manager
Server ID = 00000004
Server ID = 00000004
• HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile
EnableFirewall = 00000000
DoNotAllowExceptions = 00000000
EnableFirewall = 00000000
DoNotAllowExceptions = 00000000
• HKLM\Software\Microsoft\Tracing\FWCFG
EnableFileTracing = 00000000
EnableConsoleTracing = 00000000
FileTracingMask = FFFF0000
ConsoleTracingMask = FFFF0000
MaxFileSize = 00100000
FileDirectory = %windir%\tracing
EnableFileTracing = 00000000
EnableConsoleTracing = 00000000
FileTracingMask = FFFF0000
ConsoleTracingMask = FFFF0000
MaxFileSize = 00100000
FileDirectory = %windir%\tracing
Creates these keys:
• HKLM\Software\Microsoft\Tracing\FWCFG
Additional Details
This malware steals login information for the Bradesco Net Empresa online banking site by displaying a fake login screen to individuals attempting to access the legitimate bank site. After harvesting the login details, the malware will save that information into a file that it e-mails to a remote user. The malware is compressed with UPX 3.0.
Execution
Upon execution, this malware turns off the Windows Firewall, using a command-line tool built into Windows and normally used to change system configuration:
It will also create the following folders:
The malware then stays resident in the memory, waiting. It continually monitors the browser window titles and when the title is changed to "https://bradesconetempresa.com.br - Bradesco - Colocando voc sempre frente - Microsoft Internet Explorer", it will activate and display a fake login screen, to fool the individual into believing they have accessed the legitimate website's login screen. Information entered into the login screen's forms are saved in the inidirx.ini text file and are sent to the e-mail address master.canico[...]@gmail.com.
Execution
Upon execution, this malware turns off the Windows Firewall, using a command-line tool built into Windows and normally used to change system configuration:
• netsh firewall set opmode mode=disable
• %windir%\inetinfx.exe - copy of itself
• %windir%\inidirx.ini - text file where the malware logs the login information it retrieves
The malware then stays resident in the memory, waiting. It continually monitors the browser window titles and when the title is changed to "https://bradesconetempresa.com.br - Bradesco - Colocando voc sempre frente - Microsoft Internet Explorer", it will activate and display a fake login screen, to fool the individual into believing they have accessed the legitimate website's login screen. Information entered into the login screen's forms are saved in the inidirx.ini text file and are sent to the e-mail address master.canico[...]@gmail.com.