TROJ_BANLOAD.VCA

This Trojan uses social engineering methods to lure users into performing certain actions that may, directly or indirectly, cause malicious routines to be performed. Specifically, it makes use of an email purportedly containing a footage of a certain Brazilian actor beating his ex-wife.

To get a one-glance comprehensive view of the behavior of this Trojan, refer to the Threat Diagram shown below.

This Trojan arrives as a file that can be downloaded from a link contained in an email message.

This Trojan may be downloaded unknowingly by a user when visiting malicious website(s).

It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

Arrival Details

This Trojan may be downloaded unknowingly by a user when visiting the following malicious website(s):

• http://{BLOCKED}as.dnsdojo.org/images/lincoln_university/notice/videos/urgentes/ ultimas/23/08/2010/noticias_dado_dalabella_viviane_sarahyba.php?0.96497

Dropping Routine

This Trojan drops the following files:

• %System Root%\networkconfing.bat - executes %System%\cttfmon.exe
• %System Root%\nsconf.bat - executes %System Root%\wakeLuan3.exe

(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

• http://{BLOCKED}.{BLOCKED}.150.47/images/top1.gif
• http://{BLOCKED}.{BLOCKED}.150.47/images/top2.gif

It saves the files it downloads using the following names:

• %System%\cttfmon.exe – detected as TROJ_DLOADE.KY
• %System Root%\wakeLuan3.exe – detected as TROJ_SWISYN.AJ

(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.. %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)

It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.