TROJ_DLDER.AU

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 spammed email messages that contains text alleging the death of a certain famous celebrity.

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

It accesses websites to download a file detected as TROJ_BREDOLAB.XY.

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

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

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

Download Routine

This Trojan accesses the following websites to download files:

• http://{BLOCKED}.{BLOCKED}.74.161/mrmun_sgjlgdsjrthrtwg.exe - inaccessible
• http://{BLOCKED}.{BLOCKED}.112.3/outlook.exe

It saves the files it downloads using the following names:

• %Temp%\_ex-{Random}.exe

(Note: %Temp% is the Windows Temporary folder, which is usually C:\Windows\Temp or C:\WINNT\Temp.)

Trend Micro detects the dowloaded file as:

• TROJ_BREDOLAB.XY

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