W97M_SHELLHIDE.B

This malware leverages a macro-enabled word document as a malicious spam attachment in order to infect machines with a backdoor. The spammed email message is related to payment remittance.

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

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

• http://{BLOCKED}cu.com/{BLOCKED}ek/sb01ff.exe

It saves the files it downloads using the following names:

• %Application Data%\APWARQFJESX.exe - detected as BKDR_NEUREVT.DCM

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)

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

NOTES:

This document has a malicious macro script that downloads and executes a malicious file when the document is opened.