TROJ_ARTIEF.CP

Malware type: TrojanDestructive: NoPlatform: Windows 2000, Windows XP, Windows Server 2003Encrypted: NoIn the wild: Yes

Overall Risk Rating: Low Damage Potential: Medium Distribution Potential: Low Reported Infection: Low

Overview

Infection Channel: Via email

This Trojan arrives as attachment to mass-mailed email messages.

It executes the dropped file(s). As a result, malicious routines of the dropped files are exhibited on the affected system.

Technical Details

File size: 195,248 bytes
File type: RTF
Initial samples received date: 12 Mar 2012
Payload: Drops files

Arrival Details

This Trojan arrives as attachment to mass-mailed email messages.

Installation

This Trojan drops the following non-malicious file:

• %User Temp%\TheSpeech.doc

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)

Dropping Routine

This Trojan drops the following files:

• %User Temp%\{random number}.tmp - detected by Trend Micro as TROJ_REDOSDR.AH

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)

It takes advantage of the following software vulnerabilities to drop malicious files:

• RTF Stack Buffer Overflow Vulnerability (CVE-2010-3333)

It executes the dropped file(s). As a result, malicious routines of the dropped files are exhibited on the affected system.

NOTES: 

It opens the dropped file %User Temp%\TheSpeech.doc in Microsoft Word to hide its malicious routines.

Solution

Minimum scan engine: 9.200
First VSAPI Pattern File: 8.832.04
First VSAPI Pattern Release Date: 12 Mar 2012
VSAPI OPR Pattern Version: 8.833.00
VSAPI OPR Pattern Release Date: 13 Mar 2012

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disableSystem Restore to allow full scanning of your computer.

Step 2

Remove malware files dropped/downloaded by TROJ_ARTIEF.CP

• TROJ_REDOSDR.AH

Step 3

Search and delete this file

[ Learn more ]

There may be some component files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden files and folders in the search result.

• %User Temp%\TheSpeech.doc

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_ARTIEF.CP If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.