W2KM_BARTALEX.XXTH
TrojanDownloader:O97M/Donoff (Microsoft); Troj/DocDL-RJ (Sophos); Trojan-Downloader.MSWord.Agent.mz (Kaspersky); VBA/TrojanDownloader.Agent.VO (ESET-NOD32); W97M/Downloader.ajf (McAfee); W97M/Downloader.AA (AVG)
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.
TECHNICAL DETAILS
78,848 bytes
DOC
No
19 Jun 2015
Arrival Details
This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.
Installation
This Trojan drops the following files:
- %User Temp%\{random number}.bat
- %User Temp%\{random number}.vbs
- %User Temp%\{random number}.ps1 - for Windows Vista and above only
- %User Temp%\8.exe
(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://www.{BLOCKED}sign-wp.com/wp-content/themes/785621735.txt
- http://www.{BLOCKED}sign-wp.com/wp-content/themes/kaka.txt
- http://{BLOCKED}t.com/wp-admin/js/785621735.txt
- http://{BLOCKED}t.com/wp-admin/js/kaka.txt
- http://{BLOCKED}ic.su/5751812.jpg
- http://{BLOCKED}ic.su/5757956.jpg
SOLUTION
9.750
11.738.06
18 Jun 2015
11.739.00
18 Jun 2015
Step 1
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
Step 2
Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.
Step 3
Search and delete this file
- %User Temp%\{random number}.bat
- %User Temp%\{random number}.vbs
- %User Temp%\{random number}.ps1
- %User Temp%\8.exe
Step 4
Scan your computer with your Trend Micro product to delete files detected as W2KM_BARTALEX.XXTH. 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.
Step 5
Enable the macro virus protection in Microsoft Office Applications
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