TROJ_MEBRATIX.B
Windows 2000, XP, Server 2003
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
It deletes the created folder.
The dropped files contain the data that it writes into the MBR (Master Boot Record). This routine enables it to start even before the operating system is loaded.
It creates the following events:
- MPMon_6934D571-115B-4830-AC5C-02A0D08179C5
- Jiangmin_WallNotify_Notify
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
TECHNICAL DETAILS
Varies
EXE
No
02 Aug 2010
Arrival Details
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Installation
This Trojan drops the following files:
- %Windows%\tasks\{random number}.job
- %Program Files%\qq{random number}.txt
(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.. %Program Files% is the default Program Files folder, usually C:\Program Files.)
It creates the following folders:
- C:\Program Files (x86)
Other System Modifications
This Trojan deletes the following folders:
- C:\Program Files (x86)
Dropping Routine
This Trojan drops the following files:
- %User Temp%\t.bat
- %Desktop%\ÍøÖ·µ¼º½.url
(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.. %Desktop% is the current user's desktop, which is usually C:\Windows\Profiles\{user name}\Desktop on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Desktop on Windows NT, and C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003.)
Download Routine
This Trojan connects to the following URL(s) to download its component file(s):
- http://union.{BLOCKED}9.cn/n.txt
It saves the files it downloads using the following names:
- %Windows%\temp.txt
(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://union.{BLOCKED}9.cn/count.aspx?i={random}
SOLUTION
8.900
7.142.05
02 Aug 2010
Step 1
For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.
Step 2
Scan your computer with your Trend Micro product and note files detected as TROJ_MEBRATIX.B
Step 3
Search and delete these files
- %Program Files%\qq{random number}.txt
- %Windows%\tasks\{random number}.job
- %User Temp%\t.bat
- %Desktop%\ÍøÖ·µ¼º½.url
Step 4
Scan your computer with your Trend Micro product to delete files detected as TROJ_MEBRATIX.B. 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.
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