TROJ_DLOADR.AVL
Windows 2000, XP, Server 2003
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
TECHNICAL DETAILS
3,251,200 bytes
EXE
Yes
04 Aug 2010
Installation
This Trojan adds the following folders:
- C:\Documents and Settings\All Users\Application Data\Vista
It drops the following copies of itself into the affected system:
- C:\Documents and Settings\All Users\Application Data\Vista\W7.exe
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
W7.exe Nacional = C:\Documents and Settings\All Users\Application Data\Vista\W7.exe
Other System Modifications
This Trojan adds the following registry keys:
HKEY_CURRENT_USER\Software\Vistaa
=
Other Details
This Trojan connects to the following possibly malicious URL:
- http://www.{BLOCKED}nchonet.com.ar/estilos/mobile3.exe.bak
- http://www.{BLOCKED}andres.org.ar/new_img/mobile3.exe.bak
- http://www.{BLOCKED}-webdesign.de/media/mobile3.exe.bak
SOLUTION
8.900
7.370.05
08 Aug 2010
8/8/2010 12:00:00 AM
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
Delete this registry value
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- W7.exe Nacional=C:\Documents and Settings\All Users\Application Data\Vista\W7.exe
- W7.exe Nacional=C:\Documents and Settings\All Users\Application Data\Vista\W7.exe
Step 3
Delete this registry key
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- In HKEY_CURRENT_USER\Software
- Vistaa
- Vistaa
Step 4
Scan your computer with your Trend Micro product to delete files detected as TROJ_DLOADR.AVL. 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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