TROJ_BREDO.AB
Windows 98, ME, NT, 2000, XP, Server 2003
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.
It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.
TECHNICAL DETAILS
15,872 bytes
EXE
Yes
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:
- %Favorites%\_favdata.dat
(Note: %Favorites% is the current user's Favorites folder, which is usually C:\Windows\Favorites on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Favorites on Windows NT, and C:\Documents and Settings\{user name}\Favorites on Windows 2000, XP, and Server 2003.)
Other System Modifications
This Trojan adds the following registry entries:
HKEY_CURRENT_USER\Printers\Connections
affid = 396
HKEY_CURRENT_USER\Printers\Connections
subid = landing
HKEY_CURRENT_USER\Printers\Connections
time = 1
Download Routine
This Trojan accesses the following websites to download files:
- http://www.fastsofon.com/ms05/ad - inaccessible
- http://www.searchdear.com/ms05/ad - inaccessible
- http://{BLOCKED}e-Traffic.com/ms05/ad - TROJ_FAKEAV.RBA
It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.
SOLUTION
8.900
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
Restart in Safe Mode
Step 3
Remove malware files dropped/downloaded by TROJ_BREDO.AB
- TROJ_FAKEAV.RBA
Step 4
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\Printers\Connections
- affid=396
- affid=396
- In HKEY_CURRENT_USER\Printers\Connections
- subid=landing
- subid=landing
- In HKEY_CURRENT_USER\Printers\Connections
- time=1
- time=1
Step 5
Search and delete these files
Step 6
Scan your computer with your Trend Micro product to delete files detected as TROJ_BREDO.AB. 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.
Did this description help? Tell us how we did.