BKDR_TOFSEE.USVS
Windows
Threat Type: Backdoor
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It deletes itself after execution.
TECHNICAL DETAILS
Arrival Details
This backdoor 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 backdoor creates the following folders:
- %Program Files%\Windows NT\Accessories\Microsoft
(Note: %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.)
Dropping Routine
This backdoor drops the following files:
- %Program Files%\Windows NT\Accessories\Microsoft\csviewer.exe
- %User Startup%\Outlook Messeges.lnk
(Note: %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.. %User Startup% is the current user's Startup folder, which is usually C:\Documents and Settings\{user}\Start Menu\Programs\Startup on Windows 2000 and XP, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup on Windows Vista, 7, and 8.)
Other Details
This backdoor connects to the following possibly malicious URL:
- http://info.{BLOCKED}hk.com/rss/video.php
It deletes itself after execution.
This report is generated via an automated analysis system.
SOLUTION
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
Search and delete these components
- %Program Files%\Windows NT\Accessories\Microsoft\csviewer.exe
- %User Startup%\Outlook Messeges.lnk
Step 3
Search and delete this folder
- %Program Files%\Windows NT\Accessories\Microsoft
Step 4
Scan your computer with your Trend Micro product to delete files detected as BKDR_TOFSEE.USVS. 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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