BKDR_NIOUPALE.B
Backdoor:Win32/Nioupale.A (Microsoft); Troj/Daserf-A (Sophos)
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.
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%\Common Files\System\Library
(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:
- {malware path}\msid.dat
Other Details
This backdoor connects to the following possibly malicious URL:
- http://ipad.{BLOCKED}igoku.com/image/addr.gif
- http://ipad1.{BLOCKED}igoku.com/image/addr.gif
- http://ipad2.{BLOCKED}igoku.com/image/addr.gif
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
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
Restart in Safe Mode
Step 4
Search and delete this file
- {malware path}\msid.dat
Step 5
Search and delete this folder
- %Program Files%\Common Files\System\Library
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_NIOUPALE.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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