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SPYW_NETVIZORD

October 08, 2012
 Analysis by: JessaD
 ALIASES:

Realtime-Spy (Sunbelt), Downloader (Symantec)

 PLATFORM:

Windows 2000, XP, Server 2003

 OVERALL RISK RATING:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This spyware is part of the NetVizor surveillance application. It is generally used to monitor user activities including, but not limited to, the following: log keystrokes log internet, messaging and email activities take screenshots.

This spyware may be downloaded by other malware/grayware/spyware from remote sites. It may be manually installed by a user.

  TECHNICAL DETAILS

File Size:

Varies

File Type:

PE

Memory Resident:

Yes

Initial Samples Received Date:

27 Jan 2011

Arrival Details

This spyware may be downloaded by other malware/grayware/spyware from remote sites.

It may be manually installed by a user.

Installation

This spyware adds the following folders:

  • %Application Data%\{Username}

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.)

It drops the following non-malicious files:

  • %Application Data%\nvopts.dat
  • %Application Data%\emopts.dat

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.)

Autostart Technique

This spyware adds the following registry entries to enable its automatic execution at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
Srv32Win = {grayware path and file name}.exe

Other System Modifications

This spyware adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon
IgnoreShiftOveride = 1

Download Routine

This spyware connects to the following URL(s) to download its component file(s):

  • http://www.{BLOCKED}k-surveillance.com/Files/SystemSA32N.dll
  • http://www.{BLOCKED}h-web.com/spyagent/Files/libimg.dll
  • http://www.{BLOCKED}h-web.com/spyagent/Files601/YahooDLL.dll

It saves the files it downloads using the following names:

  • %WINDOWS%\sysk32n.dll
  • %WINDOWS%\imglib.dll
  • %WINDOWS%\clfct.dll

Trend Micro detects the dowloaded file as:

  • SPYW_NETVIZORD

  SOLUTION

Minimum Scan Engine:

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

Identify and terminate files detected as SPYW_NETVIZORD

[ Learn More ]
  1. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  2. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 3

Delete this registry value

[ Learn More ]

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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    • Srv32Win = {grayware path and file name}.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
    • IgnoreShiftOveride = 1

Step 4

Search and delete this folder

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result. %Application Data%\{Username}

Step 5

Search and delete this file

[ Learn More ]

There may be some component files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden files and folders in the search result.
%Application Data%\nvopts.dat
%Application Data%\emopts.dat

Step 6

Scan your computer with your Trend Micro product to delete files detected as SPYW_NETVIZORD. 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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