Threat Encyclopedia

TSPY_LEGMIR.JW

Publish date: October 08, 2012

PLATFORM:

Windows 98, ME, NT, 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 may be downloaded by other malware/grayware from remote sites.

It steals sensitive information such as user names and passwords, particularly for certain games. Stolen information may be used for profit by cybercriminals who may gain access to the information.

TECHNICAL DETAILS

File Size:

Varies

File Type:

PE

Memory Resident:

Yes

Initial Samples Received Date:

27 Feb 2010

Payload:

Steals information

Arrival Details

This spyware may be downloaded by the following malware/grayware from remote sites:

  • TROJ_SMALL.NSZ

It may be unknowingly downloaded by a user while visiting the following malicious websites:

  • http://d.{BLOCKED}ts.us/ma.exe

Installation

This spyware drops the following copies of itself into the affected system:

  • %System%\xiaosos.exe

(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)

It drops the following file(s)/component(s):

  • %System%\xiaodll0.dll

(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
loopsos = %System%\xiaosos.exe

Information Theft

This spyware steals sensitive information such as user names and passwords, particularly for certain games.

SOLUTION

Minimum Scan Engine:

8.900

VSAPI PATTERN File:

6.881.00

VSAPI PATTERN Date:

27 Feb 2010

VSAPI PATTERN Date:

2/27/2010 12:00:00 AM

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

Remove malware files dropped/downloaded by TSPY_LEGMIR.JW

Step 3

Restart in Safe Mode

[ Learn More ]

Step 4

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.
  • %System%\xiaodll0.dll

Step 5

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_LEGMIR.JW. 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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