X97M_LAROUX.IA

October 08, 2012

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 Analysis by: Kathleen Notario

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 PLATFORM:

Windows 2000, XP, Server 2003

 OVERALL RISK RATING:

 DAMAGE POTENTIAL:

 DISTRIBUTION POTENTIAL:

 REPORTED INFECTION:

• 
  Threat Type: Trojan
• 
  Destructiveness: No
• 
  Encrypted: No
• 
  In the wild: Yes

  TECHNICAL DETAILS

File Size:

Varies

File Type:

XLS

Memory Resident:

Yes

Initial Samples Received Date:

29 Sep 2010

Other Details

Based on analysis of the codes, it has the following capabilities:

• This macro virus hooks the macro Auto_Open. It first checks for the file StartUp.xls under XLSTART directory. If it does not exist, it will then save the active workbook as StartUp.xls in the said directory.
• It infects Microsoft Excel worksheet files by creating a macro module named StartUp, which contains the virus code.
• It checks for the module StartUp in target files so that it can avoid reinfecting previous infections.

  SOLUTION

Minimum Scan Engine:

8.900

VSAPI PATTERN File:

7.502.09

VSAPI PATTERN Date:

29 Sep 2010

VSAPI PATTERN Date:

9/29/2010 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

Scan your computer with your Trend Micro product to clean files detected as X97M_LAROUX.IA. 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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