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X97M_LAROUX.EBM

October 08, 2012
 Analysis by: JasperM
 PLATFORM:

Windows 98, ME, NT, 2000, XP, Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: File infector

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


This file infector may be dropped by other malware. It may be unknowingly downloaded by a user while visiting malicious websites.

  TECHNICAL DETAILS

File Size:

1,207,296 bytes

File Type:

XLS

Memory Resident:

No

Initial Samples Received Date:

03 Aug 2010

Arrival Details

This file infector may be dropped by other malware.

It may be unknowingly downloaded by a user while visiting malicious websites.

Other Details

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

  • Checks for the file STARTUP.XLS in the XLSTART folder first
  • Saves the active workbook as STARTUP.XLS in the said folder if the file name does not already exist in the XLSTART folder
  • Infects Microsoft Office Excel worksheet files by creating a macro module named StartUp, which contains the virus code
  • Infects systems running on Windows 98, ME, NT, 2000, XP, and Server 2003 where Microsoft Office Excel is installed

  SOLUTION

Minimum Scan Engine:

8.900

VSAPI PATTERN File:

7.362.15

VSAPI PATTERN Date:

05 Aug 2010

VSAPI PATTERN Date:

8/5/2010 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 delete files detected as X97M_LAROUX.EBM. 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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