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X97M_ECSYSTEM.B

October 09, 2012
 Modified by: Michael Cabel
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: File infector

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This file infector 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

File Size:

Varies

File Type:

XLS

Initial Samples Received Date:

10 Aug 2011

Arrival Details

This file infector arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

NOTES:

This malware checks if the opened Workbook's path is the same with Application's startup path and the file, ECSYSTEM.xls is present in the application startup path. If not, it creates the said file in the application startup path.

If the current time is between 4:44:00 PM and 4:45:00 PM, it searches for files in the folder, C:\Documents and Settings\ and displays five random file names found using a message box.

It also checks if the sheet named ECSYSTEM exists in the current workbook. If not, it creates a worksheet named ECSYSTEM in the current workbook and copy the contents of the worksheet ECSYSTEM.

  SOLUTION

Minimum Scan Engine:

8.900

FIRST VSAPI PATTERN FILE:

8.346.07

FIRST VSAPI PATTERN DATE:

10 Aug 2011

VSAPI OPR PATTERN File:

8.347.00

VSAPI OPR PATTERN Date:

10 Aug 2011

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

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.
  • %Program Files%\Microsoft Office\{Office}\XLSTART\ECSYSTEM.xls
 

Step 3

Scan your computer with your Trend Micro product to clean files detected as X97M_ECSYSTEM.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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