Analysis by: Cris Nowell Pantanilla
 PLATFORM:

Windows

 OVERALL RISK RATING:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan may be dropped by other malware.

  TECHNICAL DETAILS

File Size: 900 bytes
File Type: LNK
Memory Resident: No
Initial Samples Received Date: 28 Jun 2017

Arrival Details

This Trojan may be dropped by the following malware:

Other Details

This Trojan does the following:

  • This is a shortcut files dropped by WORM_RETADUP.A to execute copies of itself. It executes the following commands:
    • cmd.exe /c start ..\WinddowsUpdateCheck\WinddowsUpdater.exe "..\WinddowsUpdateCheck\WinddowsUpdater.zip" & exit

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 13.500.09
FIRST VSAPI PATTERN DATE: 28 Jun 2017
VSAPI OPR PATTERN File: 13.501.00
VSAPI OPR PATTERN Date: 29 Jun 2017

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Remove the malware/grayware file dropped/downloaded by LNK_RETADUP.A. (Note: Please skip this step if the threat(s) listed below have already been removed.)

Step 3

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