VBS_LOCKY.A

March 14, 2016
 Analysis by: Pearl Charlaine Espejo
 ALIASES:

VBS/Downloader.bp (McAfee); VBS/Dwnldr-NEX (Sophos); VBS.Downloader.Trojan (Symantec); Script.Trojan-Downloader.Agent.MW (GData)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware

This Trojan may be dropped by other malware.

It requires its main component to successfully perform its intended routine.

  TECHNICAL DETAILS

File Size:

1,552 bytes

File Type:

VBS

Memory Resident:

No

Initial Samples Received Date:

18 Feb 2016

Payload:

Downloads files

Arrival Details

This Trojan may be dropped by the following malware:

  • BAT_LOCKY

Other Details

This Trojan requires its main component to successfully perform its intended routine.

NOTES:

It is a component file of BAT_LOCKY. This script is used in the download of another malicious file.

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

12.392.09

FIRST VSAPI PATTERN DATE:

09 Mar 2016

VSAPI OPR PATTERN File:

12.393.00

VSAPI OPR PATTERN Date:

10 Mar 2016

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

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Remove malware/grayware files that dropped/downloaded VBS_LOCKY.A. (Note: Please skip this step if the threats listed below have already been removed.)

     
    • BAT_LOCKY

Step 4

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