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JS_LOCKY.SMLV

August 09, 2022
 Analysis by: Pearl Charlaine Espejo
 Modified by: Janus Agcaoili
 ALIASES:

JS:Downloader-DCW [Trj] (Avast); JS.Trojan.Nemucod.ex (Baidu); JS/TrojanDownloader.Nemucod.AFW (ESET-NOD32); JS/Nemucod.E36D!tr (Fortinet)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


As of this writing, the said sites are inaccessible.

It arrives as attachment to mass-mailed email messages.

  TECHNICAL DETAILS

File Size:

131,194 bytes

File Type:

JS

Memory Resident:

No

Initial Samples Received Date:

08 Aug 2022

Installation

This Trojan drops the following files:

  • %User Temp%\{Random String}
  • %User Temp%\{Random String}.exe

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Download Routine

As of this writing, the said sites are inaccessible.

Adware Routine

This Trojan arrives as attachment to mass-mailed email messages.

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}b.pt/40gnvp9a
  • http://{BLOCKED}32.ru/re23zcb7
  • http://www.{BLOCKED}32.ru/re23zcb7
  • http://{BLOCKED}aelectronics.co.id/xe1370n
  • http://www.{BLOCKED}aelectronics.co.id/xe1370n
  • http://{BLOCKED}bal.com/9bc9kr
  • http://{BLOCKED}ter.ru/d6tr9

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

12.688.06

FIRST VSAPI PATTERN DATE:

01 Aug 2016

VSAPI OPR PATTERN File:

12.689.00

VSAPI OPR PATTERN Date:

02 Aug 2016

Step 1

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 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

Search and delete these files

[ Learn More ]
There may be some 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.
  • %User Temp%\{Random String}
  • %User Temp%\{Random String}.exe

Step 4

Scan your computer with your Trend Micro product to delete files detected as JS_LOCKY.SMLV. 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 the following Trend Micro Support pages for more information:


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