VBS_LOCKY.DLDSAQE

December 01, 2016
 Analysis by: Cris Nowell Pantanilla
 Modified by: Jennifer Gumban
 ALIASES:

VBS.Downloader.B (Symantec)

 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, Downloaded from the Internet

This Trojan may arrive bundled with malware packages as a malware component. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

  TECHNICAL DETAILS

File Size:

5,311 bytes

File Type:

VBS

Memory Resident:

No

Initial Samples Received Date:

24 Nov 2016

Payload:

Connects to URLs/IPs

Arrival Details

This Trojan may arrive bundled with malware packages as a malware component.

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

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

  • http://{BLOCKED}linichm.ru/06g32f2
  • http://{BLOCKED}cairan.com/06g32f2
  • http://{BLOCKED}sso.nl/06g32f2
  • http://{BLOCKED}ahue.net/06g32f2
  • http://{BLOCKED}xmarket.pl/06g32f2
  • http://{BLOCKED}onoor.ir/06g32f2

It saves the files it downloads using the following names:

  • %User Temp%\lpaPAUSXjF.55
  • %User Temp%\lpaPAUSXjF.552 ← Ransom_HPLOCKY.SMJBA

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

It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

12.918.06

FIRST VSAPI PATTERN DATE:

24 Nov 2016

VSAPI OPR PATTERN File:

12.919.00

VSAPI OPR PATTERN Date:

25 Nov 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

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%\lpaPAUSXjF.55
%User Temp%\lpaPAUSXjF.552

Step 3

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

     Ransom_HPLOCKY.SMJBA

Step 4

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