Analysis by: Oliver Ramirez
ALIASES:

Trojan-Downloader.VBS.Agent.maeo (KASPERSKY); VBS/Locky.d (NAI); TrojanDownloader:VBS/Schopets.H (MICROSOFT)

 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: Downloaded from the Internet, Dropped by other malware

This Trojan 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: 9,845 bytes
File Type: VBS
Memory Resident: No
Initial Samples Received Date: 19 Sep 2017
Payload: Connects to URLs/IPs, Downloads files

Arrival Details

This Trojan 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}debijles.nu/DKndhFG72?
  • http:\{BLOCKED}er.su/p66/DKndhFG72
  • http:\{BLOCKED}x.{BLOCKED}o.be/DKndhFG72?

It saves the files it downloads using the following names:

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: 9.850
FIRST VSAPI PATTERN FILE: 13.672.04
FIRST VSAPI PATTERN DATE: 21 Sep 2017
VSAPI OPR PATTERN File: 13.673.00
VSAPI OPR PATTERN Date: 22 Sep 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

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%\vmGeOn.exe -> detected as Ransom_LOCKY.TH918

Step 3

Scan your computer with your Trend Micro product to delete files detected as VBS_LOCKY.TH918. 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.


Did this description help? Tell us how we did.

Related Malware