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VBS_DLOADR.YYSTU

August 28, 2018
 Analysis by: Henry Alarcon Jr.
 ALIASES:

JS/Heur (AVG)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


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.

However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size:

12,116 bytes

File Type:

VBS

Memory Resident:

No

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.

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}oip.net/json/
  • http://{BLOCKED}oip.net/shutdown
  • http://{BLOCKED}m.co.id/jhbfvg7?
  • http://{BLOCKED}rarse.info/tr554.php

It does the following:

  • It executes the response from the URL.

However, as of this writing, the said sites are inaccessible.

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.716.02

FIRST VSAPI PATTERN DATE:

13 Oct 2017

VSAPI OPR PATTERN File:

13.717.00

VSAPI OPR PATTERN Date:

14 Oct 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

Restart in normal mode and scan your computer with your Trend Micro product for files detected as VBS_DLOADR.YYSTU. 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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