VBS_DLOADR.YYSXC

July 25, 2018

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 Analysis by: Carl Maverick Pascual

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 ALIASES:

Trojan-Downloader.VBS.Agent.crh (Kaspersky) ; VBS/Agent.9278!tr.dldr (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

Infection Channel:

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.

  TECHNICAL DETAILS

File Size:

597 bytes

File Type:

VBS

Memory Resident:

Yes

Initial Samples Received Date:

05 Jul 2018

Payload:

Connects to URLs/IPs

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}.{BLOCKED}.83.148/faxid/1507832/{current time}

It does the following:

• It executes the response from the URL.

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

14.368.01

FIRST VSAPI PATTERN DATE:

08 Jul 2018

VSAPI OPR PATTERN File:

14.369.00

VSAPI OPR PATTERN Date:

09 Jul 2018

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.YYSXC. 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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