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VBS_HTAPORN.SM1

October 09, 2012
 Analysis by: Cris Nowell Pantanilla
 ALIASES:

Trojan.HTML.StartPage.t [Kaspersky]

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • 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.

It displays pop-up advertisements.

  TECHNICAL DETAILS

File Size:

1,212 bytes

Memory Resident:

Yes

Initial Samples Received Date:

04 Jun 2011

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.

Adware Routine

This Trojan connects to the following URL(s) to display ads on the affected system:

  • http://{BLOCKED}center5185.info/set_inf.php
  • http://{BLOCKED}center5185.info/annai.php

It displays pop-up advertisements.

NOTES:
The malware injects codes to a normal process which stay in the system even if the malware is already deleted.

  SOLUTION

Minimum Scan Engine:

8.900

FIRST VSAPI PATTERN FILE:

8.202.04

FIRST VSAPI PATTERN DATE:

04 Jun 2011

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Restart in normal mode and scan your computer with your Trend Micro product for files detected as VBS_HTAPORN.SM1. 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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