Analysis by: Adrian Cofreros
ALIASES:

Trojan:JS/Agent.FA(Microsoft),Trojan-Downloader.JS.IstBar.ce(Kaspersky),JS/TrojanDownloader.IstBar.AI(NOD32)

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan executes when a user accesses certain websites where it is hosted.

  TECHNICAL DETAILS

File Size: Varies
File Type: JS
Memory Resident: No
Initial Samples Received Date: 18 Apr 2014

Arrival Details

This Trojan executes when a user accesses certain websites where it is hosted.

NOTES:

This malware bypasses popup blockers from Norton, Internet Explorer, and Google Toolbar. It opens a new browser window to the URL http://{BLOCKED}n.com/MzPD.

  SOLUTION

Minimum Scan Engine: 9.700
FIRST VSAPI PATTERN FILE: 7.270.05
FIRST VSAPI PATTERN DATE: 28 Jun 2010
VSAPI OPR PATTERN File: 7.271.00
VSAPI OPR PATTERN Date: 29 Jun 2010

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

Close all opened browser windows

Step 3

Scan your computer with your Trend Micro product to delete files detected as JS_ISTBAR.CN. 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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