JS_OBFUSCA.HUT

March 11, 2011
 Analysis by: Michael Cabel
 PLATFORM:

Windows 2000, XP, 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 may be dropped by other malware. It arrives as a component bundled with malware/grayware/spyware packages.

It displays fake alerts that warn users of infection. It also displays fake scanning results of the affected system. It then asks for users to purchase it once scanning is completed. If users decide to purchase the rogue product, users are directed to a certain website asking for sensitive information, such as credit card numbers.

  TECHNICAL DETAILS

File Size:

Varies

File Type:

Script

Memory Resident:

No

Initial Samples Received Date:

17 Oct 2010

Payload:

Displays fake alerts

Arrival Details

This Trojan may be dropped by other malware.

It arrives as a component bundled with malware/grayware/spyware packages.

Other Details

This Trojan displays the following fake alerts:

  • "Caution! Your computer contains a variety of suspicious programs.Your System requires immediate checking! The system will perform a fast and free check your PC for malicious programs."
  • "Your computer is infected! They can cause data lost and file corruption and need to be treat as soon as possible. Return to System Security and download it secure to your PC"

It displays fake alerts that warn users of infection. It also displays fake scanning results of the affected system. It then asks for users to purchase it once scanning is completed. If users decide to purchase the rogue product, users are directed to a certain website asking for sensitive information, such as credit card numbers.

  SOLUTION

Minimum Scan Engine:

8.900

FIRST VSAPI PATTERN FILE:

7.546.11

FIRST VSAPI PATTERN DATE:

17 Oct 2010

VSAPI OPR PATTERN File:

7.573.00

VSAPI OPR PATTERN Date:

27 Oct 2010

Step 1

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

Step 2

Close all opened browser windows

Step 3

Scan your computer with your Trend Micro product to delete files detected as JS_OBFUSCA.HUT 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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