RTKT_FUZEN.U

November 14, 2012

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 Analysis by: Anthony Joe Melgarejo

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 ALIASES:

Hacktool.Rootkit (Symantec), Rootkit.Win32.Fuzen.r (Kaspersky), W32/Rootkit.DOX (Authentium), W32/Fuzen.R!tr.rkit (Fortinet), Rootkit.Win32.Fuzen (Ikarus), probably a variant of Win32/Rootkit.UIUKIU trojan (NOD32), Adware/GoodSearchNow (Panda)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:

 DAMAGE POTENTIAL:

 DISTRIBUTION POTENTIAL:

 REPORTED INFECTION:

• 
  Threat Type: Trojan
• 
  Destructiveness: No
• 
  Encrypted:
• 
  In the wild: Yes

  OVERVIEW

This Trojan may arrive bundled with malware packages as a malware component. It may be dropped by other malware.

It is a component of other malware.

It requires its main component to successfully perform its intended routine.

  TECHNICAL DETAILS

File Size:

129,536 bytes

File Type:

SYS

Initial Samples Received Date:

28 Jun 2012

Arrival Details

This Trojan may arrive bundled with malware packages as a malware component.

It may be dropped by other malware.

Installation

This Trojan is a component of other malware.

Other Details

This Trojan requires its main component to successfully perform its intended routine.

  SOLUTION

Minimum Scan Engine:

9.300

FIRST VSAPI PATTERN FILE:

9.516.05

FIRST VSAPI PATTERN DATE:

28 Jun 2012

VSAPI OPR PATTERN File:

9.517.00

VSAPI OPR PATTERN Date:

29 Jun 2012

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

Scan your computer with your Trend Micro product to delete files detected as RTKT_FUZEN.U. 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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