Analysis by: Karl Dominguez

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW


This is the Trend Micro detection for the configuration file of the TROJ_DUQU malware family.

  TECHNICAL DETAILS

File Size: 6,750 bytes
File Type: Other
Initial Samples Received Date: 19 Oct 2011

NOTES:

This is the Trend Micro detection for the configuration file of the TROJ_DUQU malware family.

It contains the following configurations:

  • File path of component files
  • Processes where TROJ_DUQU.ENC will be injected into
  • Service registry key
  • Websites it will try to connect to for DNS checking

The configuration file analyzed has the following settings:

  • Service registry key:
    • JmiNET3
      cmi4432
  • File path of component files:
    • %System Root%\inf\cmi4432.pnf - TROJ_DUQU.ENC
    • %System Root%\inf\cmi4464.pnf - TROJ_DUQU.CFG
    • %System Root%\inf\netp191.pnf - TROJ_DUQU.ENC
    • %System Root%\inf\netp192.pnf - TROJ_DUQU.CFG
    • %System%\Drivers\cmi4432.sys - RTKT_DUQU.A
    • %System%\Drivers\jminet7.sys - RTKT_DUQU.A
  • Websites it will try to connect to for DNS checking:
    • kasperskychk.dyndns.org
    • www.microsoft.com
  • Processes wherein TROJ_DUQU.ENC will be injected into
    • explorer.exe
    • firefox.exe
    • iexplore.exe
    • pccntmon.exe

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 8.508.10
FIRST VSAPI PATTERN DATE: 20 Oct 2011
VSAPI OPR PATTERN File: 8.509.00
VSAPI OPR PATTERN Date: 20 Oct 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

Remove malware files dropped/downloaded by TROJ_DUQU.CFG

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_DUQU.CFG. 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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