Analysis by: Mark Joseph Manahan
ALIASES:

TrojanDownloader:Win32/Cutwail.BS (Microsoft), Generic.grp!jq (McAfee), Trojan.Win32.Jorik.Totem.uu (Kaspersky)

 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 arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 31 Jul 2012

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Trojan drops the following copies of itself into the affected system:

  • %User Profile%\ZIGWOMZODUPD.EXE

(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
zigwomzodupd = "%User Profile%\ZIGWOMZODUPD.EXE"

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}ation.com
  • http://{BLOCKED}0k.de
  • http://{BLOCKED}rmerchantaccounts.com
  • http://{BLOCKED}captured.com
  • http://{BLOCKED}er.com
  • http://{BLOCKED}nfo.com
  • http://{BLOCKED}omotions.com
  • http://{BLOCKED}adorealestate.com
  • http://{BLOCKED}ntdesign.com
  • http://{BLOCKED}nts.net
  • http://{BLOCKED}imedia.com
  • http://{BLOCKED}hi.nl
  • http://{BLOCKED}tainmentgroup.tv
  • http://{BLOCKED}t.de
  • http://{BLOCKED}t.de
  • http://{BLOCKED}ts.eu
  • http://{BLOCKED}esales.com
  • http://{BLOCKED}wealth.com
  • http://{BLOCKED}s.com
  • http://{BLOCKED}elists.org
  • http://{BLOCKED}ore.com
  • http://{BLOCKED}you.de
  • http://{BLOCKED}esign.co.uk
  • http://{BLOCKED}esign.com
  • http://{BLOCKED}vents.nl
  • http://{BLOCKED}amily.com
  • http://{BLOCKED}reenlawncare.com
  • http://{BLOCKED}roductions.com
  • http://{BLOCKED}oft.hu
  • http://{BLOCKED}r.{BLOCKED}l.de
  • http://{BLOCKED}tion.com
  • http://{BLOCKED}tion.net
  • http://{BLOCKED}m.com
  • http://{BLOCKED}t.de
  • http://{BLOCKED}ing.com
  • http://{BLOCKED}o.com
  • http://{BLOCKED}.{BLOCKED}.79.83.adilando.com
  • http://{BLOCKED}ilty.com
  • http://{BLOCKED}fikdesign.de
  • http://{BLOCKED}aco.com
  • http://{BLOCKED}rketing.com
  • http://{BLOCKED}ioncam.com
  • http://{BLOCKED}ionist.ru
  • http://{BLOCKED}technologies.com
  • http://{BLOCKED}tantskantoordekoning.nl
  • http://{BLOCKED}ting-consulting.de
  • http://{BLOCKED}.{BLOCKED}st.com
  • http://{BLOCKED}9.{BLOCKED}s.net
  • http://www.{BLOCKED}cards.com
  • http://www.{BLOCKED}mics.com
  • http://www.{BLOCKED}nts.no
  • http://www.{BLOCKED}s.com
  • http://www.{BLOCKED}esales.com
  • http://www.{BLOCKED}ore.com
  • http://www.{BLOCKED}esign.co.uk
  • http://www.{BLOCKED}oft.hu
  • http://www.{BLOCKED}ware.nl
  • http://www.{BLOCKED}nline.com
  • http://www.{BLOCKED}tantsvirtualservices.com
  • http://www.{BLOCKED}ting4management.com
  • http://www.{BLOCKED}oep.nl
  • http://www.{BLOCKED}ika.org
  • http://www.{BLOCKED}sal100.com

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 9.298.01
FIRST VSAPI PATTERN DATE: 02 Aug 2012
VSAPI OPR PATTERN File: 9.299.00
VSAPI OPR PATTERN Date: 02 Aug 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 and note files detected as TROJ_JORIK.DMV

Step 3

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

 
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • zigwomzodupd = "%User Profile%\ZIGWOMZODUPD.EXE"

Step 4

Search and delete the file detected as TROJ_JORIK.DMV

*Note: Some component files may be hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden files and folders in the search result.

To manually delete a malware/grayware file from the affected system:

  1. Right-click Start then click Search....
  2. In the Named input box, type the name of the file that was detected earlier.
  3. In the Look In drop-down list, select My Computer then press Enter.
  4. Once located, select the file then press SHIFT+DELETE to delete it.

Step 5

Scan your computer with your Trend Micro product to delete files detected as TROJ_JORIK.DMV 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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