Modified by: Michael Cabel
 PLATFORM:

Windows 2000, Windows XP, Windows 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 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 Size: 200,704 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 16 Nov 2011

Arrival Details

This Trojan 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 files:

  • %User Profile%\{Random Folder}\unrar.dll
  • %User Profile%\{Random Folder}\hhhhhh7777ee.exe
  • %User Profile%\{Random Folder}\tproc.exe
  • %User Profile%\{Random Folder}\un.exe
  • %User Profile%\{Random Folder}\upfile.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.)

It creates the following folders:

  • %User Profile%\{Random Folder}
  • %User Temp%\jiii

(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.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • {BLOCKED}.{BLOCKED}.71.99
  • www.{BLOCKED}guesthouse.com

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 8.576.04
FIRST VSAPI PATTERN DATE: 16 Nov 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

Search and delete these folders

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result. %User Profile%\{Random Folder}
%User Temp%\jiii

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_DLODER.SM9. 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.

NOTES:

Recommendation

  1. This malware is detected and removed by the latest Trend Micro anti-malware engine and pattern. Always keep pattern files and engines up-to-date. To know more about updating your Trend Micro product’s pattern, please refer to the Trend Micro support page.
    Note: The steps apply for specific products indicated in the page.
  2. To actively detect and protect your machine, enable real-time scanning of your Trend Micro anti-malware product. Refer to the following Trend Micro support page to know more about enabling real-time scanning in your Trend Micro product:
  3. Enable firewall to protect against threats.
  4. Avoid accessing the listed malicious URLs to prevent possible re-infection.
  5. Monitor network connections for any suspicious connection or connectivity.
  6. Regularly update list of sites that are trusted.
  7. Turn off file sharing if not needed. If needed, disable anonymous access to shared folders.
  8. Avoid downloading software cracks and/or pirated applications.
  9. Clear browser cache and delete cookies regularly.
  10. Delete files in the %User Temp% folder.


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