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TROJ_DLOADER.VDJ

October 08, 2012
 Analysis by: JessaD
 PLATFORM:

Windows 98, ME, NT, 2000, XP, 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 be downloaded by other malware/grayware/spyware from remote sites. However, as of this writing, the said sites are inaccessible.

It executes then deletes itself afterward.

  TECHNICAL DETAILS

File Size:

38,480 bytes

File Type:

PE

Memory Resident:

Yes

Initial Samples Received Date:

24 Jul 2010

Payload:

Downloads files

Arrival Details

This Trojan may be downloaded by other malware/grayware/spyware from remote sites.

However, as of this writing, the said sites are inaccessible.

Installation

This Trojan executes then deletes itself afterward.

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

  • http://{5 random characters}.{BLOCKED}x.com/get_frst.php?uid={uid}
  • http://{BLOCKED}ort.waverevenue.com/rp.txt?ver=93&uid={uid}&iam={user}&st={status}

It saves the files it downloads using the following names:

  • %User Temp%\stf{number}.tmp
  • %User Temp%\v{number}.tmp

(Note: %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

Based on analysis of the codes, it has the following capabilities:

  • Sends information such as CPU information,System locale information,System BIOS information,and Video BIOS information http://{5 random characters}.{BLOCKED}x.com during its attempt at establishing communication.

  SOLUTION

Minimum Scan Engine:

8.900

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 TROJ_DLOADER.VDJ. 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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