TROJ_DLOADE.FDD

November 18, 2013
 Analysis by: Rika Joi Gregorio
 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan may be dropped by other malware.

It does not have any propagation routine.

It does not have any backdoor routine.

It does not have any information-stealing capability.

  TECHNICAL DETAILS

File Size:

143,872 bytes

File Type:

DLL

Memory Resident:

Yes

Initial Samples Received Date:

30 Oct 2013

Arrival Details

This Trojan may be dropped by the following malware:

  • TROJ_DROPPR.FDV

Installation

This Trojan drops the following files:

  • %User Temp%\wiavideo.dll - detected as TSPY_MALPLURK.FDD

(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, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)

It drops the following non-malicious file:

  • %User Temp%\~numk217{random digit}.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, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Download Routine

This Trojan accesses the following websites to download files:

  • http://blogs.yahoo.co.jp/{BLOCKED}201208/37452807.html
  • http://blogs.yahoo.co.jp/{BLOCKED}201208/1219572.html
  • http://blogs.yahoo.co.jp/{BLOCKED}201208/9592887.html

It saves the files it downloads using the following names:

  • %User Temp%\index~k{random digit}.htm

(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, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)

Information Theft

This Trojan does not have any information-stealing capability.

NOTES:

This trojan is used to load its dropped file, %User Temp%\wiavideo.dll.

It does not have rootkit capabilities.

It does not exploit any vulnerability.

  SOLUTION

Minimum Scan Engine:

9.700

FIRST VSAPI PATTERN FILE:

10.374.05

FIRST VSAPI PATTERN DATE:

30 Oct 2013

VSAPI OPR PATTERN File:

10.375.00

VSAPI OPR PATTERN Date:

30 Oct 2013

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Remove the malware/grayware file that dropped/downloaded TROJ_DLOADE.FDD

Step 3

Remove the malware/grayware file dropped/downloaded by TROJ_DLOADE.FDD

  • TSPY_MALPLURK.FDD

Step 4

Search and delete these files

[ Learn More ]
There may be some component files that are 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.
  • %User Temp%\index~k{random digit}.htm
  • %User Temp%\~numk217{random digit}.tmp

Step 5

Scan your computer with your Trend Micro product to delete files detected as TROJ_DLOADE.FDD. 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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