Analysis by: Christopher Daniel So

 PLATFORM:

Windows 98, ME, NT, 2000, XP, Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  TECHNICAL DETAILS

File Size: 73,728 bytes
File Type: PE
Memory Resident: Yes
Initial Samples Received Date: 03 Jul 2009

Installation

This Trojan drops and executes the following files:

  • %System%\systemsp.exe

(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)

Other System Modifications

This Trojan adds the following registry entries:

HKEY_CURRENT_USER\Software\spro\
Init
Version = "1.0.0.1"

Download Routine

This Trojan accesses the following websites to download files:

  • http://up1.sidepro.co.kr/spro.exe
  • http://up1.sidepro.co.kr/version_up.txt
  • http://up1.sidepro.co.kr/sproinit.exe
  • http://up1.sidepro.co.kr/Process.txt
  • http://up1.sidepro.co.kr/systemsp.exe

It saves the files it downloads using the following names:

  • %ProgramFiles%\SPro\sproinit.exe
  • %System%\systemsp.exe

(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)

  SOLUTION

Minimum Scan Engine: 8.900
VSAPI PATTERN File: 6.242.04
VSAPI PATTERN Date: 03 Jul 2009
VSAPI PATTERN Date: 7/3/2009 12:00:00 AM

Step 1

Scan your computer with your Trend Micro product and note files detected as TROJ_DLOADER.FVQ

Step 2

Terminate a malware/grayware process

[ Learn More ]

*Note: If the detected process is not displayed in theWindows Task Manager, continue doing the next steps.

    systemsp.exe

Step 3

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. %System%\systemsp.exe
%ProgramFiles%\SPro\sproinit.exe

Step 4

Delete this registry key

[ 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
    • spro

Step 5

Scan your computer with your Trend Micro product to delete files detected as TROJ_DLOADER.FVQ. 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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