TROJ_GEMINI.ADQ


 ALIASES:

Win32:Downloader-MXZ (GData)

 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


  TECHNICAL DETAILS

File Size:

552,448 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

01 Mar 2012

Installation

This Trojan drops the following files:

  • %My Documents%\NOTEPAD
  • %Application Data%\SPIRITSOFT\URLSPIRIT\product.dat
  • %Application Data%\SPIRITSOFT\URLSPIRIT\bd.dat
  • %Application Data%\SPIRITSOFT\URLSPIRIT\tcfg.dat

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

Autostart Technique

This Trojan creates the following registry entries to enable automatic execution of dropped component at every system startup:

HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\
Windows\CURRENTVERSION\Run
urlspace = "%My Documents%\NOTEPAD -h"

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://bak2.{BLOCKED}itsoft.cn/urlcore/olgjcfgs.dat?q={random number}
  • http://{BLOCKED}rit.{BLOCKED}soft.cn/urlcore/olgjcfgs.dat?q={random number}
  • http://{BLOCKED}rit.{BLOCKED}irit.com/urlcore/olgjcfgs.dat?q={random number}
  • http://bak1.{BLOCKED}itsoft.cn/urlcore/olgjcfgs.dat?q={random number}

  SOLUTION

Minimum Scan Engine:

9.200

FIRST VSAPI PATTERN FILE:

8.808.06

FIRST VSAPI PATTERN DATE:

01 Mar 2012

VSAPI OPR PATTERN File:

8.809.00

VSAPI OPR PATTERN Date:

01 Mar 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

Identify and terminate files detected as TROJ_GEMINI.ADQ

[ Learn More ]
  1. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  2. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 3

Search and delete this file

[ 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.  
  • %My Documents%\NOTEPAD
  • %Application Data%\SPIRITSOFT\URLSPIRIT\product.dat
  • %Application Data%\SPIRITSOFT\URLSPIRIT\bd.dat
  • %Application Data%\SPIRITSOFT\URLSPIRIT\tcfg.dat

Step 4

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
    • urlspace = "%My Documents%\NOTEPAD -h"

Step 5

Scan your computer with your Trend Micro product to delete files detected as TROJ_GEMINI.ADQ. 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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