TROJ_VB.JJX

November 02, 2012
 ALIASES:

Trojan:Win32/VB.ADE (Microsoft); [000133d0.EXE\000133d0.EXE]:Generic AdClicker.p (McAfee); Trojan.Gen (Symantec); PAK:UPX, Trojan-Clicker.Win32.VB.gfi (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan.VB.Agent.HO (FSecure)

 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

  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:

9,580,544 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

02 Nov 2012

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.

Other System Modifications

This Trojan adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Toolbar\WebBrowser
ITBar7Layout = "{random values}"

It modifies the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Toolbar\WebBrowser
ITBarLayout = "{random values}"

(Note: The default value data of the said registry entry is {random values}.)

Dropping Routine

This Trojan drops the following files:

  • %System Root%\b.txt
  • %System Root%\d.txt
  • %Favorites%\×îм«Æ·ÂÌÉ«ºÃµÄµçÓ°¿âÃâ·Ñ.¸ßÇå¸ßËÙ£¡ÌìÌì¸üÐÂ!!.html
  • %Favorites%\Öйú¸£Àû²ÊƱ£¬ÌåÓý²ÊƱµÄͶעÖÐÐÄ.²ÊƱ´óÓ®¼Ò!.html
  • %Favorites%\×îÐÂÔÚÏßС˵Ãâ·ÑµÄÔĶÁ.·á¸»ÄÚÈÝËٶȿìµÄС˵վ!.html
  • %Favorites%\ÌÔ±¦Íø - ÌÔ£¡ÎÒϲ»¶.html
  • %Favorites%\45575.comÔÚÏßµÄСÓÎÏ·.×îºÃÍæ×îÐÂ×î¿ì¿á³¬¼¶Ð¡ÓÎÏ·!.html
  • %User Profile%\Favoritesµ±µ±Íø¡ªÍøÉϹºÎïÖÐÐÄ.html
  • %Favorites%\׿ԽÑÇÂíÑ·ÍøÉϹºÎïͼÊ飬ÊÖ»ú£¬ÊýÂ룬¼Òµç£¬»¯×±Æ·£¬ÖÓ±í£¬Ê×ÊεÈÔÚÏßÏúÊÛ.html
  • %Favorites%\¿´¿´µçÊÓ¾çÔÚÏß´óÈ«,,,×îºÃÂÌÉ«×îиßËÙÃâ·ÑµçÊÓ¾çÍøÕ¾!.html
  • %Favorites%\¼õ·Ê£¡¿ìµ½ÈÃÄã&¼â½Ð£¡ºþÄÏÎÀÊÓÍƼö×óÐýÈâ¼î¼õ·Ê!.html
  • %Favorites%\°¬³ÈÍŹº - ¾«Æ·ÍŹºÃ¿Ò»Ì칺ÎïÍŹº´òÕÛ!.html
  • %Favorites%\ÃÀÅ®·áÐØ´óÃؾ÷-20ÌìÄÚѸËÙÔö´ó´ó´ó!.html
  • %Favorites%\°¬³ÈÅ®×°--×îÃÀÀöʱÉеÄÅ®×°Æ·ÅÆ.ÃÀÅ®ÂòÒ£¬Ãëɱ°¬³ÈÅ®×°!!.html
  • %Favorites%\Á´½Ó\ÍøÖ·µ¼º½.html
  • %Favorites%\Á´½Ó\¸£²ÊÌå²Ê.html
  • %Favorites%\Á´½Ó\¡ô ÌÔ ±¦ Íø ¡ô.html
  • %Favorites%\Á´½Ó\ºÃÍæСÓÎÏ·.html
  • %Favorites%\Á´½Ó\µ±µ±Íø.html
  • %Favorites%\Á´½Ó\׿ԽÍø.html
  • %Favorites%\Á´½Ó\¿´µçÊÓ¾ç.html
  • %Favorites%\Á´½Ó\С˵Íø.html
  • %Favorites%\Á´½Ó\µ¥»úÓÎÏ·.html
  • %Favorites%\Á´½Ó\ÍøÂçµçÊÓ.html
  • %Favorites%\Á´½Ó\×î¿ìµçÓ°.html
  • %System Root%\taobao.ico
  • %System Root%\game.ico
  • %Desktop%\ÌÔ±¦.url
  • %Desktop%\ÔÚÏßСÓÎÏ·.url

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.300

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

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\Internet Explorer\Toolbar\WebBrowser
    • ITBar7Layout = "{random values}"

Step 3

Restore this modified 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\Internet Explorer\Toolbar\WebBrowser
    • From: ITBarLayout = "{random values}"
      To: ITBarLayout = ""{random values}""

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.
  • %System Root%\b.txt
  • %System Root%\d.txt
  • %Favorites%\×îм«Æ·ÂÌÉ«ºÃµÄµçÓ°¿âÃâ·Ñ.¸ßÇå¸ßËÙ£¡ÌìÌì¸üÐÂ!!.html
  • %Favorites%\Öйú¸£Àû²ÊƱ£¬ÌåÓý²ÊƱµÄͶעÖÐÐÄ.²ÊƱ´óÓ®¼Ò!.html
  • %Favorites%\×îÐÂÔÚÏßС˵Ãâ·ÑµÄÔĶÁ.·á¸»ÄÚÈÝËٶȿìµÄС˵վ!.html
  • %Favorites%\ÌÔ±¦Íø - ÌÔ£¡ÎÒϲ»¶.html
  • %Favorites%\45575.comÔÚÏßµÄСÓÎÏ·.×îºÃÍæ×îÐÂ×î¿ì¿á³¬¼¶Ð¡ÓÎÏ·!.html
  • %User Profile%\Favoritesµ±µ±Íø¡ªÍøÉϹºÎïÖÐÐÄ.html
  • %Favorites%\׿ԽÑÇÂíÑ·ÍøÉϹºÎïͼÊ飬ÊÖ»ú£¬ÊýÂ룬¼Òµç£¬»¯×±Æ·£¬ÖÓ±í£¬Ê×ÊεÈÔÚÏßÏúÊÛ.html
  • %Favorites%\¿´¿´µçÊÓ¾çÔÚÏß´óÈ«,,,×îºÃÂÌÉ«×îиßËÙÃâ·ÑµçÊÓ¾çÍøÕ¾!.html
  • %Favorites%\¼õ·Ê£¡¿ìµ½ÈÃÄã&¼â½Ð£¡ºþÄÏÎÀÊÓÍƼö×óÐýÈâ¼î¼õ·Ê!.html
  • %Favorites%\°¬³ÈÍŹº - ¾«Æ·ÍŹºÃ¿Ò»Ì칺ÎïÍŹº´òÕÛ!.html
  • %Favorites%\ÃÀÅ®·áÐØ´óÃؾ÷-20ÌìÄÚѸËÙÔö´ó´ó´ó!.html
  • %Favorites%\°¬³ÈÅ®×°--×îÃÀÀöʱÉеÄÅ®×°Æ·ÅÆ.ÃÀÅ®ÂòÒ£¬Ãëɱ°¬³ÈÅ®×°!!.html
  • %Favorites%\Á´½Ó\ÍøÖ·µ¼º½.html
  • %Favorites%\Á´½Ó\¸£²ÊÌå²Ê.html
  • %Favorites%\Á´½Ó\¡ô ÌÔ ±¦ Íø ¡ô.html
  • %Favorites%\Á´½Ó\ºÃÍæСÓÎÏ·.html
  • %Favorites%\Á´½Ó\µ±µ±Íø.html
  • %Favorites%\Á´½Ó\׿ԽÍø.html
  • %Favorites%\Á´½Ó\¿´µçÊÓ¾ç.html
  • %Favorites%\Á´½Ó\С˵Íø.html
  • %Favorites%\Á´½Ó\µ¥»úÓÎÏ·.html
  • %Favorites%\Á´½Ó\ÍøÂçµçÊÓ.html
  • %Favorites%\Á´½Ó\×î¿ìµçÓ°.html
  • %System Root%\taobao.ico
  • %System Root%\game.ico
  • %Desktop%\ÌÔ±¦.url
  • %Desktop%\ÔÚÏßСÓÎÏ·.url

Step 5

Scan your computer with your Trend Micro product to delete files detected as TROJ_VB.JJX. 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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