TROJ_DROPPR.SMAB


 ALIASES:

Trojan:Win32/Agent (Microsoft); Generic Dropper!dqv (McAfee); Trojan.Gen (Symantec); Trojan-Dropper.Win32.Agent.egnh (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan.Generic.5844201 (FSecure)

 PLATFORM:

Windows 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 arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It deletes the initially executed copy of itself.

  TECHNICAL DETAILS

File Size:

151,678 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

04 Nov 2011

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.

Installation

This Trojan creates the following folders:

  • %Windows%\20111027
  • %Windows%\20111027\j8J55dQ2aWJl8hdb
  • %Windows%\20111027\j8J55dQ2aWJl8hdb\script
  • %Windows%\20111027\255qLW2AnWq2ewTE

(Note: %Windows% is the Windows folder, which is usually C:\Windows.)

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
flashget = "%Windows%\20111027\255qlw2anwq2ewte\smss.exe "

It registers itself as a BHO to ensure its automatic execution every time Internet Explorer is used by adding the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{85BF5C3B-5C8C-4483-90B3-74007070CC14}

Other System Modifications

This Trojan modifies the following file(s):

  • %Start Menu%\Programs\Internet Explorer.lnk

(Note: %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.)

It deletes the following files:

  • %System Root%\88822X~1.BAT
  • %Windows%\20111027\j8J55dQ2aWJl8hdb\script\SCRIPT~1.BAT
  • %Windows%\20111027\255qLW2AnWq2ewTE\SMSSEX~1.BAT
  • %Windows%\20111027\j8J55dQ2aWJl8hdb\script\XlKankan.dll
  • %Windows%\20111027\j8J55dQ2aWJl8hdb\script\reg.bat
  • %System Root%\88822X~1.EXE

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %Windows% is the Windows folder, which is usually C:\Windows.)

It adds the following registry keys:

HKEY_CLASSES_ROOT\AllTypes

HKEY_CLASSES_ROOT\AllTypes\shell\
open\command

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{685D2355-C74D-4850-A393-DD622B5F7F2F}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{685D2355-C74D-4850-A393-DD622B5F7F2F}\1.0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{685D2355-C74D-4850-A393-DD622B5F7F2F}\1.0\
FLAGS

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{685D2355-C74D-4850-A393-DD622B5F7F2F}\1.0\
0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{685D2355-C74D-4850-A393-DD622B5F7F2F}\1.0\
0\win32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{685D2355-C74D-4850-A393-DD622B5F7F2F}\1.0\
HELPDIR

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{12AF9BA1-5A64-4F63-90D3-1A269C62C886}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{12AF9BA1-5A64-4F63-90D3-1A269C62C886}\ProxyStubClsid

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{12AF9BA1-5A64-4F63-90D3-1A269C62C886}\ProxyStubClsid32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{12AF9BA1-5A64-4F63-90D3-1A269C62C886}\TypeLib

HKEY_CLASSES_ROOT\CLSID\{760114D6-4609-4936-BE8E-3C2BA00FC261}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{760114D6-4609-4936-BE8E-3C2BA00FC261}\InprocServer32

HKEY_CLASSES_ROOT\QvodAdBlocker.Qvod

HKEY_CLASSES_ROOT\.tt

HKEY_CLASSES_ROOT\tt

HKEY_CLASSES_ROOT\tt\shell\
open\command

HKEY_CLASSES_ROOT\tt\DefaultIcon

HKEY_CLASSES_ROOT\css

HKEY_CLASSES_ROOT\css\shell\
open\command

HKEY_CLASSES_ROOT\css\DefaultIcon

HKEY_CLASSES_ROOT\.bt

HKEY_CLASSES_ROOT\bt

HKEY_CLASSES_ROOT\bt\shell\
open\command

HKEY_CLASSES_ROOT\bt\DefaultIcon

HKEY_CLASSES_ROOT\shb

HKEY_CLASSES_ROOT\shb\shell\
open\command

HKEY_CLASSES_ROOT\shb\DefaultIcon

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Toolbar\Explorer

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Toolbar\ShellBrowser

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes\{B2D17A31-2642-4D03-9D1F-ABD3BE1DCC4E}

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes\{E140FB5B-2A9D-4FA4-A20F-089B92412200}

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Desktop\NameSpace\{871C5380-42A0-1069-A2EA-08002B30309A}

HKEY_CLASSES_ROOT\CLSID\{871C5380-42A0-1069-A2EA-08002B30309A}

HKEY_CLASSES_ROOT\CLSID\{871C5380-42A0-1069-A2EA-08002B30309A}\
DefaultIcon

HKEY_CLASSES_ROOT\CLSID\{871C5380-42A0-1069-A2EA-08002B30309A}\
InProcServer32

HKEY_CLASSES_ROOT\CLSID\{871C5380-42A0-1069-A2EA-08002B30309A}\
Shell

HKEY_CLASSES_ROOT\CLSID\{871C5380-42A0-1069-A2EA-08002B30309A}\
Shell\OpenHomePage

HKEY_CLASSES_ROOT\CLSID\{871C5380-42A0-1069-A2EA-08002B30309A}\
Shell\OpenHomePage\Command

HKEY_CLASSES_ROOT\CLSID\{871C5380-42A0-1069-A2EA-08002B30309A}\
Shell\Q

HKEY_CLASSES_ROOT\CLSID\{871C5380-42A0-1069-A2EA-08002B30309A}\
Shell\Q\Command

HKEY_CLASSES_ROOT\CLSID\{871C5380-42A0-1069-A2EA-08002B30309A}\
Shell\ÊôÐÔ(&R)

HKEY_CLASSES_ROOT\CLSID\{871C5380-42A0-1069-A2EA-08002B30309A}\
Shell\ÊôÐÔ(&R)\Command

HKEY_CLASSES_ROOT\CLSID\{871C5380-42A0-1069-A2EA-08002B30309A}\
ShellFolder

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\MenuExt\ʹÓÃ[×ÛºÏ]Ñ¡´Ê¿ìËÙËÑË÷

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\MenuExt\ʹÓÃ[°Ù¶È]Ñ¡´Ê¿ìËÙËÑË÷

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\MenuExt\ʹÓÃ[¹È¸è]Ñ¡´Ê¿ìËÙËÑË÷

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\MenuExt\ʹÓÃ[ÓеÀ]Ñ¡´Ê¿ìËÙËÑË÷

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
AllTypes
.ini = "inifile"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
AllTypes
.txt = "txtfile"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{12AF9BA1-5A64-4F63-90D3-1A269C62C886}\TypeLib
Version = "1.0"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{760114D6-4609-4936-BE8E-3C2BA00FC261}
ProgID = "QvodAdBlocker.Qvod"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{760114D6-4609-4936-BE8E-3C2BA00FC261}\InprocServer32
ThreadingModel = "Apartment"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{760114D6-4609-4936-BE8E-3C2BA00FC261}
TypeLib = "{685D2355-C74D-4850-A393-DD622B5F7F2F}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{760114D6-4609-4936-BE8E-3C2BA00FC261}
VERSION = "1.0"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
QvodAdBlocker.Qvod
Clsid = "{760114D6-4609-4936-BE8E-3C2BA00FC261}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{12AF9BA1-5A64-4F63-90D3-1A269C62C886}
ProxyStubClsid = "{00020424-0000-0000-C000-000000000046}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{12AF9BA1-5A64-4F63-90D3-1A269C62C886}
ProxyStubClsid32 = "{00020424-0000-0000-C000-000000000046}"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced
Hidden1 = 2

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Session Manager
PendingFileRenameOperations = ""\??\%Windows%\rhnkzu.vbs,\??\%Common Startup%\hxddyn.vbs""

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Session Manager
PendingFileRenameOperations = ""\??\%Windows%\rhnkzu.vbs,\??\%Common Startup%\hxddyn.vbs,\??\""

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Toolbar
ShowDiscussionButton = "Yes"

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

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Toolbar\ShellBrowser
{01E04581-4EEE-11D0-BFE9-00AA005B4383} = {random values}

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

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Toolbar\WebBrowser
{01E04581-4EEE-11D0-BFE9-00AA005B4383} = {random values}

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Toolbar\WebBrowser
{0E5CBF21-D15F-11D0-8301-00AA005B4383} = {random values}

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

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

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Toolbar\WebBrowser
{B580CF65-E151-49C3-B73F-70B13FCA8E86} = {random values}

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Toolbar\WebBrowser
{F2CF5485-4E02-4F68-819C-B92DE9277049} = {random values}

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes
DefaultScope = "{B2D17A31-2642-4D03-9D1F-ABD3BE1DCC4E}"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes\{B2D17A31-2642-4D03-9D1F-ABD3BE1DCC4E}
DisplayName = "°Ù¶Èһϣ¬Äã¾ÍÖªµÀ"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes\{B2D17A31-2642-4D03-9D1F-ABD3BE1DCC4E}
URL = "http://www.{BLOCKED}webs.com/api/baidu/so.htm?word={searchTerms}"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes\{B2D17A31-2642-4D03-9D1F-ABD3BE1DCC4E}
FaviconPath = "%Application Data%\Microsoft\Internet Explorer\Services\search_{B2D17A31-2642-4D03-9D1F-ABD3BE1DCC4E}.ico"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes\{B2D17A31-2642-4D03-9D1F-ABD3BE1DCC4E}
SortIndex = 2

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes\{E140FB5B-2A9D-4FA4-A20F-089B92412200}
DisplayName = "ÌÔ±¦ËÑË÷"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes\{E140FB5B-2A9D-4FA4-A20F-089B92412200}
URL = "http://www.{BLOCKED}webs.com/api/taobao/so.htm?word={searchTerms}"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes\{E140FB5B-2A9D-4FA4-A20F-089B92412200}
FaviconURL = "http://www.{BLOCKED}o.com/favicon.ico"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes\{E140FB5B-2A9D-4FA4-A20F-089B92412200}
FaviconPath = "%Application Data%\Microsoft\Internet Explorer\Services\search_{E140FB5B-2A9D-4FA4-A20F-089B92412200}.ico"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes\{E140FB5B-2A9D-4FA4-A20F-089B92412200}
SortIndex = 6

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{871C5380-42A0-1069-A2EA-08002B30309A}\ShellFolder
Attributes = {random values}

It modifies the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced
HideFileExt = 1

(Note: The default value data of the said registry entry is 1.)

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Start Page = "http://www.{BLOCKED}4.com/?my=1274"

(Note: The default value data of the said registry entry is http://www.microsoft.com/isapi/redir.dll?prd=ie&pver=6&ar=msnhome.)

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Toolbar
LinksFolderName = "Á´½Ó"

(Note: The default value data of the said registry entry is Links.)

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Toolbar
Locked = 1

(Note: The default value data of the said registry entry is 1.)

Dropping Routine

This Trojan drops the following files:

  • %System Root%\88822X2kJQDefem.exe
  • %System Root%\88822X2kJQDefem.exe.bat
  • script.exe
  • script.vbs
  • reg.bat
  • regBHO.reg
  • XlKankan.dll
  • tao.ico
  • smss.exe
  • %Windows%\20111027\j8J55dQ2aWJl8hdb\script\script.exe.bat
  • %Windows%\20111027\255qLW2AnWq2ewTE\smss.exe.bat
  • %Windows%\userid.txt
  • %Windows%\20111027\j8J55dQ2aWJl8hdb\script\Script.vbs.bat
  • %Windows%\Survival_0.txt
  • %Common Startup%\ .jse
  • %Desktop%\Internet Explorer.tt
  • %Start Menu%\Programs\Internet Explorer.css
  • %User Profile%\Quick Launch\Internet Explorer.css
  • %Desktop%\¹ºÎïÌÔ±¦.bt
  • %Windows%\SetWindowsIndex.reg
  • %Favorites%\Á´½Ó\4399СÓÎÏ·.url
  • %Favorites%\³£ÓÃ\4399СÓÎÏ·.url
  • %Favorites%\4399СÓÎÏ·.url
  • %Favorites%\Á´½Ó\¸ßÇåµçÓ°.url
  • %Favorites%\³£ÓÃ\¸ßÇåµçÓ°.url
  • %Favorites%\¸ßÇåµçÓ°.url
  • %Favorites%\Á´½Ó\ÎÞÆÁ±ÎËÑË÷.url
  • %Favorites%\³£ÓÃ\ÎÞÆÁ±ÎËÑË÷.url
  • %Favorites%\ÎÞÆÁ±ÎËÑË÷.url
  • %Favorites%\Á´½Ó\°Ù¶ÈËÑË÷.url
  • %Favorites%\³£ÓÃ\°Ù¶ÈËÑË÷.url
  • %Favorites%\°Ù¶ÈËÑË÷.url
  • %Favorites%\Á´½Ó\ÆðµãС˵.url
  • %Favorites%\³£ÓÃ\ÆðµãС˵.url
  • %Favorites%\ÆðµãС˵.url
  • %Favorites%\Á´½Ó\ÌÔ±¦¹ºÎï.url
  • %Favorites%\³£ÓÃ\ÌÔ±¦¹ºÎï.url
  • %Favorites%\ÌÔ±¦¹ºÎï.url
  • %Favorites%\Á´½Ó\ÍøÂç´´ÒµÃؼ®.url
  • %Favorites%\³£ÓÃ\ÍøÂç´´ÒµÃؼ®.url
  • %Favorites%\ÍøÂç´´ÒµÃؼ®.url
  • %Favorites%\Á´½Ó\ÍøÖ·´óÈ«.url
  • %Favorites%\³£ÓÃ\ÍøÖ·´óÈ«.url
  • %Favorites%\ÍøÖ·´óÈ«.url
  • %Windows%\MYShowIeLinkIe6.reg
  • %Windows%\MyShowIeLinkIe7.reg
  • %Windows%\rhnkzu.vbs
  • %Common Startup%\360vbs.jse
  • %Windows%\search.reg
  • %Windows%\.reg
  • %User Profile%\Quick Launch\Launch Internet Explorer Browser.lnk
  • %Windows%\AddRight.reg

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %Windows% is the Windows folder, which is usually C:\Windows.. %Common Startup% is the system's shared Startup folder, which is usually C:\Documents and Settings\All Users\Start Menu\Programs\Startup on Windows 2000, XP, and Server 2003.. %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Desktop on Windows Vista and 7.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.. %Favorites% is the current user's Favorites folder, which is usually C:\Documents and Settings\{user name}\Favorites on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Favorites on Windows Vista and 7.)

Other Details

This Trojan deletes the initially executed copy of itself

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.200

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

Restart in Safe Mode

[ Learn More ]

Step 3

Close all opened browser windows

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_CLASSES_ROOT
    • AllTypes
  • In HKEY_CLASSES_ROOT\AllTypes\shell\open
    • command
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib
    • {685D2355-C74D-4850-A393-DD622B5F7F2F}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{685D2355-C74D-4850-A393-DD622B5F7F2F}
    • 1.0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{685D2355-C74D-4850-A393-DD622B5F7F2F}\1.0
    • FLAGS
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{685D2355-C74D-4850-A393-DD622B5F7F2F}\1.0
    • 0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{685D2355-C74D-4850-A393-DD622B5F7F2F}\1.0\0
    • win32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{685D2355-C74D-4850-A393-DD622B5F7F2F}\1.0
    • HELPDIR
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
    • {12AF9BA1-5A64-4F63-90D3-1A269C62C886}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{12AF9BA1-5A64-4F63-90D3-1A269C62C886}
    • ProxyStubClsid
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{12AF9BA1-5A64-4F63-90D3-1A269C62C886}
    • ProxyStubClsid32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{12AF9BA1-5A64-4F63-90D3-1A269C62C886}
    • TypeLib
  • In HKEY_CLASSES_ROOT\CLSID
    • {760114D6-4609-4936-BE8E-3C2BA00FC261}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{760114D6-4609-4936-BE8E-3C2BA00FC261}
    • InprocServer32
  • In HKEY_CLASSES_ROOT
    • QvodAdBlocker.Qvod
  • In HKEY_CLASSES_ROOT
    • .tt
  • In HKEY_CLASSES_ROOT
    • tt
  • In HKEY_CLASSES_ROOT\tt\shell\open
    • command
  • In HKEY_CLASSES_ROOT\tt
    • DefaultIcon
  • In HKEY_CLASSES_ROOT
    • css
  • In HKEY_CLASSES_ROOT\css\shell\open
    • command
  • In HKEY_CLASSES_ROOT\css
    • DefaultIcon
  • In HKEY_CLASSES_ROOT
    • .bt
  • In HKEY_CLASSES_ROOT
    • bt
  • In HKEY_CLASSES_ROOT\bt\shell\open
    • command
  • In HKEY_CLASSES_ROOT\bt
    • DefaultIcon
  • In HKEY_CLASSES_ROOT
    • shb
  • In HKEY_CLASSES_ROOT\shb\shell\open
    • command
  • In HKEY_CLASSES_ROOT\shb
    • DefaultIcon
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Toolbar
    • Explorer
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Toolbar
    • ShellBrowser
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer
    • SearchScopes
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes
    • {B2D17A31-2642-4D03-9D1F-ABD3BE1DCC4E}
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes
    • {E140FB5B-2A9D-4FA4-A20F-089B92412200}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Desktop\NameSpace
    • {871C5380-42A0-1069-A2EA-08002B30309A}
  • In HKEY_CLASSES_ROOT\CLSID
    • {871C5380-42A0-1069-A2EA-08002B30309A}
  • In HKEY_CLASSES_ROOT\CLSID\{871C5380-42A0-1069-A2EA-08002B30309A}
    • DefaultIcon
  • In HKEY_CLASSES_ROOT\CLSID\{871C5380-42A0-1069-A2EA-08002B30309A}
    • InProcServer32
  • In HKEY_CLASSES_ROOT\CLSID\{871C5380-42A0-1069-A2EA-08002B30309A}
    • Shell
  • In HKEY_CLASSES_ROOT\CLSID\{871C5380-42A0-1069-A2EA-08002B30309A}\Shell
    • OpenHomePage
  • In HKEY_CLASSES_ROOT\CLSID\{871C5380-42A0-1069-A2EA-08002B30309A}\Shell\OpenHomePage
    • Command
  • In HKEY_CLASSES_ROOT\CLSID\{871C5380-42A0-1069-A2EA-08002B30309A}\Shell
    • Q
  • In HKEY_CLASSES_ROOT\CLSID\{871C5380-42A0-1069-A2EA-08002B30309A}\Shell\Q
    • Command
  • In HKEY_CLASSES_ROOT\CLSID\{871C5380-42A0-1069-A2EA-08002B30309A}\Shell
    • ÊôÐÔ(&R)
  • In HKEY_CLASSES_ROOT\CLSID\{871C5380-42A0-1069-A2EA-08002B30309A}\Shell\ÊôÐÔ(&R)
    • Command
  • In HKEY_CLASSES_ROOT\CLSID\{871C5380-42A0-1069-A2EA-08002B30309A}
    • ShellFolder
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\MenuExt
    • ʹÓÃ[×ÛºÏ]Ñ¡´Ê¿ìËÙËÑË÷
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\MenuExt
    • ʹÓÃ[°Ù¶È]Ñ¡´Ê¿ìËÙËÑË÷
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\MenuExt
    • ʹÓÃ[¹È¸è]Ñ¡´Ê¿ìËÙËÑË÷
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\MenuExt
    • ʹÓÃ[ÓеÀ]Ñ¡´Ê¿ìËÙËÑË÷

Step 5

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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    • flashget="%Windows%\20111027\255qlw2anwq2ewte\smss.exe "
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AllTypes
    • .ini="inifile"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AllTypes
    • .txt="txtfile"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{12AF9BA1-5A64-4F63-90D3-1A269C62C886}\TypeLib
    • Version="1.0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{760114D6-4609-4936-BE8E-3C2BA00FC261}
    • ProgID="QvodAdBlocker.Qvod"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{760114D6-4609-4936-BE8E-3C2BA00FC261}\InprocServer32
    • ThreadingModel="Apartment"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{760114D6-4609-4936-BE8E-3C2BA00FC261}
    • TypeLib="{685D2355-C74D-4850-A393-DD622B5F7F2F}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{760114D6-4609-4936-BE8E-3C2BA00FC261}
    • VERSION="1.0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\QvodAdBlocker.Qvod
    • Clsid="{760114D6-4609-4936-BE8E-3C2BA00FC261}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{12AF9BA1-5A64-4F63-90D3-1A269C62C886}
    • ProxyStubClsid="{00020424-0000-0000-C000-000000000046}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{12AF9BA1-5A64-4F63-90D3-1A269C62C886}
    • ProxyStubClsid32="{00020424-0000-0000-C000-000000000046}"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
    • Hidden1=2
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Session Manager
    • PendingFileRenameOperations=""\??\%Windows%\rhnkzu.vbs,\??\%Common Startup%\hxddyn.vbs""
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Session Manager
    • PendingFileRenameOperations=""\??\%Windows%\rhnkzu.vbs,\??\%Common Startup%\hxddyn.vbs,\??\""
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Toolbar
    • ShowDiscussionButton="Yes"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Toolbar\Explorer
    • ITBarLayout={random values}
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Toolbar\ShellBrowser
    • {01E04581-4EEE-11D0-BFE9-00AA005B4383}={random values}
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Toolbar\ShellBrowser
    • ITBarLayout={random values}
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser
    • {01E04581-4EEE-11D0-BFE9-00AA005B4383}={random values}
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser
    • {0E5CBF21-D15F-11D0-8301-00AA005B4383}={random values}
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser
    • ITBarLayout={random values}
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser
    • ITBar7Layout={random values}
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser
    • {B580CF65-E151-49C3-B73F-70B13FCA8E86}={random values}
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser
    • {F2CF5485-4E02-4F68-819C-B92DE9277049}={random values}
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes
    • DefaultScope="{B2D17A31-2642-4D03-9D1F-ABD3BE1DCC4E}"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes\{B2D17A31-2642-4D03-9D1F-ABD3BE1DCC4E}
    • DisplayName="°Ù¶Èһϣ¬Äã¾ÍÖªµÀ"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes\{B2D17A31-2642-4D03-9D1F-ABD3BE1DCC4E}
    • URL="http://www.{BLOCKED}webs.com/api/baidu/so.htm?word={searchTerms}"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes\{B2D17A31-2642-4D03-9D1F-ABD3BE1DCC4E}
    • FaviconPath="%Application Data%\Microsoft\Internet Explorer\Services\search_{B2D17A31-2642-4D03-9D1F-ABD3BE1DCC4E}.ico"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes\{B2D17A31-2642-4D03-9D1F-ABD3BE1DCC4E}
    • SortIndex=2
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes\{E140FB5B-2A9D-4FA4-A20F-089B92412200}
    • DisplayName="ÌÔ±¦ËÑË÷"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes\{E140FB5B-2A9D-4FA4-A20F-089B92412200}
    • URL="http://www.{BLOCKED}webs.com/api/taobao/so.htm?word={searchTerms}"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes\{E140FB5B-2A9D-4FA4-A20F-089B92412200}
    • FaviconURL="http://www.{BLOCKED}o.com/favicon.ico"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes\{E140FB5B-2A9D-4FA4-A20F-089B92412200}
    • FaviconPath="%Application Data%\Microsoft\Internet Explorer\Services\search_{E140FB5B-2A9D-4FA4-A20F-089B92412200}.ico"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes\{E140FB5B-2A9D-4FA4-A20F-089B92412200}
    • SortIndex=6
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{871C5380-42A0-1069-A2EA-08002B30309A}\ShellFolder
    • Attributes={random values}

Step 6

Restore these modified registry values

[ Learn More ]

Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.

  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
    • From: HideFileExt=1
      To: HideFileExt=1
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
    • From: Start Page="http://www.{BLOCKED}4.com/?my=1274"
      To: Start Page=http://www.microsoft.com/isapi/redir.dll?prd=ie&pver=6&ar=msnhome
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Toolbar
    • From: LinksFolderName="Á´½Ó"
      To: LinksFolderName=Links
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Toolbar
    • From: Locked=1
      To: Locked=1

Step 7

Search and delete these folders

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %Windows%\20111027
  • %Windows%\20111027\j8J55dQ2aWJl8hdb
  • %Windows%\20111027\j8J55dQ2aWJl8hdb\script
  • %Windows%\20111027\255qLW2AnWq2ewTE

Step 8

Search and delete these components

[ Learn More ]
There may be some components 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%\88822X2kJQDefem.exe
  • %System Root%\88822X2kJQDefem.exe.bat
  • script.exe
  • script.vbs
  • reg.bat
  • regBHO.reg
  • XlKankan.dll
  • tao.ico
  • smss.exe
  • %Windows%\20111027\j8J55dQ2aWJl8hdb\script\script.exe.bat
  • %Windows%\20111027\255qLW2AnWq2ewTE\smss.exe.bat
  • %Windows%\userid.txt
  • %Windows%\20111027\j8J55dQ2aWJl8hdb\script\Script.vbs.bat
  • %Windows%\Survival_0.txt
  • %Common Startup%\ .jse
  • %Desktop%\Internet Explorer.tt
  • %Start Menu%\Programs\Internet Explorer.css
  • %User Profile%\Quick Launch\Internet Explorer.css
  • %Desktop%\¹ºÎïÌÔ±¦.bt
  • %Windows%\SetWindowsIndex.reg
  • %Favorites%\Á´½Ó\4399СÓÎÏ·.url
  • %Favorites%\³£ÓÃ\4399СÓÎÏ·.url
  • %Favorites%\4399СÓÎÏ·.url
  • %Favorites%\Á´½Ó\¸ßÇåµçÓ°.url
  • %Favorites%\³£ÓÃ\¸ßÇåµçÓ°.url
  • %Favorites%\¸ßÇåµçÓ°.url
  • %Favorites%\Á´½Ó\ÎÞÆÁ±ÎËÑË÷.url
  • %Favorites%\³£ÓÃ\ÎÞÆÁ±ÎËÑË÷.url
  • %Favorites%\ÎÞÆÁ±ÎËÑË÷.url
  • %Favorites%\Á´½Ó\°Ù¶ÈËÑË÷.url
  • %Favorites%\³£ÓÃ\°Ù¶ÈËÑË÷.url
  • %Favorites%\°Ù¶ÈËÑË÷.url
  • %Favorites%\Á´½Ó\ÆðµãС˵.url
  • %Favorites%\³£ÓÃ\ÆðµãС˵.url
  • %Favorites%\ÆðµãС˵.url
  • %Favorites%\Á´½Ó\ÌÔ±¦¹ºÎï.url
  • %Favorites%\³£ÓÃ\ÌÔ±¦¹ºÎï.url
  • %Favorites%\ÌÔ±¦¹ºÎï.url
  • %Favorites%\Á´½Ó\ÍøÂç´´ÒµÃؼ®.url
  • %Favorites%\³£ÓÃ\ÍøÂç´´ÒµÃؼ®.url
  • %Favorites%\ÍøÂç´´ÒµÃؼ®.url
  • %Favorites%\Á´½Ó\ÍøÖ·´óÈ«.url
  • %Favorites%\³£ÓÃ\ÍøÖ·´óÈ«.url
  • %Favorites%\ÍøÖ·´óÈ«.url
  • %Windows%\MYShowIeLinkIe6.reg
  • %Windows%\MyShowIeLinkIe7.reg
  • %Windows%\rhnkzu.vbs
  • %Common Startup%\360vbs.jse
  • %Windows%\search.reg
  • %Windows%\.reg
  • %User Profile%\Quick Launch\Launch Internet Explorer Browser.lnk
  • %Windows%\AddRight.reg

Step 9

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_DROPPR.SMAB. 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.

Step 10

Restore deleted/modified files and/or registry entries from backup

*Note: Only Microsoft-related files/keys/values will be restored. If this malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.

    %Start Menu%\Programs\Internet Explorer.lnk

Step 11

Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.

  • %System Root%\88822X~1.BAT
  • %Windows%\20111027\j8J55dQ2aWJl8hdb\script\SCRIPT~1.BAT
  • %Windows%\20111027\255qLW2AnWq2ewTE\SMSSEX~1.BAT
  • %Windows%\20111027\j8J55dQ2aWJl8hdb\script\XlKankan.dll
  • %Windows%\20111027\j8J55dQ2aWJl8hdb\script\reg.bat
  • %System Root%\88822X~1.EXE


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