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Virus Profile: W32/Autorun.worm.h

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Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 7/5/2007
Date Added: 7/5/2007
Origin: N/A
Length: varies
Type: Virus
Subtype: Win32
DAT Required: 6797
Removal Instructions
   
 
 
   

Description

This detection is for a worm that attempts to copy itself to the root of any accessible disk volumes. Additionally it attempts to place an Autorun.inf file on the root of the volume so that it is executed the next time the volume is mounted.

Indication of Infection

    • Presence of above mentioned Files and registry keys
    • The worm is active in the process list

Methods of Infection

This worm may be spread by its intented method of infected removable drives. Alternatively this may be installed by visiting a malicious web page (either by clicking on a link), or by the website hosting a scripted exploit which installs the worm onto the user's system with no user interaction.

   

Virus Characteristics

---Updated on 15th September, 2012---

Aliases

  • Kaspersky  - HEUR:Trojan.Win32.Generic
  • Microsoft  - VirTool:Win32/Obfuscator.C
  • ESET-NOD32  - a variant of Win32/Delf.QWV
  • F-Secure  - Gen:Trojan.Packed.Heur.liGeIdrepAnc

"W32/Autorun.worm.h" is a worm that may propagate via removable drives or network shares.

Upon Execution, the Worm copies itself into the following location:

  • %SystemDrive%\Settings\search.cmd
  • %SystemDrive%\gpj.scr
  • %Driveroot%\gpj.scr
  • : [RemovableDrive]\gpj.scr
  • %AppData%\rcs.jpg

The above JPG image[porn photo] file get launched by the malware itself.  

Upon execution the Worm tries to connect to the following URL / IP address through remote port 80

htxp://www.cad[removed]et.php?search

The following registry entries have been added to the system.

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\
Search =  "%SystemDrive%\Settings\search.cmd"

The above mentioned registry ensures that the Worm gets executed upon every reboot.

  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Session Manager
    PendingFileRenameOperations= \??\%temp%\#U202egpj-.scr??? 
  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager
    PendingFileRenameOperations = \??\%temp%\#U202egpj-.scr???

The worm  deletes itself by entering above registry value.

---------------------------------------------------------------------------------------------------------------------------------------------------

-------Updated on 15th August,2012----------------------

Aliases -

  • Ikarus   - Trojan-Dropper.Win32.Injector
  • Microsoft - Worm:Win32/Rombrast.A
  • Symantec  - W32.SillyFDC
  • Kaspersky - Trojan-Dropper.Win32.Injector.fhjv

"W32/Autorun.worm.h" is worm that may propagate via removable drives or network shares.

Upon execution the worm inject into the windows explorer (Explorer.exe) and connects to the below IP Address

  • 193.107. [Removed].253

In order to make a connection to the following URL through the remote port 80.

  • rJKnh[Removed]ice.ru 

And copies of itself in to the below location

  • %Temp%\268576.exe
  • %Temp%\b17ef6c_a.dat
  • : [RemovableDrive]\ b17ef6c_a.exe
  • : [RemovableDrive]\ b17ef6c_l.exe

And drops an autorun.inf file into the root of all removable drives and mapped drives in an attempt to autorun an executable when the drive is accessed.

The file "AutoRun.inf" is pointing to the malware binary executable, when the removable or networked drive is accessed from a machine supporting the Autorun feature, the malware is launched automatically.

The Autorun.inf file will look like this

  • [autorun]
  • open=b17ef6c_a.exe

The following registry value has been added to the system.

  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\SuperHidden = 1
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Hidden = 1
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt =0
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowInfoTip = 1
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideIcons = 0
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\SeparateProcess =0

The below mentioned registry values ensures that the worm gets executed whenever the System starts.

  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\
    "b17ef6c" = "%AppData%\Microsoft\b17ef6c.exe"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\
    "b17ef6c" = "%AppData%\Microsoft\b17ef6c.exe"

The following APIs used to hide the malware files in the removable drive:

  • FindFirstFileW
  • FindNextFileW
  • FindFirstFileExW
  • NtQueryDirectoryFile

Also getting the current System information from the compromised system using the below commands

  • GetNativeSystemInfo
  • Get Hostname


--------------------------------------------------------------

----Update July 15, 2011 -----

File Information -

  • MD5 - 6E80E10946A9BE42C58651A588BF7863
  • SHA - F2C1C467B78245FA9E59CFB65DB690A0C805ADDA

Aliases -

  • NOD32 - a variant of Win32/AutoRun.VB.GC
  • Ikarus - Worm.Win32.VB
  • Microsoft - Trojan:Win32/Otran
  • Kaspersky - Worm.Win32.VB.ayv

Upon execution the Trojan connects to the following site " coun[removed].com" through port 10 and copies itself into below mentioned location.

  • %WinDir%\winlog.EXE

Also drops the Following File.

  • %Temp%\~[random name].tmp

Worm disables Task Manager and command run and It  also attempts to create an autorun.inf file on the root of any accessible disk volumes.

The file "AutoRun.inf" is pointing to the malware binary executable. When the removable or networked drive is accessed from a machine supporting the Autorun feature, the malware is launched automatically.

  • [autorun]
  • open=\Recycled.{645FF040-5081-101B-9F08-00AA002F954E}\winlog.EXE
  • shell\open=??(&O)
  • shell\open\Command=Recycled.{645FF040-5081-101B-9F08-00AA002F954E}\winlog.EXE
  • shell\open\Default=1
  • shell\explore=?????(&X)
  • shell\explore\Command=Recycled.{645FF040-5081-101B-9F08-00AA002F954E}\winlog.EXE

The following registry Keys has been deleted from the system.

  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Drive\shell\explore
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Drive\shell\explore\command
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Drive\shell\open
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Drive\shell\open\command
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\360rpt.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\360Safe.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\360tray.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\adam.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\AgentSvr.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\AppSvc32.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\autoruns.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\avgrssvc.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\AvMonitor.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\avp.com
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\avp.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\CCenter.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\ccSvcHst.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\FileDsty.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\FTCleanerShell.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\HijackThis.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\IceSword.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\iparmo.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Iparmor.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\isPwdSvc.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\kabaload.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KaScrScn.SCR
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KASMain.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KASTask.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KAV32.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KAVDX.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KAVPFW.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KAVSetup.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KAVStart.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KISLnchr.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KMailMon.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KMFilter.exe

The following registry Values has been deleted from the system.

  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Drive\shell\explore\command\ = "C:\WINDOWS\winlog.EXE %1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Drive\shell\explore\ = "?????(&X)     "
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Drive\shell\open\command\ = "C:\WINDOWS\winlog.EXE %1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Drive\shell\open\ = "??(&O)  "
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\exefile\NeverShowExt = ""
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\inffile\shell\open\command\: "C:\WINDOWS\winlog.EXE %1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\inifile\shell\open\command\: "C:\WINDOWS\winlog.EXE %1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\: "C:\WINDOWS\winlog.EXE %1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\VBSFile\Shell\Open\Command\: "C:\WINDOWS\winlog.EXE %1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\360rpt.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\360Safe.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\360tray.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\adam.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\AgentSvr.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\AppSvc32.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\autoruns.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\avgrssvc.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\AvMonitor.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\avp.com\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\avp.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\CCenter.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\ccSvcHst.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\FileDsty.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\FTCleanerShell.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\HijackThis.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\IceSword.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\iparmo.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Iparmor.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\isPwdSvc.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\kabaload.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KaScrScn.SCR\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KASMain.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KASTask.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KAV32.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KAVDX.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KAVPFW.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KAVSetup.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KAVStart.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KISLnchr.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KMailMon.exe\Debugger = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KMFilter.exe\Debugger = [binary data]

The following registry Values has been added to the system.

  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\inffile\shell\open\command\ = "%SystemRoot%\System32\NOTEPAD.EXE %1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\inifile\shell\open\command\ = "%SystemRoot%\System32\NOTEPAD.EXE %1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "%SystemRoot%\system32\NOTEPAD.EXE %1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\VBSFile\Shell\Open\Command\ = "%SystemRoot%\System32\WScript.exe "%1" %*"

The following registry Values has been modified to the system.

  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\chm.file\shell\open\command\ = "C:\WINDOWS\winlog.EXE %1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\chm.file\shell\open\command\ = ""C:\WINDOWS\hh.exe" %1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Drive\shell\ = "open"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Drive\shell\ = "none"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\regfile\shell\open\command\ = "C:\WINDOWS\winlog.EXE %1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\regfile\shell\open\command\ = "regedit.exe "%1""
  • [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\NOHIDDEN]
    CheckedValue = 0x00000003
    CheckedValue = 0x00000002
  • [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\SHOWALL]
    CheckedValue = 0x00000002
    CheckedValue = 0x00000001

[Note : %Temp% -  C:\Documents and Settings\[UserName]\Local Settings\Temp\, %WinDir% is C:\WINDOWS]

---------------------

-Update December 3, 2009 -

File Information

    • MD5 - BD3840B8FE9CFE26AAB37220E670BDD5
    • SHA - 95CFAE39D6E38C4679D6011B7E3BB25E878C3694
    • File Size - 275,456 bytes

Aliases

    • AVG - Worm/VB.VYG
    • Norman - W32/VBWorm.ABWQ
    • Ikarus - Worm.Win32.VBKrypt
    • Kaspersky - Worm.Win32.VBKrypt.j

Upon execution the worm copies itself into the following location

    • %SystemDrive%\Diskrun.exe

Also, drops the following files
    • %WINDIR%\system32\lowsec\local.ds
    • %WINDIR%\system32\lowsec\user.ds
    • %WINDIR%\system32\lowsec\user.ds.lll
    • %WINDIR%\System32\sdra64.exe
    • %SystemDrive%\Autorun.inf

The following registry keys have been added to the system.
    • HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\{35106240-D2F0-DB35-716E-127EB80A0299}
    • HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\{43BF8CD1-C5D5-2230-7BB2-98F22C2B7DC6}

The worm disables the windows firewall by adding the following registry value
    • [HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\]
      "EnableFirewall:" = "0x00000000"

The following registry values have been modified.

    • [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\]
      "Userinit:" = "C:\WINDOWS\system32\userinit.exe,"
    • [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\]
      "Userinit:" = "C:\WINDOWS\system32\userinit.exe,C:\WINDOWS\system32\sdra64.exe,"

The following folder has been added to the system
    • %WINDIR%\system32\lowsec

Once the user system is compromised it steals the financial information (e.g : User Name, Password etc) and sends that information to the remote site without the user knowledge.

[Where %WinDir% is the winows directory, for example c:\Windows, %SystemDrive% is the drive where the Operating System is installed, in most cases it will be C:\]

                                        -------------------------------------

File Information

MD5 - A3E855DE7D37FB42BD804660AF8176F3
Size -36864 bytes

This worm copies itself to the %system% folder as explorer.exe (Size -36864 bytes) on drive C and connected external drives, and also creates an autorun.inf file on the external drives.

It adds the following registry entries.

  HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run       "EXPLORER.EXE"
  Type: REG_SZ
  Data: EXPLORER.EXE
   HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run "wsctf.exe"
  Type: REG_SZ
  Data: wsctf.exe

It changes following registry entries.
  HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon           "Userinit"
  Old type: REG_SZ
  New type: REG_SZ
  Old data: C:\WINDOWS\system32\userinit.exe,
  New data: userinit.exe,EXPLORER.EXE
         
It drops the following files:

         c:\WINDOWS\system32\explorer.exe (Size -36864 bytes)
  
         %External Drive%\autorun.inf (Size:165 bytes)

[Where %External Drive% is the drive letter of the External Storage Devices (e.g. USB stick, Flash drive, Pen Drive etc..)]

 

---------------------------------------------

-----Update november 11, 2009--------

File Information

    • MD5 - Bc2f7c071c53fe8ec6441e8f745af802
    • Size - 740352 bytes

This worm copies itself to a hidden folder called \RESTORE\k-1-3542-4232123213-7676767-8888886\ on drive C and connected external drives, and also creates an autorun.inf file on the external drives.

It adds the following registry entries.
    • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{67KLN5J0-4OPM-00WE-AAX5-77EF1D187563} "StubPath"
    • Type: REG_SZ
    • Data: C:\RESTORE\k-1-3542-4232123213-7676767-8888886\RanDll.exe

It drops the following files:

    • C:\RESTORE\k-1-3542-4232123213-7676767-8888886\Desktop.ini (Size: 62 bytes)
    • C:\RESTORE\k-1-3542-4232123213-7676767-8888886\RanDll.exe (Size: 740,352 bytes)
    • %External Drive%\autorun.inf (Size:254 bytes)

[Where %External Drive% is the drive letter of the External Storage Devices (e.g. USB stick, Flash drive, Pen Drive etc..)]

                               ------------------------------------------------

This detection is for a worm.It attempts to spread to removable drives by creating an autorun.inf file, which will run the worm automatically, if a systems which use the removable drive are set to Autorun.

The following registry keys are created:

    • [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
      "comstr"="\"C:\\WINDOWS\\system32\\comstr.exe\""

The following files are written to root of writeable volumes:

    •  AUTORUN.INF
    •  BOOT.VBS
    •  HP.EXE
    •  SYSTEMM7.EXE

The following files are also written to the infected system:

    • %WINDIR%\SYSTEMM7.EXE
    • %WINDIR%\SYSTEM32\COMSTR.EXE
    • %WINDIR%\SYSTEM32\SYSTEMM7.EXE
   

All Users:
Use current engine and DAT files for detection and removal.

Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).