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Date discovered:17/08/2009
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Medium
Damage Potential:Low to medium
Static file:Yes
File size:167.403 Bytes
MD5 checksum:2e8da5a55865a091864a4338ef4d2e44
IVDF version: - Monday, August 17, 2009

 General Methods of propagation:
    Autorun feature
   • Local network

   •  Mcafee: W32/Conficker.worm.gen.b
   •  Panda: W32/Conficker.C.worm
   •  Eset: Win32/Conficker.AL

Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003

Side effects:
   • Lowers security settings
   • Drops malicious files
   • Registry modification
   • Makes use of software vulnerability

 Files It copies itself to the following locations:
   • %drive%\RECYCLER\%CLSID%\qepdjla.dll
   • %SYSDIR%\qepdjla.dll

It deletes the initially executed copy of itself.

The following file is created:

%drive%\autorun.inf This is a non malicious text file with the following content:
   • %code that runs malware%

It tries to execute the following file:

   • explorer C:

 Registry The following registry keys are added in order to load the service after reboot:

   • "Description"="Provides support for synchronizing objects between the host and guest operating systems."
   • "DisplayName"="Security Universal"
   • "ErrorControl"=dword:0x00000000
   • "ImagePath"="%SystemRoot%\system32\svchost.exe -k netsvcs"
   • "ObjectName"="LocalSystem"
   • "Start"=dword:0x00000002
   • "Type"=dword:0x00000020

It creates the following entry in order to bypass the Windows XP firewall:

   • "8182:TCP"="8182:TCP:*:Enabled:opijcn"

The following registry key is added:

   • "ServiceDll"="%SYSDIR%\qepdjla.dll"

The following registry keys are changed:

[HKEY_USERS\.DEFAULT\Software\Microsoft\Windows NT\CurrentVersion\
   New value:
   • "ParseAutoexec"="1"

[HKCU\Software\Microsoft\Internet Explorer\Toolbar]
   New value:
   • "Locked"=dword:0x00000001

   New value:
   • "DontPrettyPath"=dword:0x00000000
   • "Filter"=dword:0x00000000
   • "Hidden"=dword:0x00000002
   • "HideFileExt"=dword:0x00000000
   • "HideIcons"=dword:0x00000000
   • "MapNetDrvBtn"=dword:0x00000001
   • "SeparateProcess"=dword:0x00000001
   • "ShowCompColor"=dword:0x00000001
   • "ShowInfoTip"=dword:0x00000000
   • "SuperHidden"=dword:0x00000000
   • "WebView"=dword:0x00000000

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SvcHost]
   New value:
   • "netsvcs"="6to4"

   New value:
   • "CheckedValue"=dword:0x00000000

 Network Infection In order to ensure its propagation the malware attemps to connect to other machines as described below.

It makes use of the following Exploits:
– MS04-007 (ASN.1 Vulnerability)
– MS05-039 (Vulnerability in Plug and Play)
 MS06-040 (Vulnerability in Server Service)

Remote execution:
It attempts to schedule a remote execution of the malware, on the newly infected machine. Therefore it uses the NetScheduleJobAdd function.

 Injection – It injects a backdoor routine into a process.

    Process name:
   • svchost.exe

 Miscellaneous  Checks for an internet connection by contacting the following web site:

It creates the following Mutexes:
   • vxhcelmtytwb
   • vcxhnoiftekm
   • dvkwjdesgb

 File details Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with a runtime packer.

Description inserted by Petre Galan on Thursday, December 2, 2010
Description updated by Petre Galan on Thursday, December 2, 2010

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