ThreatExpert Report: Trojan:Win32/Msidebar.C, not-a-virus:Client-IRC.Win32

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Submission Summary:

Submission details:

Submission received: 14 February 2013, 19:03:21
Processing time: 7 min 7 sec
Submitted sample:

File MD5: 0x99DFE232283A1A42FD22778136777A6F
File SHA-1: 0x4D203A510320F3BB834DD1D1C825FB9FA4D6B6D8
Filesize: 876,681 bytes
Alias:

Trojan:Win32/Msidebar.C [Microsoft]
not-a-virus:Client-IRC.Win32 [Ikarus]

Summary of the findings:

What's been found	Severity Level
Downloads/requests other files from Internet.
Registers a 32-bit in-process server DLL.
Registers a Browser Helper Object (Microsoft's Internet Explorer plugin module).

Technical Details:

Memory Modifications

There were new processes created in the system:

Process Name	Process Filename	Main Module Size
winsearchocndl.exe	%ProgramFiles%\winsearchocn\winsearchocndl.exe	36,864 bytes
[filename of the sample #1]	[file and pathname of the sample #1]	139,264 bytes

Note:

%ProgramFiles% is a variable that refers to the Program Files folder. A typical path is C:\Program Files.

Registry Modifications

The following Registry Keys were created:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{36DC5704-F5DE-4BE0-A997-804C2B1A2A84}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{36DC5704-F5DE-4BE0-A997-804C2B1A2A84}\Implemented Categories
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{36DC5704-F5DE-4BE0-A997-804C2B1A2A84}\Implemented Categories\{40FC6ED5-2438-11CF-A3DB-080036F12502}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{36DC5704-F5DE-4BE0-A997-804C2B1A2A84}\InprocServer32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{36DC5704-F5DE-4BE0-A997-804C2B1A2A84}\ProgID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{36DC5704-F5DE-4BE0-A997-804C2B1A2A84}\Programmable
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{36DC5704-F5DE-4BE0-A997-804C2B1A2A84}\TypeLib
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{36DC5704-F5DE-4BE0-A997-804C2B1A2A84}\VERSION
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B2E915B8-ED76-42AC-BB40-6FC5D2ED072C}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B2E915B8-ED76-42AC-BB40-6FC5D2ED072C}\Implemented Categories
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B2E915B8-ED76-42AC-BB40-6FC5D2ED072C}\Implemented Categories\{40FC6ED5-2438-11CF-A3DB-080036F12502}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B2E915B8-ED76-42AC-BB40-6FC5D2ED072C}\InprocServer32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B2E915B8-ED76-42AC-BB40-6FC5D2ED072C}\ProgID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B2E915B8-ED76-42AC-BB40-6FC5D2ED072C}\Programmable
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B2E915B8-ED76-42AC-BB40-6FC5D2ED072C}\TypeLib
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B2E915B8-ED76-42AC-BB40-6FC5D2ED072C}\VERSION
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{3AD6C207-E2D9-4391-A48B-674A93319592}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{3AD6C207-E2D9-4391-A48B-674A93319592}\ProxyStubClsid
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{3AD6C207-E2D9-4391-A48B-674A93319592}\ProxyStubClsid32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{3AD6C207-E2D9-4391-A48B-674A93319592}\TypeLib
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{935E0048-9BA4-449D-8517-734FCEF7F565}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{935E0048-9BA4-449D-8517-734FCEF7F565}\ProxyStubClsid
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{935E0048-9BA4-449D-8517-734FCEF7F565}\ProxyStubClsid32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{935E0048-9BA4-449D-8517-734FCEF7F565}\TypeLib
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{61B5A29E-E019-4A9D-81AA-69E5004EA460}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{61B5A29E-E019-4A9D-81AA-69E5004EA460}\4.0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{61B5A29E-E019-4A9D-81AA-69E5004EA460}\4.0\0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{61B5A29E-E019-4A9D-81AA-69E5004EA460}\4.0\0\win32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{61B5A29E-E019-4A9D-81AA-69E5004EA460}\4.0\FLAGS
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{61B5A29E-E019-4A9D-81AA-69E5004EA460}\4.0\HELPDIR
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{B1D5D7E3-22A1-4A19-B9D7-3366ED72F6B5}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{B1D5D7E3-22A1-4A19-B9D7-3366ED72F6B5}\6.0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{B1D5D7E3-22A1-4A19-B9D7-3366ED72F6B5}\6.0\0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{B1D5D7E3-22A1-4A19-B9D7-3366ED72F6B5}\6.0\0\win32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{B1D5D7E3-22A1-4A19-B9D7-3366ED72F6B5}\6.0\FLAGS
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{B1D5D7E3-22A1-4A19-B9D7-3366ED72F6B5}\6.0\HELPDIR
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\cleversearchocncfg.cleversearchocn
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\cleversearchocncfg.cleversearchocn\Clsid
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\winsearchocnprg.winsearchocn
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\winsearchocnprg.winsearchocn\Clsid
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{36DC5704-F5DE-4BE0-A997-804C2B1A2A84}
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{B2E915B8-ED76-42AC-BB40-6FC5D2ED072C}
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Winsearch

The newly created Registry Values are:

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{36DC5704-F5DE-4BE0-A997-804C2B1A2A84}\VERSION]

(Default) = "6.0"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{36DC5704-F5DE-4BE0-A997-804C2B1A2A84}\TypeLib]

(Default) = "{B1D5D7E3-22A1-4A19-B9D7-3366ED72F6B5}"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{36DC5704-F5DE-4BE0-A997-804C2B1A2A84}\ProgID]

(Default) = "winsearchocnprg.winsearchocn"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{36DC5704-F5DE-4BE0-A997-804C2B1A2A84}\InprocServer32]

(Default) = "%ProgramFiles%\Winsearchocn\winsearchocn.dll"
ThreadingModel = "Apartment"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{36DC5704-F5DE-4BE0-A997-804C2B1A2A84}]

(Default) = "winsearchocnprg.winsearchocn"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B2E915B8-ED76-42AC-BB40-6FC5D2ED072C}\VERSION]

(Default) = "4.0"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B2E915B8-ED76-42AC-BB40-6FC5D2ED072C}\TypeLib]

(Default) = "{61B5A29E-E019-4A9D-81AA-69E5004EA460}"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B2E915B8-ED76-42AC-BB40-6FC5D2ED072C}\ProgID]

(Default) = "cleversearchocncfg.cleversearchocn"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B2E915B8-ED76-42AC-BB40-6FC5D2ED072C}\InprocServer32]

(Default) = "%ProgramFiles%\Winsearchocn\cleversearchocn.dll"
ThreadingModel = "Apartment"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B2E915B8-ED76-42AC-BB40-6FC5D2ED072C}]

(Default) = "cleversearchocncfg.cleversearchocn"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{3AD6C207-E2D9-4391-A48B-674A93319592}\TypeLib]

(Default) = "{B1D5D7E3-22A1-4A19-B9D7-3366ED72F6B5}"
Version = "6.0"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{3AD6C207-E2D9-4391-A48B-674A93319592}\ProxyStubClsid32]

(Default) = "{00020424-0000-0000-C000-000000000046}"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{3AD6C207-E2D9-4391-A48B-674A93319592}\ProxyStubClsid]

(Default) = "{00020424-0000-0000-C000-000000000046}"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{3AD6C207-E2D9-4391-A48B-674A93319592}]

(Default) = "winsearchocn"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{935E0048-9BA4-449D-8517-734FCEF7F565}\TypeLib]

(Default) = "{61B5A29E-E019-4A9D-81AA-69E5004EA460}"
Version = "4.0"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{935E0048-9BA4-449D-8517-734FCEF7F565}\ProxyStubClsid32]

(Default) = "{00020424-0000-0000-C000-000000000046}"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{935E0048-9BA4-449D-8517-734FCEF7F565}\ProxyStubClsid]

(Default) = "{00020424-0000-0000-C000-000000000046}"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{935E0048-9BA4-449D-8517-734FCEF7F565}]

(Default) = "cleversearchocn"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{61B5A29E-E019-4A9D-81AA-69E5004EA460}\4.0\0\win32]

(Default) = "%ProgramFiles%\Winsearchocn\cleversearchocn.dll"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{61B5A29E-E019-4A9D-81AA-69E5004EA460}\4.0\HELPDIR]

(Default) = "%ProgramFiles%\Winsearchocn"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{61B5A29E-E019-4A9D-81AA-69E5004EA460}\4.0\FLAGS]

(Default) = "0"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{61B5A29E-E019-4A9D-81AA-69E5004EA460}\4.0]

(Default) = "cleversearchocncfg"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{B1D5D7E3-22A1-4A19-B9D7-3366ED72F6B5}\6.0\0\win32]

(Default) = "%ProgramFiles%\Winsearchocn\winsearchocn.dll"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{B1D5D7E3-22A1-4A19-B9D7-3366ED72F6B5}\6.0\HELPDIR]

(Default) = "%ProgramFiles%\Winsearchocn"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{B1D5D7E3-22A1-4A19-B9D7-3366ED72F6B5}\6.0\FLAGS]

(Default) = "0"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{B1D5D7E3-22A1-4A19-B9D7-3366ED72F6B5}\6.0]

(Default) = "winsearchocnprg"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\cleversearchocncfg.cleversearchocn\Clsid]

(Default) = "{B2E915B8-ED76-42AC-BB40-6FC5D2ED072C}"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\cleversearchocncfg.cleversearchocn]

(Default) = "cleversearchocncfg.cleversearchocn"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\winsearchocnprg.winsearchocn\Clsid]

(Default) = "{36DC5704-F5DE-4BE0-A997-804C2B1A2A84}"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\winsearchocnprg.winsearchocn]

(Default) = "winsearchocnprg.winsearchocn"

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion]

winsearchocn = 0x00000001

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{36DC5704-F5DE-4BE0-A997-804C2B1A2A84}]

(Default) = ""

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{B2E915B8-ED76-42AC-BB40-6FC5D2ED072C}]

(Default) = ""

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Winsearch]

DisplayName = "Winsearch"
DisplayIcon = "%ProgramFiles%\Winsearchocn\Uninstall.exe"
UninstallString = "%ProgramFiles%\Winsearchocn\Uninstall.exe"
NoModify = 0x00000001
NoRepair = 0x00000001

[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main]

Enable Browser Extensions = "yes"

Other details

The following Host Name was requested from a host database:

192.5.5.241

There was registered attempt to establish connection with the remote host. The connection details are:

Remote Host	Port Number
192.5.5.241	1033

The following HTTP URLs were started reading:

http://dns3.ktguide.com/search/index.php?ss=r1search%5Ednsearch%5Eitopsearch&Query=;http://dns3.ktguide.com/search/index.php?ss=r1search%5Ednsearch%5Eitopsearch&Query=;1;5;8;r1search;5;59;//dns3.ktguide.com;;
http://dns.ktguide.com/search/index.php?Query=;http://dns.ktguide.com/search/index.php?Query=;0;1;59;###;58;59;######;;

The data identified by the following URLs was then requested from the remote web server:

http://121.78.93.28/~paran/execute.php?m_origin=BYC&usr_id=one&mac=&usr_gubun=X&serialno=&Pid=winsearchocn2
http://121.78.93.28/~paran/execute.php?m_origin=BYC&usr_id=one&mac=&usr_gubun=E&serialno=&Pid=winsearchocn
http://121.78.93.28/~paran/execute.php?m_origin=BYC&usr_id=one&mac=&usr_gubun=I&serialno=&Pid=winsearchocn
http://121.78.93.28/~paran/winsearchocn/winsearchocn1.html
http://121.78.93.28/~paran/execute.php?m_origin=BYC&usr_id=one&mac=&usr_gubun=E&serialno=&Pid=cleversearchocn
http://121.78.93.28/~paran/cleversearchocn/cleversearchocn.html

There was application-defined hook procedure installed into the hook chain (e.g. to monitor keystrokes). The installed hook is handled by the following module:

%System%\MSVBVM60.DLL

Notes:

%System% is a variable that refers to the System folder. By default, this is C:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).

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