Submission Summary:

• Submission details:
• Submission received: 3 November 2009, 16:08:03
• Processing time: 5 min 2 sec
• Submitted sample:
• File MD5: 0x048A766A519106198071640BDB0FFE3C
• File SHA-1: 0x8332F28EC428AFF307465E81599F0D220C822110
• Filesize: 181,225 bytes
• Alias:
• Backdoor.Win32.ProRat.egc [Kaspersky Lab]
• Mal/Generic-A [Sophos]
• Win-Trojan/Prorat.181225 [AhnLab]

• Summary of the findings:

What's been found	Severity Level
Threat characteristics of Vundo (aka VirtuMonde/VirtuMundo), a trojan horse that cause popups and advertises rogue antispyware programs. Vundo can be installed by visiting a Web site link contained in a spammed email. It is known to create a DLL file in the Windows system32 directory and inject it into system processes winlogon.exe and explorer.exe.
Registers a Winlogon notification package so that the installed module is loaded into the address space of winlogon.exe.
Registers a 32-bit in-process server DLL.
Contains characteristics of an identified security risk.

Technical Details:

Possible Security Risk

• Attention! Characteristics of the following security risk was identified in the system:

Security Risk	Description
Trojan.Virtumonde	Virtumonde modifies the Windows Internet connection mechanism and display various pop-up advertisements.

• Attention! The following threat categories were identified:

Threat Category	Description
	A malicious trojan horse or bot that may represent security risk for the compromised system and/or its network environment
	A malicious backdoor trojan that runs in the background and allows remote access to the compromised system

File System Modifications

• The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%Temp%\iifdefdE.bat	95 bytes	MD5: 0xAE9DC0ED2F90ABB47EB362C7BB41C6E5 SHA-1: 0x2C1A92D9167E86D2DCA20DF5BED7A22D84ABE135	(not available)
2	%System%\fccaYsrO.dll	36,352 bytes	MD5: 0x757CA731886C42A0C9FFA338E354D0F1 SHA-1: 0x6D39E0B7E39FE943176A26A8EFE176573F068239	Packed.Generic.202 [Symantec] Trojan.Win32.Monderb.asqi [Kaspersky Lab] Troj/Virtum-Gen [Sophos] Win-Trojan/Monderb.36352.AO [AhnLab]
3	[file and pathname of the sample #1]	181,225 bytes	MD5: 0x048A766A519106198071640BDB0FFE3C SHA-1: 0x8332F28EC428AFF307465E81599F0D220C822110	Backdoor.Win32.ProRat.egc [Kaspersky Lab] Mal/Generic-A [Sophos] Win-Trojan/Prorat.181225 [AhnLab]

• Notes:
• %Temp% is a variable that refers to the temporary folder in the short path form. By default, this is C:\Documents and Settings\[UserName]\Local Settings\Temp\ (Windows NT/2000/XP).
• %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).

Memory Modifications

• There was a new process created in the system:

• The following module was loaded into the address space of other process(es):

Module Name	Module Filename	Address Space Details
fccaYsrO.dll	%System%\fccaYsrO.dll	Process name: explorer.exe Process filename: %Windir%\explorer.exe Address space: 0x1E80000 - 0x1E98000

• Notes:
• %Windir% is a variable that refers to the Windows installation folder. By default, this is C:\Windows or C:\Winnt.

Registry Modifications

• The following Registry Keys were created:
• HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{6D794CB4-C7CD-4c6f-BFDC-9B77AFBDC02C}
• HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{6D794CB4-C7CD-4c6f-BFDC-9B77AFBDC02C}\InprocServer32
• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Control Panel\Settings
• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\fccaYsrO
• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\00cd0861

• The newly created Registry Values are:
• [HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{6D794CB4-C7CD-4c6f-BFDC-9B77AFBDC02C}\InprocServer32]
• (Default) = "%System%\fccaYsrO.dll"
• ThreadingModel = "Both"
• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Control Panel\Settings]
• Time = 70 EF 82 25 E3 5C CA 01 00 00 00 00
• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\ShellExecuteHooks]
• {6D794CB4-C7CD-4c6f-BFDC-9B77AFBDC02C} = ""
• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\fccaYsrO]
• Asynchronous = 0x00000001
• DllName = "fccaYsrO.dll"
• Impersonate = 0x00000000
• Logon = "o"
• Logoff = "f"

so that fccaYsrO.dll is installed as a Winlogon notification package

• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\00cd0861]
• (Default) = "E555DF776A814A82BC426D1689BF3CF2&"
• [HKEY_CURRENT_USER\Software\Microsoft\Installer]
• (Default) = EC E2 CF 27 E3 5C CA 01