Submission Summary:

• Submission details:
• Submission received: 21 January 2010, 06:53:17
• Processing time: 6 min 49 sec
• Submitted sample:
• File MD5: 0xC880872A000F6EF7AF5409E64F6BC0C5
• File SHA-1: 0x825B999503E13FF239F94A7B813721E90D818BDA
• Filesize: 94,545 bytes
• Alias:
• Trojan.Generic [PCTools]
• Trojan Horse [Symantec]
• Trojan.Win32.Refroso.uih [Kaspersky Lab]
• Generic.dx!ikq [McAfee]
• TROJ_REFROSO.SMM [Trend Micro]
• Troj/Refroso-B [Sophos]
• Trojan:Win32/VB.VO [Microsoft]

• Summary of the findings:

What's been found	Severity Level
Creates a startup registry entry.
Contains characteristics of an identified security risk.

Technical Details:

Possible Security Risk

• Attention! The following threat category was identified:

Threat Category	Description
	A malicious trojan horse or bot that may represent security risk for the compromised system and/or its network environment

File System Modifications

• The following file was created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%ProgramFiles%\Bifrost\Server.exe [file and pathname of the sample #1]	94,545 bytes	MD5: 0xC880872A000F6EF7AF5409E64F6BC0C5 SHA-1: 0x825B999503E13FF239F94A7B813721E90D818BDA	Trojan.Generic [PCTools] Trojan Horse [Symantec] Trojan.Win32.Refroso.uih [Kaspersky Lab] Generic.dx!ikq [McAfee] TROJ_REFROSO.SMM [Trend Micro] Troj/Refroso-B [Sophos] Trojan:Win32/VB.VO [Microsoft]

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

• The following directory was created:
• %ProgramFiles%\Bifrost

Registry Modifications

• The following Registry Keys were created:
• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{9D71D88C-C598-4935-C5D1-43AA4DB90836}
• HKEY_LOCAL_MACHINE\SOFTWARE\Bifrost
• HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\MediaResources\msvideo
• HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\MediaResources\msvideo
• HKEY_CURRENT_USER\Software\Bifrost

• The newly created Registry Values are:
• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{9D71D88C-C598-4935-C5D1-43AA4DB90836}]
• stubpath = "%ProgramFiles%\Bifrost\Server.exe s"

so that Server.exe runs every time Windows starts

• [HKEY_LOCAL_MACHINE\SOFTWARE\Bifrost]
• nck = DE 09 F7 68 AD 75 C3 03 15 ED A3 11 8E 93 5B 67
• [HKEY_CURRENT_USER\Software\Bifrost]
• klg = 00

Other details

• Analysis of the file resources indicate the following possible country of origin:

	Spain