Submission Summary:

• Submission details:
• Submission received: 8 July 2012, 04:17:51
• Processing time: 11 min 9 sec
• Submitted sample:
• File MD5: 0x9831ED4941C3C470014A5536039A6E44
• File SHA-1: 0xFF16288E0C4A96D73706A77F9F7D4F42512EE57E
• Filesize: 29,980 bytes
• Alias:
• Backdoor.Bifrose [Symantec]
• Backdoor.Win32.Bifrose.fvn [Kaspersky Lab]
• BackDoor-CEP.gen.cm [McAfee]
• Troj/Bifrose-WC [Sophos]
• Trojan.Win32.Refroso [Ikarus]

• 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 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	%System%\AppPatch\logg.dat	0 bytes	MD5: 0xD41D8CD98F00B204E9800998ECF8427E SHA-1: 0xDA39A3EE5E6B4B0D3255BFEF95601890AFD80709	(not available)
2	%System%\AppPatch\server.exe [file and pathname of the sample #1]	29,980 bytes	MD5: 0x9831ED4941C3C470014A5536039A6E44 SHA-1: 0xFF16288E0C4A96D73706A77F9F7D4F42512EE57E	Backdoor.Bifrose [Symantec] Backdoor.Win32.Bifrose.fvn [Kaspersky Lab] BackDoor-CEP.gen.cm [McAfee] Troj/Bifrose-WC [Sophos] Trojan.Win32.Refroso [Ikarus]

• Note:
• %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).

• The following directory was created:
• %System%\AppPatch

Memory Modifications

• Attention! The following process was intentionally hidden from the user:

Process Name	Main Module Size
IEXPLORE.EXE	102,400 bytes

Registry Modifications

• The following Registry Keys were created:
• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{04F5220A-B4AA-6484-2B29-B64DA9837FFB}
• 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\{04F5220A-B4AA-6484-2B29-B64DA9837FFB}]
• stubpath = "%System%\AppPatch\server.exe s"

so that server.exe runs every time Windows starts

• [HKEY_LOCAL_MACHINE\SOFTWARE\Bifrost]
• nck = ED 1B E6 27 B9 28 D6 32 74 C3 CD 74 FA 93 5B 67
• [HKEY_CURRENT_USER\Software\Bifrost]
• klg = 01