Submission Summary:

• Submission details:
• Submission received: 7 August 2012, 01:40:37
• Processing time: 8 min 32 sec
• Submitted sample:
• File MD5: 0x27D86A7AB98B7F876B65D8AA275A7F89
• File SHA-1: 0x2FC7DF4E4883B69F7847F3B75B5EB59CE517E43D
• Filesize: 31,996 bytes
• Alias:
• Backdoor.Bifrose [Symantec]
• Backdoor.Win32.Bifrose.fxu [Kaspersky Lab]
• BackDoor-CEP.gen.cm [McAfee]
• Mal/Bifrose-X [Sophos]
• Backdoor:Win32/Bifrose.HZ [Microsoft]
• Virus.Win32.Bifrose [Ikarus]
• Win-Trojan/Bifrose.31964 [AhnLab]

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 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]	31,996 bytes	MD5: 0x27D86A7AB98B7F876B65D8AA275A7F89 SHA-1: 0x2FC7DF4E4883B69F7847F3B75B5EB59CE517E43D	Backdoor.Bifrose [Symantec] Backdoor.Win32.Bifrose.fxu [Kaspersky Lab] BackDoor-CEP.gen.cm [McAfee] Mal/Bifrose-X [Sophos] Backdoor:Win32/Bifrose.HZ [Microsoft] Virus.Win32.Bifrose [Ikarus] Win-Trojan/Bifrose.31964 [AhnLab]

• 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

Memory Modifications

• There were new processes created in the system:

Process Name	Process Filename	Main Module Size
[filename of the sample #1]	[file and pathname of the sample #1]	35,168 bytes
server.exe	%ProgramFiles%\bifrost\server.exe	35,168 bytes

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 = ED 1B E6 27 B9 28 D6 32 74 C3 CD 74 FA 93 5B 67
• [HKEY_CURRENT_USER\Software\Bifrost]
• klg = 00

Other details

• To mark the presence in the system, the following Mutex object was created:
• Bif1234

• The following Host Name was requested from a host database:
• senouci.no-ip.org