Submission Summary:

• Submission details:
• Submission received: 20 July 2012, 02:16:32
• Processing time: 11 min 12 sec
• Submitted sample:
• File MD5: 0x8BF4A65069C5B17AEE904020774B1248
• File SHA-1: 0xBEDFE9C2E3FA98428118C9EFFCD33947EA120762
• Filesize: 32,637 bytes
• Alias:
• Backdoor.Trojan [Symantec]
• Generic BackDoor.aab [McAfee]
• BKDR_BIFROSE.SMA [Trend Micro]
• Mal/Bifrose-X [Sophos]
• Trojan.Win32.Midgare [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 file was created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%ProgramFiles%\Bifrost\s.e.exe [file and pathname of the sample #1]	32,637 bytes	MD5: 0x8BF4A65069C5B17AEE904020774B1248 SHA-1: 0xBEDFE9C2E3FA98428118C9EFFCD33947EA120762	Backdoor.Trojan [Symantec] Generic BackDoor.aab [McAfee] BKDR_BIFROSE.SMA [Trend Micro] Mal/Bifrose-X [Sophos] Trojan.Win32.Midgare [Ikarus]

• 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

• 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\{40152B35-4071-50C0-6C8A-F1A267AEBB4D}
• 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\{40152B35-4071-50C0-6C8A-F1A267AEBB4D}]
• stubpath = "%ProgramFiles%\Bifrost\s.e.exe s"

so that s.e.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