Submission Summary:

• Submission details:
• Submission received: 7 November 2009, 06:36:25
• Processing time: 7 min 37 sec
• Submitted sample:
• File MD5: 0xEA3AC46E57A4739A72F6A7A6014C1C24
• File SHA-1: 0x97E725A2C836AE7D070FFE95E02F6B4359C1EAC3
• Filesize: 60,797 bytes
• Alias:
• Backdoor.Trojan [Symantec]
• BackDoor-DVR [McAfee]
• Troj/Agent-LCN [Sophos]
• Backdoor:Win32/Agent [Microsoft]
• Backdoor.Win32.IRCBot [Ikarus]
• Win32/IRCBot.worm.variant [AhnLab]

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

Security Risk	Description
Backdoor.Bifrose	Backdoor.Bifrose is a backdoor trojan that attempts to propagate by exploiting local network shares. It will also attempt to join a predefined IRC server and channel in order to participate in DDoS attacks.

• 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	%System%\Microsoft\Coffin bif.exe [file and pathname of the sample #1]	60,797 bytes	MD5: 0xEA3AC46E57A4739A72F6A7A6014C1C24 SHA-1: 0x97E725A2C836AE7D070FFE95E02F6B4359C1EAC3	Backdoor.Trojan [Symantec] BackDoor-DVR [McAfee] Troj/Agent-LCN [Sophos] Backdoor:Win32/Agent [Microsoft] Backdoor.Win32.IRCBot [Ikarus] Win32/IRCBot.worm.variant [AhnLab]

• 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).

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\{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 = "%System%\Microsoft\Coffin bif.exe s"

so that Coffin bif.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