Submission Summary:

• Submission details:
• Submission received: 23 October 2012, 10:10:52
• Processing time: 7 min 49 sec
• Submitted sample:
• File MD5: 0x377B4EDAA39E67363302267892C0EC49
• File SHA-1: 0x85D83F930A3C5766A1F826D929960596A1B724DB
• Filesize: 32,669 bytes
• Alias:
• Backdoor.Trojan [Symantec]
• Backdoor.Win32.Bifrose.fxv [Kaspersky Lab]
• Generic BackDoor.aab [McAfee]
• BKDR_BIFROSE.SMA [Trend Micro]
• Mal/Bifrose-X [Sophos]
• Backdoor:Win32/Bifrose.AE [Microsoft]
• Trojan.Win32.Midgare [Ikarus]
• Win-Trojan/Midgare.30208 [AhnLab]

• Summary of the findings:

What's been found	Severity Level
Produces outbound traffic.
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	%ProgramFiles%\Bifrost\server.exe [file and pathname of the sample #1]	32,669 bytes	MD5: 0x377B4EDAA39E67363302267892C0EC49 SHA-1: 0x85D83F930A3C5766A1F826D929960596A1B724DB	Backdoor.Trojan [Symantec] Backdoor.Win32.Bifrose.fxv [Kaspersky Lab] Generic BackDoor.aab [McAfee] BKDR_BIFROSE.SMA [Trend Micro] Mal/Bifrose-X [Sophos] Backdoor:Win32/Bifrose.AE [Microsoft] Trojan.Win32.Midgare [Ikarus] Win-Trojan/Midgare.30208 [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]	36,864 bytes
server.exe	%ProgramFiles%\bifrost\server.exe	36,864 bytes

Registry Modifications

• The following Registry Keys were created:
• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{DB1F86EE-9943-A713-E2D4-5DB27AF18F0B}
• 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\{DB1F86EE-9943-A713-E2D4-5DB27AF18F0B}]
• 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 Names were requested from a host database:
• 192.5.5.241
• banan2a.no-ip.info

• There was registered attempt to establish connection with the remote host. The connection details are:

Outbound traffic (potentially malicious)

• There was an outbound traffic produced on port 81: