Submission Summary:

• Submission details:
• Submission received: 19 October 2012, 05:18:14
• Processing time: 8 min 24 sec
• Submitted sample:
• File MD5: 0xDA82B9F703448AB4840E37F6089D6D5A
• File SHA-1: 0x109594EF771B462487105EF45A539970EBF2BD28
• 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]

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%\spool\spool.exe [file and pathname of the sample #1]	32,669 bytes	MD5: 0xDA82B9F703448AB4840E37F6089D6D5A SHA-1: 0x109594EF771B462487105EF45A539970EBF2BD28	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%\spool

Memory Modifications

• There were new processes created in the system:

Process Name	Process Filename	Main Module Size
spool.exe	%ProgramFiles%\spool\spool.exe	36,864 bytes
[filename of the sample #1]	[file and pathname of the sample #1]	36,864 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\spool
• HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\MediaResources\msvideo
• HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\MediaResources\msvideo
• HKEY_CURRENT_USER\Software\spool

• The newly created Registry Values are:
• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{9D71D88C-C598-4935-C5D1-43AA4DB90836}]
• stubpath = "%ProgramFiles%\spool\spool.exe s"

so that spool.exe runs every time Windows starts

• [HKEY_LOCAL_MACHINE\SOFTWARE\spool]
• nck = DA 0E EF 29 A0 44 A2 32 74 C3 CD 74 FA 93 5B 67
• [HKEY_CURRENT_USER\Software\spool]
• klg = 00

Other details

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

• The following Host Name was requested from a host database:
• midoahmed.zapto.org

• 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: