Submission Summary:

• Submission details:
• Submission received: 11 September 2012, 20:41:36
• Processing time: 7 min 36 sec
• Submitted sample:
• File MD5: 0x8B3451B09A433B45D57148FBB2BDAC02
• File SHA-1: 0xB117908D23F1F16FD9AC243C2ABF0AEBD60499A0
• Filesize: 176,509 bytes
• Alias:
• Trojan.Gen [Symantec]
• Trojan.Win32.VBKrypt.lxxe [Kaspersky Lab]
• Backdoor:Win32/Bifrose.AE [Microsoft]

Technical Details:

• The new window was created, as shown below:

Possible Security Risk

• Attention! The following threat category was identified:

Threat Category	Description
	A malicious trojan horse or bot that may represent security risk for the compromised system and/or its network environment

File System Modifications

• The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%System%\gfddfg\dsfdscc.exe [file and pathname of the sample #1]	176,509 bytes	MD5: 0x8B3451B09A433B45D57148FBB2BDAC02 SHA-1: 0xB117908D23F1F16FD9AC243C2ABF0AEBD60499A0	Trojan.Gen [Symantec] Trojan.Win32.VBKrypt.lxxe [Kaspersky Lab] Backdoor:Win32/Bifrose.AE [Microsoft]
2	%System%\gfddfg\logg.dat	0 bytes	MD5: 0xD41D8CD98F00B204E9800998ECF8427E SHA-1: 0xDA39A3EE5E6B4B0D3255BFEF95601890AFD80709	(not available)

• 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).

• The following directory was created:
• %System%\gfddfg

Memory Modifications

• There were new processes created in the system:

• Attention! The following processes were intentionally hidden from the user:

Process Name	Main Module Size
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes
IEXPLORE.EXE	102,400 bytes

• There was a new memory page created in the address space of the system process(es):

Registry Modifications

• The following Registry Keys were created:
• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{CDC650B8-7C16-26FB-3676-1EDD346036D3}
• 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\{CDC650B8-7C16-26FB-3676-1EDD346036D3}]
• stubpath = "%System%\gfddfg\dsfdscc.exe s"

so that dsfdscc.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 = 01

Other details

• To mark the presence in the system, the following Mutex object was created:
• Bif1245

• There was application-defined hook procedure installed into the hook chain (e.g. to monitor keystrokes). The installed hook is handled by the following module:
• %ProgramFiles%\Internet Explorer\iexplore.exe

• Notes:
• %ProgramFiles% is a variable that refers to the Program Files folder. A typical path is C:\Program Files.

Outbound traffic (potentially malicious)

• There was an outbound traffic produced on port 81: