Submission Summary:

• Submission details:
• Submission received: 6 September 2012, 15:19:08
• Processing time: 8 min 16 sec
• Submitted sample:
• File MD5: 0x96B5C8E7FED385784511B3B3687CBED7
• File SHA-1: 0xAE83E1D472748E41F7995E960D00AAE731F9D663
• Filesize: 407,421 bytes
• Alias & packer info:
• Trojan.Gen.2 [Symantec]
• Trojan.SuspectCRC [Ikarus]
• packed with: PE_Patch [Kaspersky Lab]

• 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 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%\Bifrost\logg.dat	0 bytes	MD5: 0xD41D8CD98F00B204E9800998ECF8427E SHA-1: 0xDA39A3EE5E6B4B0D3255BFEF95601890AFD80709	(not available)
2	%System%\Bifrost\server.exe	407,421 bytes	MD5: 0x96B5C8E7FED385784511B3B3687CBED7 SHA-1: 0xAE83E1D472748E41F7995E960D00AAE731F9D663	Trojan.Gen.2 [Symantec] Trojan.SuspectCRC [Ikarus] packed with PE_Patch [Kaspersky Lab]

• 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%\Bifrost

Memory Modifications

• There were new processes created in the system:

Process Name	Process Filename	Main Module Size
server.exe	%System%\Bifrost\server.exe	35,168 bytes
[filename of the sample #1]	[file and pathname of the sample #1]	1,433,600 bytes

• 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):

Process Name	Process Filename	Allocated Size
server.exe	%System%\bifrost\server.exe	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\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%\Bifrost\server.exe s"

so that server.exe runs every time Windows starts

• [HKEY_LOCAL_MACHINE\SOFTWARE\Bifrost]
• nck = CE 11 EF 21 A0 21 A2 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:
• Bif1234

• The following Host Names were requested from a host database:
• s7ak.no-ip.biz
• 192.5.5.241

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

• 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: