Submission Summary:

• Submission details:
• Submission received: 19 October 2012, 11:14:39
• Processing time: 8 min 35 sec
• Submitted sample:
• File MD5: 0xB5B9E15410B82718F647A520DB99DEFB
• File SHA-1: 0x94A07F1D704300F0259AB4A08214F11514D02DB9
• Filesize: 667,462 bytes
• Alias:
• Trojan.Gen [Symantec]
• Trojan.Win32.Llac.aivt [Kaspersky Lab]
• Trojan.Win32.Llac [Ikarus]

• 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	%Temp%\15C03DB0	14 bytes	MD5: 0x126B6ED9F1112CB6D11AA4B581DAD3EC SHA-1: 0xC8B153D850D62BD201A7780D64981ECE9EC476DF	(not available)
2	%ProgramFiles%\Bifrost\server.exe [file and pathname of the sample #1]	667,462 bytes	MD5: 0xB5B9E15410B82718F647A520DB99DEFB SHA-1: 0x94A07F1D704300F0259AB4A08214F11514D02DB9	Trojan.Gen [Symantec] Trojan.Win32.Llac.aivt [Kaspersky Lab] Trojan.Win32.Llac [Ikarus]

• Notes:
• %Temp% is a variable that refers to the temporary folder in the short path form. By default, this is C:\Documents and Settings\[UserName]\Local Settings\Temp\ (Windows NT/2000/XP).
• %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
server.exe	%ProgramFiles%\Bifrost\server.exe	3,842,048 bytes
[filename of the sample #1]	[file and pathname of the sample #1]	3,842,048 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
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	%ProgramFiles%\bifrost\server.exe	36,864 bytes

Registry Modifications

• The following Registry Keys were created:
• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{15DA707E-3137-7E5A-5177-660103A1083D}
• 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
• HKEY_CURRENT_USER\Software\Enigma Protector
• HKEY_CURRENT_USER\Software\Enigma Protector\D32761FB9F472113-AE16D64F0E436B58
• HKEY_CURRENT_USER\Software\Enigma Protector\D32761FB9F472113-AE16D64F0E436B58\0E08B20982F12800-5668CC0A709B5FC7

• The newly created Registry Values are:
• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{15DA707E-3137-7E5A-5177-660103A1083D}]
• 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
• [HKEY_CURRENT_USER\Software\Enigma Protector\D32761FB9F472113-AE16D64F0E436B58\0E08B20982F12800-5668CC0A709B5FC7]
• A3463D28 = 4A B3 6C BF EA 48 36 EA 5D 20 3E 4D 1D 91

Other details

• To mark the presence in the system, the following Mutex object was created:
• Bif1234

• The following Host Name was requested from a host database:
• ali-hell.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: