Submission Summary:

• Submission details:
• Submission received: 6 September 2012, 16:28:33
• Processing time: 7 min 48 sec
• Submitted sample:
• File MD5: 0xE15AF9704F84B162310303A63D489BDA
• File SHA-1: 0xCE241D840F732354E4F5239015088C8D2DEA6478
• Filesize: 259,965 bytes
• Alias: Trojan.SuspectCRC [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:

• The new window was created, as shown below:

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.

File System Modifications

• The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%Temp%\dw.log	152 bytes	MD5: 0x685D8E66B0EDA23C09806C555B633E94 SHA-1: 0xB97041D248A361E90413E1739B9F2C24E540030D	(not available)
2	%ProgramFiles%\Bifrost\server.exe [file and pathname of the sample #1]	259,965 bytes	MD5: 0xE15AF9704F84B162310303A63D489BDA SHA-1: 0xCE241D840F732354E4F5239015088C8D2DEA6478	Trojan.SuspectCRC [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
[filename of the sample #1]	[file and pathname of the sample #1]	36,864 bytes
DW20.EXE	C:\PROGRA~1\COMMON~1\MICROS~1\DW\DW20.EXE	794,624 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\{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 = "%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 Name was requested from a host database:
• 192.5.5.241

• 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: