Submission Summary:

• Submission details:
• Submission received: 9 February 2010, 21:06:48
• Processing time: 12 min 1 sec
• Submitted sample:
• File MD5: 0x17A5391BCD17AAF21A6AFB5D52EE299D
• File SHA-1: 0xF49D8C0A64FDA9BFA68605420CA398EC2A7C6E0F
• Filesize: 166,270 bytes

• Summary of the findings:

What's been found	Severity Level
Produces outbound traffic.
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.

• Attention! The following threat categories were identified:

Threat Category	Description
	A malicious backdoor trojan that runs in the background and allows remote access to the compromised system
	A virus capable to modify other files by infecting, prepending, or overwriting them them with its own body

File System Modifications

• The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%AppData%\Bifrost\logg.dat %System%\Bifrost\logg.dat	0 bytes	MD5: 0xD41D8CD98F00B204E9800998ECF8427E SHA-1: 0xDA39A3EE5E6B4B0D3255BFEF95601890AFD80709	(not available)
2	%AppData%\Bifrost\server.exe %ProgramFiles%\server_crypt.exe %System%\Bifrost\server.exe	30,589 bytes	MD5: 0xE8D3C7ABA1FC53AA52A12AAE054866A3 SHA-1: 0x90FD6753F05559CD97CD6B35E0B47385DC321642	Trojan.Midgare.hhn [PCTools] Backdoor.Bifrose [Symantec] BKDR_AHZE.SMM [Trend Micro] Backdoor:Win32/Bifrose.HM [Microsoft]
3	%ProgramFiles%\gamazer.3.exe	57,344 bytes	MD5: 0x94FDBE08885E98AB92FD8A3F110F6C72 SHA-1: 0x09B315E939CF89FDC29BD85A2F33406B79703A96	Malware.Virut [PCTools] W32.Virut.CF [Symantec] Virus.Win32.Virut.ce [Kaspersky Lab] W32/Virut.n.gen [McAfee] W32/Scribble-B [Sophos] Virus:Win32/Virut.BM [Microsoft] Win32/Virut.F [AhnLab]
4	[file and pathname of the sample #1]	166,270 bytes	MD5: 0x17A5391BCD17AAF21A6AFB5D52EE299D SHA-1: 0xF49D8C0A64FDA9BFA68605420CA398EC2A7C6E0F	(not available)

• Notes:
• %AppData% is a variable that refers to the file system directory that serves as a common repository for application-specific data. A typical path is C:\Documents and Settings\[UserName]\Application Data.
• %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).
• %ProgramFiles% is a variable that refers to the Program Files folder. A typical path is C:\Program Files.

• The following directories were created:
• %AppData%\Bifrost
• %System%\Bifrost

Memory Modifications

• There were new processes created in the system:

Process Name	Process Filename	Main Module Size
gamazer.3.exe	%ProgramFiles%\gamazer.3.exe	57,344 bytes
[filename of the sample #1]	[file and pathname of the sample #1]	135,168 bytes

Registry Modifications

• The following Registry Keys were created:
• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\@ctive Setup
• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\@ctive Setup\Installed Components
• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\@ctive 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\Microsoft\Windows\CurrentVersiontInternet Settings
• HKEY_CURRENT_USER\Software\Bifrost
• HKEY_CURRENT_USER\Software\WinRAR SFX

• The newly created Registry Values are:
• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\@ctive Setup\Installed Components\{9D71D88C-C598-4935-C5D1-43AA4DB90836}]
• stubpath = "%System%\Bifrost\server.exe s"
• [HKEY_LOCAL_MACHINE\SOFTWARE\Bifrost]
• nckTWexplorer.exe = 6E 9F 54 9A 10 95 82 F5 95 20 13 99 26 4F B8 67
• [HKEY_CURRENT_USER\Software\Bifrost]
• klg = 01
• [HKEY_CURRENT_USER\Software\WinRAR SFX]
• C%%Program Files = "C:\Program Files"

Other details

• Analysis of the file resources indicate the following possible country of origin:

	Russian Federation

• To mark the presence in the system, the following Mutex objects were created:
• Bif1234
• likl

• The following Host Name was requested from a host database:
• gnooon.no-ip.biz

• 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

Outbound traffic (potentially malicious)

• There was an outbound traffic produced on port 3460: