Submission Summary:

• Submission details:
• Submission received: 11 November 2009, 23:22:27
• Processing time: 6 min 35 sec
• Submitted sample:
• File MD5: 0xAAFDF34A928BDDB510CF4EDEF6CE7743
• File SHA-1: 0x0171F61A336E4EA09321114FBBF34E8947ACF1FA
• Filesize: 78,086 bytes
• Alias:
• Trojan-PSW.Generic [PCTools]
• Infostealer [Symantec]
• Troj/VB-EIP [Sophos]
• VirTool:Win32/VBInject.gen!AN [Microsoft]
• VirTool.Win32.VBInject [Ikarus]
• Win-Trojan/Refroso.78086 [AhnLab]

• Summary of the findings:

What's been found	Severity Level
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 keylogger program that can capture all user keystrokes (including confidential details such username, password, credit card number, etc.)

File System Modifications

• The following file was created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	[file and pathname of the sample #1] %System%\system32\system.exe	78,086 bytes	MD5: 0xAAFDF34A928BDDB510CF4EDEF6CE7743 SHA-1: 0x0171F61A336E4EA09321114FBBF34E8947ACF1FA	Trojan-PSW.Generic [PCTools] Infostealer [Symantec] Troj/VB-EIP [Sophos] VirTool:Win32/VBInject.gen!AN [Microsoft] VirTool.Win32.VBInject [Ikarus] Win-Trojan/Refroso.78086 [AhnLab]

• 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%\system32

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%\system32\system.exe s"

so that system.exe runs every time Windows starts

• [HKEY_LOCAL_MACHINE\SOFTWARE\Bifrost]
• nck = C8 4F E1 77 AD 44 A2 32 74 C3 CD 74 FA 93 5B 67
• [HKEY_CURRENT_USER\Software\Bifrost]
• klg = 00