Submission Summary:

• Submission details:
• Submission received: 11 November 2009, 07:52:27
• Processing time: 5 min 45 sec
• Submitted sample:
• File MD5: 0x7841B73F2BA4D23CB4ACEE53DB089493
• File SHA-1: 0xEB82E9AED9E155A481BC6970A87330C672022903
• Filesize: 57,344 bytes
• Alias:
• Packed.Generic.266 [Symantec]
• Trojan.Win32.Buzus.clys [Kaspersky Lab]
• Mal/Inject-Gen [Sophos]
• VirTool:Win32/VBInject.gen!CN [Microsoft]

• Summary of the findings:

What's been found	Severity Level
Downloads/requests other files from Internet.
Installs a default debugger that is injected into the execution sequence of a target application. If a threat is installed as a default debugger, it will be run every time a target application is attempted to be launched - either to mimic it and hide its own presence (e.g. an open port or a running process), or simply to be activated as often as possible.
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
Trojan-Dropper.Agent	Trojan-Dropper.Agent attempts to drop a malicious file and run it on the compromised computer.

• 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	%ProgramFiles%\Microsoft Common\svchost.exe	57,344 bytes	MD5: 0x7841B73F2BA4D23CB4ACEE53DB089493 SHA-1: 0xEB82E9AED9E155A481BC6970A87330C672022903	Packed.Generic.266 [Symantec] Trojan.Win32.Buzus.clys [Kaspersky Lab] Mal/Inject-Gen [Sophos] VirTool:Win32/VBInject.gen!CN [Microsoft]
2	%Windir%\Temp\rdl1.tmp	0 bytes	MD5: 0xD41D8CD98F00B204E9800998ECF8427E SHA-1: 0xDA39A3EE5E6B4B0D3255BFEF95601890AFD80709	(not available)

• Notes:
• %ProgramFiles% is a variable that refers to the Program Files folder. A typical path is C:\Program Files.
• %Windir% is a variable that refers to the Windows installation folder. By default, this is C:\Windows or C:\Winnt.

• The following directory was created:
• %ProgramFiles%\Microsoft Common

Registry Modifications

• The following Registry Key was created:
• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe

• The newly created Registry Values are:
• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe]
• Debugger = "%ProgramFiles%\Microsoft Common\svchost.exe"

so that svchost.exe is injected into the execution sequence of explorer.exe by being installed as its default debugger

• [HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
• ProxyEnable = 0x00000000

• The following Registry Value was modified:
• [HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
• Cookies =
• Cache =
• History =

Other details

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

• The data identified by the following URL was then requested from the remote web server:
• http://121.12.170.177/ld/ld.php?v=1&rs=13441600&n=1&uid=1