Submission Summary:

• Submission details:
• Submission received: 22 October 2008, 16:57:02
• Processing time: 7 min 51 sec
• Submitted sample:
• File MD5: 0x0EA3E33890878BD1EC00255AEC51AA5B
• File SHA-1: 0x53C8ABCEABC569512B873855553A7D48E361AB52
• Filesize: 23,552 bytes
• Alias:
• Trojan.Win32.Buzus.abrk [Kaspersky Lab]
• Mal/Pushdo-A [Sophos]
• TrojanDropper:Win32/Cutwail.AL [Microsoft]

• 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! 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 file was created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%System%\rs32net.exe [file and pathname of the sample #1]	23,552 bytes	MD5: 0x0EA3E33890878BD1EC00255AEC51AA5B SHA-1: 0x53C8ABCEABC569512B873855553A7D48E361AB52	Trojan.Win32.Buzus.abrk [Kaspersky Lab] Mal/Pushdo-A [Sophos] TrojanDropper:Win32/Cutwail.AL [Microsoft]

• 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).

Memory Modifications

• There were new processes created in the system:

Process Name	Process Filename	Main Module Size
rs32net.exe	%System%\rs32net.exe	32,768 bytes
[filename of the sample #1]	[file and pathname of the sample #1]	32,768 bytes

Registry Modifications

• The newly created Registry Value is:
• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
• rs32net = "%System%\rs32net.exe"

so that rs32net.exe runs every time Windows starts

Other details

• There were registered attempts to establish connection with the remote hosts. The connection details are: