Submission Summary:

• Submission details:
• Submission received: 20 November 2008, 05:21:57
• Processing time: 6 min 41 sec
• Submitted sample:
• File MD5: 0xDA889656748CEEBADD64960EBB6FAD3D
• File SHA-1: 0xE3B529075FDA1338882A1AB95B96475F7F455B95
• Filesize: 18,944 bytes
• Alias:
• Mal/Emogen-Y [Sophos]
• TrojanDownloader:Win32/Cutwail.gen!B [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! Characteristics of the following security risk was identified in the system:

Security Risk	Description
Trojan-Downloader.Agent.BWH	Trojan-Downloader.Agent.BWH contacts a remote server in its attempt to secretly download additional threats onto affected machines.

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]	18,944 bytes	MD5: 0xDA889656748CEEBADD64960EBB6FAD3D SHA-1: 0xE3B529075FDA1338882A1AB95B96475F7F455B95	Mal/Emogen-Y [Sophos] TrojanDownloader:Win32/Cutwail.gen!B [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

• There were new memory pages created in the address space of the system process(es):

Process Name	Process Filename	Allocated Size
svchost.exe	%System%\svchost.exe	4,096 bytes
svchost.exe	%System%\svchost.exe	4,096 bytes
svchost.exe	%System%\svchost.exe	4,096 bytes
svchost.exe	%System%\svchost.exe	4,096 bytes

Registry Modifications

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

so that rs32net.exe runs every time Windows starts

• [HKEY_CURRENT_USER\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: