Submission Summary:

• Submission details:
• Submission received: 1 December 2008, 15:29:25
• Processing time: 6 min 44 sec
• Submitted sample:
• File MD5: 0xDCC400E2960C0A52B6E51B6E531E3F24
• File SHA-1: 0x7EA193656A9B08C7B224348B06A94C8E83DCB81C
• Filesize: 31,232 bytes
• Alias:
• Downloader [Symantec]
• Trojan-Downloader.Win32.Small.aeqm [Kaspersky Lab]
• Spy-Agent.bv.dldr [McAfee]
• Troj/DwnlDr-HIS [Sophos]
• TrojanDropper:Win32/Cutwail.AR [Microsoft]
• Trojan-Dropper.SML [Ikarus]

• Summary of the findings:

What's been found	Severity Level
Downloads/requests other files from Internet.
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.

• Attention! The following threat category was identified:

Threat Category	Description
	A program that downloads files to the local computer that may represent security risk

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]	31,232 bytes	MD5: 0xDCC400E2960C0A52B6E51B6E531E3F24 SHA-1: 0x7EA193656A9B08C7B224348B06A94C8E83DCB81C	Downloader [Symantec] Trojan-Downloader.Win32.Small.aeqm [Kaspersky Lab] Spy-Agent.bv.dldr [McAfee] Troj/DwnlDr-HIS [Sophos] TrojanDropper:Win32/Cutwail.AR [Microsoft] Trojan-Dropper.SML [Ikarus]

• 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	204,800 bytes
[filename of the sample #1]	[file and pathname of the sample #1]	204,800 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:

• The data identified by the following URLs was then requested from the remote web server:
• http://astana1988.freehostia.com
• http://astana.exofire.net