ThreatExpert Report

Submission Summary:

Submission details:

Submission received: 9 December 2008, 03:01:09
Processing time: 6 min 53 sec
Submitted sample:

File MD5: 0xCD37EF7D02F3688C2C7500C7883364FE
File SHA-1: 0xC1AE22A3FCA4C22DEDBF26140960AB36371DA6BA
Filesize: 22,528 bytes

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
1	%System%\rs32net.exe [file and pathname of the sample #1]	22,528 bytes	MD5: 0xCD37EF7D02F3688C2C7500C7883364FE SHA-1: 0xC1AE22A3FCA4C22DEDBF26140960AB36371DA6BA

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:

Remote Host	Port Number
91.203.92.189	80
70.38.68.137	80
216.195.56.22	80

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