ThreatExpert Report: Trojan-Downloader.Win32.Agent.ctpn, Win-Trojan/Downloader.97280.R

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Submission Summary:

Submission details:

Submission received: 16 November 2009, 17:54:57
Processing time: 9 min 30 sec
Submitted sample:

File MD5: 0x379EEA227D62A661189518CF611191AF
File SHA-1: 0xF4B73B5DD2F23D35AB329DE950FFFED7185DB877
Filesize: 97,280 bytes
Alias:

Trojan-Downloader.Win32.Agent.ctpn [Kaspersky Lab]
Win-Trojan/Downloader.97280.R [AhnLab]

Summary of the findings:

What's been found	Severity Level
Downloads/requests other files from Internet.
Contains characteristics of an identified security risk.

Technical Details:

Possible Security Risk

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	[file and pathname of the sample #1]	97,280 bytes	MD5: 0x379EEA227D62A661189518CF611191AF SHA-1: 0xF4B73B5DD2F23D35AB329DE950FFFED7185DB877	Trojan-Downloader.Win32.Agent.ctpn [Kaspersky Lab] Win-Trojan/Downloader.97280.R [AhnLab]

The following directory was created:

%ProgramFiles%\AutoUtil

Note:

%ProgramFiles% is a variable that refers to the Program Files folder. A typical path is C:\Program Files.

Memory Modifications

There was a new process created in the system:

Process Name	Process Filename	Main Module Size
[filename of the sample #1]	[file and pathname of the sample #1]	114,688 bytes

Registry Modifications

The following Registry Key was created:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\AutoUtil

The newly created Registry Values are:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]

AutoUtil = "%ProgramFiles%\AutoUtil\AutoUtil.exe"

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\AutoUtil]

DisplayName = "AutoUtil Uninstall"
UninstallString = "%ProgramFiles%\AutoUtil\Uninstall.exe %ProgramFiles%\AutoUtil"

Other details

Analysis of the file resources indicate the following possible country of origin:

Republic of Korea

To mark the presence in the system, the following Mutex object was created:

AutoUtil

The following Host Name was requested from a host database:

autoutil.co.kr

The following HTTP URLs were started reading:

http://autoutil.co.kr/http://autoutil.co.kr/down/files.php
http://autoutil.co.kr/http://autoutil.co.kr/count/app_install.php?mac=

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