ThreatExpert Report: Trojan.Win32.Agent2.fjaf, Trojan.Win32.Agent

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Submission Summary:

Submission details:

Submission received: 20 September 2012, 23:10:28
Processing time: 9 min 29 sec
Submitted sample:

File MD5: 0x5605B5E190BED714E019332B9FAEC2EB
File SHA-1: 0x7005B8B84DAB98F96F5D62DEA59F9A88D33A5A55
Filesize: 36,864 bytes
Alias:

Trojan.Win32.Agent2.fjaf [Kaspersky Lab]
Trojan.Win32.Agent [Ikarus]

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	%ProgramFiles%\Windows NT\gserver.exe [file and pathname of the sample #1]	36,864 bytes	MD5: 0x5605B5E190BED714E019332B9FAEC2EB SHA-1: 0x7005B8B84DAB98F96F5D62DEA59F9A88D33A5A55	Trojan.Win32.Agent2.fjaf [Kaspersky Lab] Trojan.Win32.Agent [Ikarus]

Note:

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

Memory Modifications

There were new processes created in the system:

Process Name	Process Filename	Main Module Size
[filename of the sample #1]	[file and pathname of the sample #1]	36,864 bytes
gserver.exe	%ProgramFiles%\windows nt\gserver.exe	36,864 bytes

Registry Modifications

The following Registry Keys were created:

HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications
HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\gserver
HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\gserver\Settings

The newly created Registry Value is:

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

gserver = "%ProgramFiles%\Windows NT\gserver.exe"

so that gserver.exe runs every time Windows starts

Other details

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

China

The following Host Name was requested from a host database:

www.92ddos.com

There was registered attempt to establish connection with the remote host. The connection details are:

Remote Host	Port Number
www.92ddos.com	10103

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