ThreatExpert Report: Trojan.Win32.Agent.suub, Trojan.Win32.Agent

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Submission Summary:

Submission details:

Submission received: 28 July 2012, 09:17:42
Processing time: 8 min 44 sec
Submitted sample:

File MD5: 0x4C1BE20E39E920AACBB8D0234A8D781D
File SHA-1: 0x6EAEF95B3F7CC7CC74624F569436B2EFFAAAF42B
Filesize: 602,104 bytes
Alias:

Trojan.Win32.Agent.suub [Kaspersky Lab]
Trojan.Win32.Agent [Ikarus]

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 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	[file and pathname of the sample #1]	602,104 bytes	MD5: 0x4C1BE20E39E920AACBB8D0234A8D781D SHA-1: 0x6EAEF95B3F7CC7CC74624F569436B2EFFAAAF42B	Trojan.Win32.Agent.suub [Kaspersky Lab] Trojan.Win32.Agent [Ikarus]

The following directory was created:

%AppData%\signup

Note:

%AppData% is a variable that refers to the file system directory that serves as a common repository for application-specific data. A typical path is C:\Documents and Settings\[UserName]\Application Data.

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]	618,496 bytes

Registry Modifications

The following Registry Keys were created:

HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\TabbedBrowsing
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall\signup
HKEY_CURRENT_USER\Software\iesignup

The newly created Registry Values are:

[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main]

Enable Browser Extensions = "no"

[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\TabbedBrowsing]

ShortcutBehavior = 0x00000000
PopupsUseNewWindow = 0x00000002
Enabled = 0x00000001
WarnOnClose = 0x00000000

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run]

signup = "%AppData%\signup\ie_signup.exe"

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall\signup]

DisplayIcon = "%AppData%\signup\sudelete.exe,0"
DisplayName = "signup"
UninstallString = ""%AppData%\signup\sudelete.exe""

[HKEY_CURRENT_USER\Software\iesignup]

User = "00CD1A40127682461"
Partner = "default"
dver = "20120728"

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:

down of SignUp

The following Host Names were requested from a host database:

down.signup.kr
www.keymatch.co.kr

The following HTTP URLs were started reading:

http://down.signup.kr/file/ie_signup.exe
http://www.keymatch.co.kr/chk_app/install_app.php?u=default&a=00CD1A40127682461&m=i&s=signup

Downloaded File Summary:

Download details:

Download retrieved: 28 July 2012 09:26:27
Processing time: 10 min 24 sec
Downloaded sample:

File MD5: 0x313B02CA5E3F09A94068EEFDC88572D5
File SHA-1: 0x4F54597DFB1B2A1AC0E8ED2D1395DB12BEEE4551
Filesize: 647,672 bytes

Summary of the findings:

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

Technical Details:

File System Modifications

The following file was created in the system:

#	Filename(s)	File Size	File Hash
1	[file and pathname of the sample #1]	647,672 bytes	MD5: 0x313B02CA5E3F09A94068EEFDC88572D5 SHA-1: 0x4F54597DFB1B2A1AC0E8ED2D1395DB12BEEE4551

The following directory was created:

%AppData%\signup

Note:

%AppData% is a variable that refers to the file system directory that serves as a common repository for application-specific data. A typical path is C:\Documents and Settings\[UserName]\Application Data.

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]	663,552 bytes

Registry Modifications

The following Registry Key was created:

HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\TabbedBrowsing

The newly created Registry Value is:

[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\TabbedBrowsing]

ShortcutBehavior = 0x00000000
PopupsUseNewWindow = 0x00000002
Enabled = 0x00000001
WarnOnClose = 0x00000000

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:

I am a SignUp

The following Host Names were requested from a host database:

down.signup.kr
www.keymatch.co.kr

The following HTTP URLs were started reading:

http://down.signup.kr/file/signup.dat
http://www.keymatch.co.kr/chk_app/boot_app.php?u=default&a=0000000000&m=l&s=signup

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