Threat Description

Exploit:​JS/Agent.IHL

Details

Aliases:Exploit:​JS/Agent.IHL
Category:Malware
Type:Exploit
Platform:JS

Summary



Exploit:JS/Agent.IHL is JavaScript, usually found on malicious or compromised websites.

It is used to silently install malicious software onto the website visitor's system.



Removal


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More

You may wish to refer to the Support Community for further assistance. You also may also refer to General Removal Instructions for a general guide on alternative disinfection actions.



Technical Details



Exploit

Exploit:JS/Agent.IHL is JavaScript code that exploits a vulnerability found in versions of Microsoft Internet Explorer.

This exploit targets Internet Explorer 7 in and works on the Windows XP and Windows Server 2003 operating systems.

Note: It appears that this exploit may also work on Vista SP0 and SP1.

The exploit can be recognized as shown in the picture below:

If the exploit successfully executes, it will download a malicious file from the following URL address:

  • http://www.steoo.com/[...]/win.exe

We detect the downloaded file as Trojan:W32/Agent.IHN.

Vulnerability

Please see the following report for additional information on the vulnerability used:

Note: To be clear, scripts used by this particular exploit target IE7 while the vulnerability itself affects all versions of IE.

Network Connections

Attempts to connect with HTTP to:

  • http://www.steoo.com/[...]/win.exe





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