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Exploit:JS/Agent.IHL

Classification

Category: Malware

Type: Exploit

Aliases: Exploit:JS/Agent.IHL

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

Based on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the detected program or file, or ask you for a desired action.

Knowledge Base

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About the product

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Submit a sample

Submit a file or URL for further analysis.

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:

  • https://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:

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