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
Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
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Check for the latest database updates
First check if your F-Secure security program is using the latest updates, then try scanning the file again.
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Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
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Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note: You need administrative rights to change the settings.
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
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