Encyclopedia entry: Exploit:HTML/IframeRef.ge...

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Home >Learn more about malware > Research Exploit:HTML/IframeRef.gen

Exploit:HTML/IframeRef.gen
(?)
Encyclopedia entry
Updated: Nov 10, 2010  |  Published: Jun 27, 2007
Aliases
HTML/Psyme (AhnLab) Trojan.Clicker.HTML.Iframe.W (BitDefender) HTML/Scoati (CA) Trojan-Spy.HTML.Fraud.gen (Kaspersky) Troj/Fujif-Gen (Sophos) Trojan.Dowiex!inf (Symantec) HTML_IFRAME.BL (Trend Micro)
Alert Level(?)
Severe
Antimalware protection details
Microsoft recommends that you download thelatest definitions to get protected. Detection last updated:
Definition: 1.95.141.0
Released: Nov 18, 2010 Detection initially created:
Definition: 1.45.287.0
Released: Oct 07, 2008
On this page
Summary|Symptoms|Technical Information|Prevention|Recovery
Summary
Exploit:HTML/IframeRef.gen is generic detection for specially formed IFrame tags that point to remote Web sites containing malicious content, for example malicious Javascript containing an exploit for a specific vulnerability.
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Symptoms
There are no common symptoms associated with this threat - links are activated within IFrames while viewing Web content on maliciously modified pages. Alert notifications from installed antivirus software may be the only symptom(s).
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Technical Information (Analysis)
Exploit:HTML/IframeRef.gen is generic detection for specially formed IFrame tags that point to remote Web sites containing malicious content, for example malicious Javascript containing an exploit for a specific vulnerability.
Installation
An IFRAME is a valid HTML element which allows content from a separate page or Web site to be embedded in other Web site pages. In the case of Exploit:HTML/IframeRef.gen, a malicious IFrame is appended at the end of local html files. The rendered IFrame may be only one pixel in length to avoid being spotted by the user.
Exploit:HTML/IframeRef.gen requires that a user view or visit the Web sites or open the HTML page in order for malicious action to occur.
Analysis by Cristian Craioveanu
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Prevention
Take the following steps to help prevent infection on your computer:
Enable a firewall on your computer.
Get the latest computer updates for all your installed software.
Use up-to-date antivirus software.
Limit user privileges on the computer.
Use caution when opening attachments and accepting file transfers.
Use caution when clicking on links to web pages.
Avoid downloading pirated software.
Protect yourself against social engineering attacks.
Use strong passwords.
Enable a firewall on your computer
Use a third-party firewall product or turn on the Microsoft Windows Internet Connection Firewall.
How to turn on the Windows Firewall in Windows 7
How to turn on the Windows Firewall in Windows Vista
How to turn on the Windows firewall in Windows XP
Get the latest computer updates
Updates help protect your computer from viruses, worms, and other threats as they are discovered. It is important to install updates for all the software that is installed in your computer. These are usually available from vendor websites.
You can use the Automatic Updates feature in Windows to automatically download future Microsoft security updates while your computer is on and connected to the Internet.
How to turn on Automatic Updates in Windows 7
How to turn on Automatic Updates in Windows Vista
How to turn on Automatic Updates in Windows XP
Use up-to-date antivirus software
Most antivirus software can detect and prevent infection by known malicious software. To help protect you from infection, you should always run antivirus software, such asMicrosoft Security Essentials, that is updated with the latest signature files. For more information, seehttp://www.microsoft.com/security/antivirus/av.aspx.
Limit user privileges on the computer
Starting with Windows Vista and Windows 7, Microsoft introduced User Account Control (UAC), which, when enabled, allowed users to run with least user privileges. This scenario limits the possibility of attacks by malware and other threats that require administrative privileges to run.
You can configure UAC in your computer to meet your preferences:
User Account Control in Windows 7
User Account Control in Windows Vista
Applying the Principle of Least Privilege in Windows XP
More on User Account Control
Use caution when opening attachments and accepting file transfers
Exercise caution with email and attachments received from unknown sources, or received unexpectedly from known sources.  Use extreme caution when accepting file transfers from known or unknown sources.
Use caution when clicking on links to web pages
Exercise caution with links to web pages that you receive from unknown sources, especially if the links are to a webpage that you are not familiar with, unsure of the destination of, or suspicious of. Malicious software may be installed in your computer simply by visiting a webpage with harmful content.
Avoid downloading pirated software
Threats may also be bundled with software and files that are available for download on various torrent sites. Downloading "cracked" or "pirated" software from these sites carries not only the risk of being infected with malware, but is also illegal. For more information, see 'The risks of obtaining and using pirated software'.
Protect yourself from social engineering attacks
While attackers may attempt to exploit vulnerabilities in hardware or software to compromise a computer, they also attempt to exploit vulnerabilities in human behavior to do the same. When an attacker attempts to take advantage of human behavior to persuade the affected user to perform an action of the attacker's choice, it is known as 'social engineering'. Essentially, social engineering is an attack against the human interface of the targeted computer. For more information, see 'What is social engineering?'.
Use strong passwords
Attackers may try to gain access to your Windows account by guessing your password. It is therefore important that you use a strong password – one that cannot be easily guessed by an attacker. A strong password is one that has at least eight characters, and combines letters, numbers, and symbols. For more information, seehttp://www.microsoft.com/protect/yourself/password/create.mspx.
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Recovery
To detect and remove this threat and other malicious software that may be installed in your computer, run a full-system scan with an up-to-date antivirus product such as the following:
Microsoft Security Essentials
For more information on antivirus software, seehttp://www.microsoft.com/windows/antivirus-partners/.
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