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Exploit:Java/Blackhole

Classification

Category: Malware

Type: Exploit

Platform: Java

Aliases: Exploit:Java/Blackhole, Exploit.java.blacole.[variant], Trojan.js.blacole.[variant]

Summary


Exploit:Java/Blackhole identifies a Java class module used as part of an exploit kit known as Blackhole.

Removal


Automatic action

Once detected, the F-Secure security product will automatically handle a harmful program or file by either deleting or renaming it.

Exploit Prevention

This exploit targets a known vulnerability in Java; to prevent successful exploitation, please ensure you install the latest updates available and/or remove any old, unnecessary installations.

For the latest updates, please refer to the vendor site:

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:Java/Blackhole identifies an exploit file used to exploit vulnerable installations of the Java Runtime Environment (JRE).

Update: A related detection, Trojan.script.478415, identifies scripts found in the HTML files delivered as attachments to spam emails sent out by the Blackhole exploit kit. These attachments use misleading file names such as:

  • invoices-[variable number].htm
  • HP-Scan-[variable number].htm
  • HP-Document-[variable number].htm
  • Delivery Status Notification
The Blackhole exploit kit

The exploit file is delivered by the highly-prevalent Blackhole exploit kit, a utility program used by attackers to silently install their malware onto a user's computer during a drive-by download attack.

The exploit kit is typically hosted on a short-lived webpage, and victims are driven to these pages by either hijacking traffic from a legitimate, compromised website, by redirecting traffic from search engines using Search Engine Optimization (SEO) poisoning, or through malicious links in spam emails.

Once a visitor is on the malicious page, the exploit kit silently probes the visitor's computer system for vulnerabilities in specific applications (in some cases, specific versions of these applications). Targeted applications include JRE, Media Player, Adobe Flash Player and Adobe Reader, and specific Windows components.

If found, the kit automatically exploits the vulnerabilities and downloads additional files (the kit's payload) onto the victim machine. The files downloaded by Blackhole onto the victim machine are usually other known malware, including:

For more information:

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