Exploit:Java/CVE-2012-4681.H identifies malicious Java Archive (JAR) files that exploit a known vulnerability.
The exploit files target a known vulnerability in the Java Runtime Environment; to prevent successful exploitation, please ensure you install the latest updates available for Java and/or remove any old, unnecessary installations.
To ensure you have the recommended version of Java installed on your system, please refer to the vendor's Verify Java version page.
F-Secure Anti-Virus will automatically clean the relevant files.
If you suspect a file has been wrongly identified by this detection (that is, it is a False Positive), you may elect to submit a sample of the file to our Labs for further analysis via:
The exploit file is most commonly 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: