One more avatar of Nuclear Exploit Kit (Feb 6th, 2015)


Dell Sonicwall Threats Research team has recently observed an update in Nuclear Exploit Kit. The Exploit kit has added in its arsenal the latest Adobe Flash Exploit CVE-2015-0311. In addition to the new exploit, there is an update in the landing page.

Until now the landing page had obfuscated plugin detect library to determine version of Java, Adobe Flash, Adobe Reader & Silverlight plugins installed in the browser. It would then serve the corresponding exploit to compromise the user system.

But in this update we have not seen any plugin detection library and Kit targets Adobe Flash and Silverlight plugins only.

Fig-1 : old DeObfuscated Nuclear Exploit Kit landing page
Fig-2 : latest DeObfuscated Nuclear Exploit Kit landing page

On successful exploitation additional malware will be downloaded into the system. During our analysis we observed payload to be a Downloader.

Having up to date software will help in mitigating this Exploit Kit. Dell Sonicwall Threats Research team will keep on monitoring this Exploit Kit and add update mitigation signatures as required.

SonicWALL Gateway AntiVirus provides protection against this threat via the following signatures:

  • GAV: MalSWF ( Trojan )

  • GAV: MalAgent.G ( Trojan )

Security News
The SonicWall Capture Labs Threat Research Team gathers, analyzes and vets cross-vector threat information from the SonicWall Capture Threat network, consisting of global devices and resources, including more than 1 million security sensors in nearly 200 countries and territories. The research team identifies, analyzes, and mitigates critical vulnerabilities and malware daily through in-depth research, which drives protection for all SonicWall customers. In addition to safeguarding networks globally, the research team supports the larger threat intelligence community by releasing weekly deep technical analyses of the most critical threats to small businesses, providing critical knowledge that defenders need to protect their networks.