Research

New Exploit Targeting Java Vulnerability Found in BlackHole Arsenal

On 3 December, we noted a rapid growth in the number of detections for exploits targeting the vulnerability CVE-2011-3544 in Java virtual machine. The vulnerability was published on 18 October, but malicious users have only recently begun to make active use of it. It can be used by exploits in drive-by attacks to download and launch malicious programs.

Number of unique detections of Exploit.Java.CVE-2011-3544

According to KSN data, most of the exploits targeting CVE-2011-3544 are used in the BlackHole Exploit Kit, which is currently the most popular exploit pack.

We analyzed the latest BlackHole kits. The sites that carry out drive-by attacks with the help of BlackHole turned up quite an old exploit – a PDF file that targets the vulnerability CVE-2010-0188, and a new Java exploit targeting the vulnerability CVE-2011-3544. The corresponding files are circled in red in the screenshot below.

A screenshot of the list of files intercepted when visiting websites where BlackHole is installed

Brian Krebs reports that the creators of BlackHole have successfully integrated the new exploit into their kit. According to KSN statistics, the new exploits attack users in Russia, the US, the UK and Germany. This appears to be related to the fact that new exploits that are integrated in BlackHole and target the vulnerability CVE-2011-3544, install the Trojan Carberp that steals banking data, as well as SMS blockers. SMS blockers are mostly used in Russia, while Trojan bankers attack users in developed countries.

Once again we see that malware writers are forging ahead and are continually improving their creations. It is, therefore, critical that all users install Java updates from Oracle in a timely manner. The patch for (among other things) the CVE-2011-3544 vulnerability can be downloaded here.

New Exploit Targeting Java Vulnerability Found in BlackHole Arsenal

Your email address will not be published. Required fields are marked *

 

Reports

APT trends report Q2 2021

This is our latest summary of advanced persistent threat (APT) activity, focusing on significant events that we observed during Q2 2021: attacks against Microsoft Exchange servers, APT29 and APT31 activities, targeting campaigns, etc.

LuminousMoth APT: Sweeping attacks for the chosen few

We recently came across unusual APT activity that was detected in high volumes, albeit most likely aimed at a few targets of interest. Further analysis revealed that the actor, which we dubbed LuminousMoth, shows an affinity to the HoneyMyte group, otherwise known as Mustang Panda.

WildPressure targets the macOS platform

We found new malware samples used in WildPressure campaigns: newer version of the C++ Milum Trojan, a corresponding VBScript variant with the same version number, and a Python script working on both Windows and macOS.

Ferocious Kitten: 6 years of covert surveillance in Iran

Ferocious Kitten is an APT group that has been targeting Persian-speaking individuals in Iran. Some of the TTPs used by this threat actor are reminiscent of other groups, such as Domestic Kitten and Rampant Kitten. In this report we aim to provide more details on these findings.

Subscribe to our weekly e-mails

The hottest research right in your inbox