The reason Netflix represents one third of Internet traffic during peak hours in the evening, and also that it works on the Microsoft Silverlight platform, it is simply attracting a combo for the online hackers to pass up. Within the 2nd occasion during the 6 months time, criminal hacker communities were zeroing upon Silverlight vulnerabilities so that it could spread out malware which leads to system compromise and also loss of data for the victims. Now, hackers have gained access to another popular online ad community, AppNexus, through malvertising which redirects victims, usually over many hops, on malicious sites hosting on the Angler Exploit Kit, that has been equipped with a number of exploits for the Silverlight vulnerabilities. Silverlight, very much the similar to the Adobe Flash, is the plug-in of Microsoft’s streaming media on different web browser which is perhaps the most recognized for getting used in the Netflix’s video streaming service.
While watching Netflix on your browser, you must be aware, just before even you start watching a movie or any television program, installation of a Silverlight plug-in was mandatory. Very much like Adobe Flash, Silverlight deals with rich media content on MS Windows & Mac OS X. Additionally, there is an unauthorized Linux clone. Netflix is not the one service which uses Silverlight, however it is probably the most popular one. The techniques cyber criminals use in order to take advantage of Silverlight might appear complicated, however they are easy in practice. The criminals initial infiltrated the AppNexus through its corporate networks in order to put malicious advertisements throughout the Web. It is based in New York, an online marketing and advertising company.
The researchers in Cisco spiked during 7th May and 13th May, accounting as higher as 18% from the overall HTTP requests for the sites that hosting the kit. The kit of this campaign equally hosts exploits for the Flash and Java, although not any of the Java exploits were triggered. Victims have been effected through drive, by downloads in which a malicious advertisements redirects web browser to some other malicious banner that redirects it back on to the Angler Exploit Kit landing-page. The moment it is there, the exploit is sent and the Trojan makes a link among the effected computer as well as a remote server, that Cisco has confirmed to be based in Brazil. Hackers behind the campaign are most likely banking on the belief that the industry has already been consumed with the Flash and Java exploits, each of which have already been patched several times during the past 2 years, and now have started to target Silverlight. Although this Silverlight campaign was quieted down because vendors like Cisco have included detection signatures and also abilities for the same, this has been a significant dip in waters for such attackers. DNS requests for these types of Angler domains have always been spread out around the different parts of the world, focused greatly in the Europe and the North America.
During the month of November, exploit code targeting 2 memory vulnerabilities in the Silverlight surface, although the bugs had been fixed during the month of March by the Microsoft. Cisco anticipates even more Silverlight exploits in order to surface with nearly 60 % of RIA supporting it. According to Craig Williams, Technical Leader, TRAC ( Threat Research Analysis and Communications) in Cisco, Java and Flash have always been greatly exploited for many years, while the vendors are growing effective in writing engines which identify vulnerabilities out of those libraries. Silverlight hasn’t been exploited a lot. There are a few limited CVEs, however some are widespread. He said that they would be looking at a tipping point in which Java exploits could be identified and any alternative formats which criminals might take advantage from. According to another Technical Leader, Levi Gundert at Threat Research Analysis and Communications (TRAC) at Cisco, This delivery uses moving XOR encryption to obfuscate exactly what was happening. This one was an essential update in the campaign. He further informed that, this suggests that possibly they are very committed exactly what they are doing. Obfuscation makes this a challenge to detect and it is very clear that they wish to evade researchers.
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