Exploit kit activity has fallen considerably since last year, but new variants are being developed, one of the latest being the Disdain exploit kit.

An exploit kit is a web-based toolkit capable of probing web users’ browsers for vulnerabilities. If vulnerabilities are discovered, they can be exploited to silently download ransomware and malware.

All that is required for an attack to take place is for web users to be directed to the domain hosting the exploit kit and for them to have a vulnerable browser or out of date plugin. Currently, the author of the Disdain exploit kit claims his/her toolkit can exploit more than a dozen separate vulnerabilities in Firefox, IE, Edge, Flash and Cisco WebEx – Namely, CVE-2017-5375, CVE-2016-9078, CVE-2014-8636, CVE-2014-1510, CVE-2013-1710, CVE-2017-0037, CVE-2016-7200, CVE-2016-0189, CVE-2015-2419, CVE-2014-6332, CVE-2013-2551, CVE-2016-4117, CVE-2016-1019, CVE-2015-5119, and CVE-2017-3823. Many of those exploits are recent and would have a high chance of success.

No malware distribution campaigns have so far been identified using the Disdain exploit kit, although it is likely to just be a matter of time before attacks are conducted. The Disdain exploit kit has only just started being offered on underground forums.

Fortunately, the developer does not have a particularly good reputation on the forums, which is likely to slow the use of the exploit kit. However, it is being offered at a low price which may tempt some malware distributors to start conducting campaigns. The EK can be rented for as little as $80 a day, with discounts being offered for weekly and monthly use. The Disdain exploit kit is being offered for considerably less than some of the other exploit kits currently being touted on the forums, including the Nebula EK.

All that is required is for someone to rent the kit, provide the malicious payload, and direct traffic to the domain hosting the Disdain exploit kit – such as via a malvertising campaign or botnet. The price and capabilities of the EK mean it has potential to become a major threat.

Protecting Your Business from Online Threats

Cybercriminals may be favouring spam email over exploit kits for delivering malware, although the threat of web-based attacks should not be ignored. To a large extent, good patch management practices can reduce the risk of exploit kit attacks, although not entirely. Exploit kits are frequently updated with new vulnerabilities for which patches have yet to be released. If end users are directed to domains hosting exploit kits, malware and ransomware downloads can be expected.

Along with prompt patching, businesses should consider implementing a web filtering solution. A web filter can be configured to carefully control the websites that end users can visit. A web filter will block access to all webpages known to host malware or contain exploit kits. Risky categories of website, which end users have no work purpose for visiting, can also easily be blocked reducing the risk of phishing attacks and improving employee productivity.

An appliance-based web filter can be costly to implement and can have a negative effect on Internet speed. A DNS-based web filter on the other hand requires no hardware purchases and has no latency. Internet speed is unaffected. Since a web filter can also be used to restrict access to websites that take up a lot of bandwidth, Internet speeds for all can actually improve.

WebTitan Cloud – and WebTitan Cloud for WiFi – are DNS-based web filtering solutions for enterprises that allow precision control over the sites that can be accessed by end users and offer excellent protection against web-based threats such as exploit kits and phishing websites.

The solutions require no hardware purchases, no software downloads, there is no latency, and they are highly scalable. Implementing and configuring the solutions is quick and easy and they require minimal maintenance.

WebTitan is also ideal for MSPs, being available in full white-label form with a choice of hosting options – including hosting in an MSPs environment.

If you want to improve the productivity of your workforce and effectively manage online threats – or offer web filtering to your clients – contact the TitanHQ team today to discuss your options and register for a free trial.