Email may be the primary vector used in phishing attacks, but the second quarter of 2017 has seen a massive increase in malvertising phishing attacks.
Malvertising is the term given to malicious adverts, which are often displayed on high-traffic websites via third party advertising networks. These adverts are used to direct web visitors to malicious websites, oftentimes sites containing exploit kits that probe for vulnerabilities and silently download ransomware and other malware.
These malware attacks increased between 2015 and 2016, with the total number of malvertising attacks rising by 136%. Demonstrating how quickly the threat landscape changes, between Q1 and Q2, 2017 there was a noticeable decline in malicious advert-related exploit kit and malware attacks. Exploit kit redirects fell by 24% and malware-related adverts fell by almost 43%, according to a recent study released by RiskIQ.
However, the study shows there was a massive increase in malvertising phishing attacks with cybercriminals changing their tactics. Phishing-related adds increased by 131% in Q2, 2017, but between 2015 and 2016, malvertising phishing attacks increased by a staggering 1,978%.
The websites that these adverts direct users to often promise a free gift in exchange for taking part in a survey. Genuine market research firms tend not to offer large incentives for taking part in surveys, or when they do offer an incentive, participants are entered into a draw where they stand a chance of winning a prize. When gifts are offered, to all participants it is a warning sign that all may not be as it seems. That said, many people still fall for the scams.
The aim of the surveys is to obtain sensitive information such as bank account information, Social Security numbers, usernames, passwords and personal information. The information can be used for a wide range of nefarious purposes. It is not only personal information that is sought. Cybercriminals are keen to gain access to corporate email accounts for the data they contain and to use them to send phishing emails.
When phishing attacks occur through corporate email accounts it can seriously tarnish a company’s reputation and may result in litigation if insufficient controls have been implemented to prevent such attacks from occurring.
Businesses can protect against malicious adverts and websites by implementing a web filter. A web filter can be configured to block third party adverts as well as the malicious websites that users are directed to, thus minimizing the risk of web-based malware and phishing attacks.
Many businesses are now choosing to filter the website content that their employees access purely for security reasons, although there are many other benefits to be gained from content filtering. Web filters can help employers curb cyberslacking, control bandwidth usage, and reduce legal liability.
With the cost of DNS-based content filtering low and potentially high losses from the failure to control Internet access, it is no surprise that so many businesses are now choosing to regulate what employees can do online at work.
To find out more about the full range of benefits of web filtering and to take advantage of a free trial of WebTitan, the leading web filtering solution for businesses, contact the TitanHQ today.