When it comes to cyber threats, judging the threat by its name can be an imaginary endeavour. As the term "malvertising", a portmanteau of the term "malicious advertising", is always presented with the implication that it overlaps with ads, even dodgy ones, and, therefore, the fallacy that its impact rarely extends past the level of frustration might be reinforced.
In consequence, those who do not have a lot of experience might get the impression that there is no big deal, but in actuality, there is no doubt that this is something to be cautious about.
Because every brand's success depends on maintaining a strong online presence in this day and age, advertisers must learn how to usurp social media and search engines to reach a wider audience. Almost every minute of every day, LED ads are bombarding smartphone screens throughout the world with sponsorships that are part of the modern advertising landscape.
There is, however, an element of deception within these ads that appears to make them seem very innocent. Malvertising, which is the act of spreading malware through digital ads on reputable websites, has become a rising trend because criminals target reputable websites with nefarious intentions. Several websites, both big and small, have started to use these ads to steal sensitive information from users by misleading them through deceptive websites and directing them to malicious content disguised as harmless content to steal information about them.
In today's era where it is imperative for advertising to maintain a strong digital presence to achieve success, advertisers are now adept at harnessing social media and search engines to reach as many consumers as possible. Advertisements on digital media dominate the modern marketing landscape, and sponsored ads can be seen all over the smartphone screen every second of the day on any device.
Even though these ads appear to be sheepskins, they are wolves.
There has been a growing trend in recent years of malvertising in which cyber criminals spread malware via various types of digital advertisements on reputable websites as a part of their malicious marketing operations. Using the illusion that a user trusts a familiar brand, these ads hide sensitive information by leading them to deceptive websites and leading them to download malware hidden in harmless-looking content.
Such ads are designed to ruin users' experience and steal users' information.
The term malvertising is formed from the combination of malicious and advertising, as it relates to the act of using ads to disseminate malware through online advertisements. A sophisticated cyber threat, phishing refers to the strategy of exploiting the trust that users have placed in online advertising to gain access to their systems and networks.
Oftentimes, malicious advertising campaigns are delivered through legitimate ad networks, which makes it particularly tough for marketing companies to detect and mitigate attacks.
It can be argued that malvertising at its core involves injecting malicious code or links into online advertisements, which, in the case of advertising, can result in users downloading malware onto their devices or being redirected to malicious websites unintentionally.
This program can be classified into several categories such as adware, spyware, ransomware, and banking trojans, all of which are hazardous forms of malware.
By the time a website visitor clicks on the ad, the corrupted code will install adware, malware, or other malicious software onto their computer as soon as they click the ad. Moreover, the attacker could also spoof or leverage social engineering techniques to advance the attack through redirection of the user to a malicious website.
There is also a possibility that malicious advertising attacks may execute an exploit kit, which is a form of malware that is designed to scan the system for vulnerabilities and exploit those weaknesses to compromise the system.
As soon as a malware program is downloaded via a malvertising attack, it operates identical to a normal malware program, once installed. This type of software can damage files, redirect internet traffic, track the user's activity, steal sensitive data, or create backdoors that allow users to access the computer through other systems.
There are also other ways in which malware can be used, including deleting, blocking, modifying, leaking, or copying data, so that it can either be sold back to the user for ransom or on the dark web for profit.
In the past, threat actors have exploited legitimate advertising networks to dish out their malicious content via banner ads, pop-up windows, or embedded scripts that were placed on trusted web pages by malware actors.
Frequently, these ads are targeted at specific demographics or interests to increase the chances that they will be clicked by users.
The user, if caught on the hook, will initially be redirected to a landing page or prompted to download an ostensibly harmless file to continue with the process. As a result, a very sketchy piece of code is executed that installs viruses, ransomware, spyware, or adware without their knowledge.
There are a variety of ways in which cybercriminals can exploit a compromised device to carry out fraud, steal personal information, distribute malware, recruit it into a botnet, or encrypt data and hold it for ransom. Fast-flux logic is used to modify the IP address of the malicious Command and Control (C2) infrastructure to prevent the attacker from tracing the attacker back to the organization that perpetrated the attack.
Types of Marketing
There are several different types of malvertising and not all of them function in the same way. The following are the main types of hacking tactics that are employed by hackers:
The presence of drive-by downloads, which only require the user to load the webpage, triggers a malware download without them having to click on anything to complete the process.
It is possible to get tricked into installing a fake software update, such as a security patch, or an update for Flash Player, based on the appearance of a critical update, which is malware, when in fact it is only an ad.
A phishing ad is an advertising campaign that pretends to be coming from a trustworthy company or service to steal sensitive information such as a password or credit card number from users' computers.
It's called cryptojacking, and it involves the use of malicious ads to steal users' devices' processing power to mine cryptocurrencies in the background without their knowledge, resulting in slow and unresponsive systems.
Redirects to malicious domains. In some instances, users are automatically taken to sites that attempt to gather data about users by directing them to suspicious domains or phishing sites.
By exploiting Zero-Day Vulnerabilities, hackers are capable of installing malware on users' computers through browsers or operating systems, which allows them to bypass browser security patches and install malware on their computers.
Several malvertising campaigns tend to distribute ransomware which provides users with the possibility of locking their devices and demanding payment to unlock them.
Such methods have been effective in spreading some of the most notorious strains of malware, such as TeslaCrypt and CryptoWall.
Malvertisements, or malicious advertisements, possess several distinct characteristics that make them identifiable when individuals are aware of the warning signs. Common indicators include advertisements that appear sloppy or unprofessional, those containing spelling errors, and ads making unrealistic promises, such as miraculous cures or sensational claims.
Furthermore, advertisements focused on celebrity scandals or offering deals that seem too good to be true should raise suspicion. Another red flag is when ads do not align with a user’s recent search activity or online behaviour.
While malvertising often goes unnoticed compared to more overt cyber threats like ransomware or information-stealing campaigns, this perception is misleading. In reality, these cyberattacks often overlap.
Malicious advertisements not only present themselves as nuisances but also serve as potential launchpads for more severe and damaging compromises. This threat is amplified by social engineering tactics, hacking techniques, and the abuse of legitimate online services, which collectively make this form of cybercrime highly effective.
The good news is that malvertising scams are relatively easy to avoid with proper caution and awareness.
Individuals are advised to exercise reasonable scepticism toward advertisements that make unrealistic promises, contain typographical errors, or seem unrelated to their recent online activity. In addition, users should verify the URLs of landing pages after clicking on advertisements to ensure their legitimacy.
Disabling autoplay for video content in browsers is another useful precautionary measure. Installing an ad-blocking extension and maintaining up-to-date antivirus software can also significantly reduce exposure to malvertising, as these tools are highly effective at intercepting and preventing malicious ads from causing harm.
Despite the availability of preventative measures, malvertising is an evolving threat. As cybersecurity defences become more advanced, so too do the tactics employed by cybercriminals. However, the introduction of AI-powered security tools offers new hope in the fight against malvertising. Companies such as Confiant and GeoEdge are leveraging machine learning algorithms to detect and block malicious advertisements before they can reach users, enhancing online safety.
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