Technological advancements have ushered us into an era where digital transactions are becoming the new standard. People are encouraged to adopt digital payment methods with the promise of better security, more convenience, and even perks.
However, cyberthreats rarely discriminate and target just about everything that seeps into the online environment. Nowadays, several types of attacks could compromise sensitive information, including credentials, addresses, names and financial information. One of the most vicious attacks is formjacking.
It belongs to a broader category of cyberthreats called “supply chain attacks,” where threat actors target organizations by attacking vulnerable providers within their supply chains.
Although attackers can use formjacking to steal any type of sensitive user information, the attack is mainly used with payment forms to siphon credit card information without arousing suspicion. In this case, the vulnerable provider is usually a third-party payment processor.
Injecting malicious code into webpage forms requires identifying a vulnerability in the web application. The flaw can typically be found in:
After identifying the weak spot, attackers inject the subversive script into the web app and obfuscate it to avoid detection by signature scanners.
Once installed, the script collects user data sent to the website through the compromised form. Users must fill out the form and submit the information to the server for the attack to succeed. Formjacking doesn’t act as a keylogger; instead of collecting keyboard input, it collects data from submitted web forms and exfiltrates it to the attacker’s server.
After stealing sensitive data or payment information from their victims, threat actors could either use them for their personal gain or sell it on dark web marketplaces. Cybercriminals can use the data for credit card fraud or identity theft.
Due to its clandestine nature, detecting formjacking can be challenging. Unlike other cyberattacks, formjacking has no telltale signs, especially for the layman.
Once the victim submits the sensitive information through the compromised form, the request goes through as normal, making it difficult for both the website and the user to detect the attack.
Identifying malicious code on a compromised webpage can be a meticulous task. However, automated detection tools that scan web apps for suspicious activities might help simplify the process.
As a customer, you are most vulnerable to formjacking attacks, particularly because you can’t possibly know whether a form is compromised or not. This makes formjacking almost impossible to ward off. However, you could take these steps if you suspect you’ve fallen victim to formjacking:
Dedicated software solutions such as Bitdefender Ultimate Security can help keep you safe against cyberthreats, credit card fraud, and identity theft, with features like:
Vlad's love for technology and writing created rich soil for his interest in cybersecurity to sprout into a full-on passion. Before becoming a Security Analyst, he covered tech and security topics.View all posts
May 16, 2023
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