CAPTCHA | Breaking Cybersecurity News | The Hacker News

Cybersecurity researchers have shed light on a previously undocumented aspect associated with ClickFix-style attacks that hinge on taking advantage of a single ad network service as part of a malvertising-driven information stealer campaign dubbed DeceptionAds . "Entirely reliant on a single ad network for propagation, this campaign showcases the core mechanisms of malvertising — delivering over 1 million daily 'ad impressions' [in the last ten days] and causing thousands of daily victims to lose their accounts and money through a network of 3,000+ content sites funneling traffic," Nati Tal, head of Guardio Labs, said in a report shared with The Hacker News. The campaigns, as documented by several cybersecurity companies in recent months, involve directing visitors of pirated movie sites and others to bogus CAPTCHA verification pages that instruct them to copy and execute a Base64-encoded PowerShell command, ultimately leading to the deployment of information st...

Phishing attacks are steadily becoming more sophisticated, with cybercriminals investing in new ways of deceiving victims into revealing sensitive information or installing malicious software. One of the latest trends in phishing is the use of QR codes, CAPTCHAs, and steganography. See how they are carried out and learn to detect them. Quishing Quishing, a phishing technique resulting from the combination of "QR" and "phishing," has become a popular weapon for cybercriminals in 2023. By concealing malicious links within QR codes, attackers can evade traditional spam filters, which are primarily geared towards identifying text-based phishing attempts. The inability of many security tools to decipher the content of QR codes further makes this method a go-to choice for cybercriminals. An email containing a QR code with a malicious link Analyzing a QR code with an embedded malicious link in a safe environment is easy with  ANY.RUN : Simply open  this task  in th...

Cybersecurity researchers are warning about CAPTCHA-breaking services that are being offered for sale to bypass systems designed to distinguish legitimate users from bot traffic. "Because cybercriminals are keen on breaking CAPTCHAs accurately, several services that are primarily geared toward this market demand have been created," Trend Micro  said  in a report published last week. "These CAPTCHA-solving services don't use [optical character recognition] techniques or advanced machine learning methods; instead, they break CAPTCHAs by farming out CAPTCHA-breaking tasks to actual human solvers." CAPTCHA  – short for Completely Automated Public Turing test to tell Computers and Humans Apart – is a tool for differentiating real human users from automated users with the goal of combating spam and restricting fake account creation. While CAPTCHA mechanisms can be a  disruptive user experience , they are seen as an effective means to counter attacks from bot-ori...

A three-year-old attack technique to bypass Google's audio reCAPTCHA by using its own Speech-to-Text API has been found to still work with 97% accuracy. Researcher Nikolai Tschacher disclosed his findings in a proof-of-concept (PoC) of the attack on January 2. "The idea of the attack is very simple: You grab the MP3 file of the audio reCAPTCHA and you submit it to Google's own speech-to-text API," Tschacher  said  in a write-up. "Google will return the correct answer in over 97% of all cases." Introduced in 2000, CAPTCHAs (or Completely Automated Public Turing test to tell Computers and Humans Apart) are a type of challenge-response tests designed to protect against automated account creation and service abuse by presenting users with a question that is easy for humans to solve but difficult for computers. reCAPTCHA  is a popular version of the CAPTCHA technology that was acquired by Google in 2009. The search giant released the  third iteration  of re...