Overview With the widespread application of LLM technology, data leakage incidents caused by prompt word injections are increasing. Many emerging attack methods, such as inducing AI models to execute malicious instructions through prompt words, and even rendering sensitive information into pictures to evade traditional detection, are posing serious challenges to data security. At the same […] The post Prompt Injection: An Analysis of Recent LLM Security Incidents appeared first on NSFOCUS, ...| NSFOCUS, Inc., a global network and cyber security leader, protects enterpris...
THE “PERFECT” MAGECART ATTACK: FAKE STRIPE FORM WITH ZERO EXTERNAL FOOTPRINT August 26, 2025 The Source Defense Research Team has observed a rare and highly sophisticated Magecart attack that leaves almost no external trace. A hacker gained access to the merchant’s server and injected a first-party inline JavaScript designed to seamlessly replace the legitimate Stripe The post The “perfect” Magecart attack: fake stripe form with zero external footprint appeared first on Source Defense.| Source Defense
WHEN A PNG ISN’T A PNG; NEW MAGECART SKIMMER DISCOVERED August 5, 2025 The Source Defense Research Team has uncovered a new Magecart campaign. Instead of using a traditional script, the attackers deliver malicious code disguised as a PNG image file. While appearing harmless, the file actually contains base64‑encoded JavaScript that silently harvests payment card The post When a PNG Isn’t a PNG: New Magecart Skimmer Discovered appeared first on Source Defense.| Source Defense
Magecart Repurposes Legitimate Brazilian Sites for C2 July 22, 2025 MAGECART REPURPOSES LEGITIMATE BRAZILIAN SITES FOR C2 The Source Defense Research Team has uncovered a covert Magecart campaign targeting Brazilian e-commerce sites. This attack demonstrates how legitimate websites can be hijacked to serve as Command and Control (C2) servers, becoming unwitting hubs for digital skimming The post Magecart Repurposes Legitimate Brazilian Sites for C2 appeared first on Source Defense.| Source Defense
When Your Trusted Vendor Becomes the Threat July 15, 2025 A major Magecart attack is silently unfolding across the UK’s fast-food sector—and the root cause is a trusted vendor. The Source Defense Research Team has uncovered a widespread skimming campaign affecting over 65 fast-food websites developed by a popular online food ordering platform, a UK-based The post When Your Trusted Vendor Becomes the Threat appeared first on Source Defense.| Source Defense
NEW MAGECART ATTACK: SILENT SKIMMING AND WEBSOCKETS July 8, 2025 A newly discovered Magecart campaign is raising the bar on stealth—executing a silent skimming attack that evades conventional detection mechanisms by abusing first-party code and WebSocket channels. Attack details A trusted first-party script establishes a WebSocket connection to clicktrack01[.]com, which delivers the Magecart JavaScript payload. The post New Magecart Attack: Silent Skimming and WebSockets appeared first on...| Source Defense
ONGOING MAGECART VARIANT HIDES MALICIOUS CODE IN BROKEN IMAGE TAGS July 1, 2025 Our research team at Source Defense has uncovered a stealthy Magecart-style attack targeting dozens of e-commerce websites worldwide across various industries. This novel technique hides malicious JavaScript inside a Base64-encoded payload embedded in an image tag — making detection and mitigation significantly The post Ongoing Magecart variant hides malicious code in broken image tags appeared first on Source D...| Source Defense
RELYING ON EXTERNAL PAYMENT PROVIDERS IS NOT ENOUGH; HUNDREDS OF SUCH SITES ARE UNDER ATTACK June 24, 2025 Many eCommerces assume they’re safe since they don’t collect payment data; instead users are redirected to trusted providers like Stripe, PayPal and others. An active CosmicSting Magecart variant proves that belief dangerously false. The Source Defense Research Team The post Relying on external payment providers is not enough; hundreds of such sites are under attack appeared fir...| Source Defense
RARE AND DANGEROUS MAGECART ATTACK: GTM CODE ITSELF COMPROMISED June 17, 2025 The Source Defense Research Team has uncovered a rare and deeply alarming development in Magecart-style attacks — one that redefines how threat actors are abusing trusted web infrastructure. In contrast to previously documented GTM-based attacks, where Google Tag Manager (GTM) was used to load malicious JavaScript hosted The post Rare and dangerous Magecart attack: GTM code itself compromised appeared first on...| Source Defense
DOUBLE-ENCODED MAGECART ATTACK HIDES BEHIND LEGITIMATE DOMAIN, IMPACTS OVER 1K WEBSITES June 10, 2025 First-party script encodes stolen payment data twice, routes it through a trusted Czech eCommerce site The Source Defense Research Team has uncovered a sophisticated Magecart campaign that has compromised over 1,000 eCommerce websites worldwide. This attack is notable for its use of The post Double-encoded Magecart attack hides behind legitimate domain appeared first on Source Defense.| Source Defense
MAGECART RETURNS: THREAT ACTORS REBRAND GTM-HIDING ATTACKS June 3, 2025 The Source Defense Research Team has observed an infrastructure shift in a persistent Magecart campaign. The attackers have reactivated a previously dormant domain—jqueri[.]at—continuing their established strategy of hiding malicious scripts behind Google Tag Manager (GTM) containers. This move is part of an ongoing effort to stay ahead The post Magecart returns: threat actors rebrand GTM-hiding attacks appeared fir...| Source Defense
SOPHISTICATED WEBSOCKET ATTACK LEVERAGING BROKEN IMAGES AND SELF-REMOVING JAVASCRIPT May 27, 2025 The Source Defense Research team has uncovered a highly sophisticated client-side attack employing advanced evasion techniques. This latest campaign leverages broken <img> elements — specifically using their onerror event — to automatically execute obfuscated JavaScript when an image fails to load. Because the The post Sophisticated WebSocket attack leveraging broken images and self-removing ...| Source Defense
ATTACKERS STRIKE UNPROTECTED SITES – BECAUSE CLEANUP ALONE IS NOT ENOUGH May 20, 2025 The Source Defense Research team has identified a troubling pattern: attackers are returning to previously compromised sites—this time leveraging a brand-new domain, css.telechargent[.]com, that was still clean on VirusTotal and other blacklists at the time of detection. Because this domain had no The post Attackers strike unprotected sites – because cleanup alone is not enough appeared first on Sourc...| Source Defense
ATTACKERS MASK VARYING MALICIOUS SCRIPTS BEHIND ROTATING TRUSTED DOMAINS May 13, 2025 A newly observed global campaign is exploiting the trust users and security tools place in legitimate websites. In this silent skimming attack, malicious scripts are loaded from previously trusted domains—specifically compromised e-commerce sites—and steal PCI and PII data without raising immediate suspicion. Source Defense research has The post Attackers mask varying malicious scripts behind rotating...| Source Defense
NEXT LEVEL ATTACK: SEVERAL GTMS WORKING IN SYNC, CSS AND DOM EXPLOITED May 6, 2025 A sophisticated attack leveraging coordinated Google Tag Managers, CSS obfuscation, and DOM-based execution to deploy counterfeit payment forms and exfiltrate data via WebSocket The Source Defense Research Intelligence team has uncovered a sophisticated cyberattack targeting e-commerce websites globally. While prior The post Next level attack: Several GTMs working in sync, CSS and DOM exploited appeared first o...| Source Defense
DOUBLE-ENTRY ATTACK WITH CONVINCING FAKE FORMS TRIGGERED FROM NON-SENSITIVE WEBPAGES April 29, 2025 Recent attack exploits unprotected, non-sensitive webpages to deploy customized fake payment form per site Attackers are continuously evolving their methods to steal credit card data without detection. In this case, we’ve identified a custom-made attack that deploys a fake payment form tailored The post Double-entry attack with convincing fake forms triggered from non-sensitive webpages appea...| Source Defense
MULTIPLE WEBSITES BREACHED THROUGH COMPROMISED HOSTING SERVICE April 22, 2025 A new attack has been disclosed, hidden within a known and trusted source—effectively bypassing solutions that rely on Content Security Policy (CSP), where such sources are typically whitelisted. The Source Defense Research Team has uncovered another sophisticated breach affecting numerous websites, including UK-based restaurant websites The post Multiple websites breached throuh compromised hosting service app...| Source Defense
LOCALIZED DOUBLE-ENTRY ATTACK AFFECTS HUNDREDS OF WEBSITES VIA DOZENS OF MALICIOUS DOMAINS April 15, 2025 LOCALIZED DOUBLE-ENTRY ATTACK AFFECTS HUNDREDS OF WEBSITES VIA DOZENS OF MALICIOUS DOMAINS Client-side attacks usually rely on a few malicious domains, but this one targets about ten times more sites using a double-entry method tailored to each site. The The post Localized double-entry attack affects 100’s of websites via dozens of malicious domains appeared first on Source Defense.| Source Defense
TRENDING: ATTACKS VIA NESTED GTM SCRIPTS April 8, 2025 While the compromise of individual Google Tag Manager (GTM) containers is a known tactic, the emergence of multi-level GTM container chains makes these attacks even more difficult to detect. Over the past six months—including as recently as last week—Source Defense has identified a new and concerning The post Trending: Attacks via nested GTM scripts appeared first on Source Defense.| Source Defense
APRIL FOOLS PRANK? ATTACKER HIDES BEHIND “HARMLESS” THANK YOU PAGE & COOKIES April 1, 2025 The Source Defense research team has uncovered a novel attack technique that cleverly disguises malicious activity. In this method, attackers compromise a first-party script to stealthily copy payment details into commonly used cookies—a process typically regarded as trustworthy especially when The post Attacker hides behind “harmless” thank you page & cookies appeared first on Source Defense.| Source Defense
THIRD PARTY SERVICE IDOSTREAM[.]COM COMPRIMISED; ATTACK VIA SOCIAL ENGINEERING March 25, 2025 As recently reported in the media, over a hundred auto dealerships worldwide were compromised by this malicious script, which generated a ClickFix webpage leading to the installation of SectopRAT malware. ClickFix is a social engineering tactic where cybercriminals deceive users into copying and The post 3rd party service IDOSTREAM[.]COM comprimised appeared first on Source Defense.| Source Defense
LIVE ATTACK HIDING BEHIND GOOGLE APPS March 18, 2025 Content Security Policy (CSP) and similar solutions allow scripts from “trusted” sources to run freely; but what happens when these sources are compromised? The Source Defense Research Team discovered yet another sophisticated attack that has been active for about a year; this time exploiting Google’s trusted The post Live attack hiding behind Google apps appeared first on Source Defense.| Source Defense
MAGECART AS A NATIONAL SECURITY ISSUE March 11, 2025 Magecart targets NYC Police Department and Federal Bureau of Prisons employees via merchants selling uniforms Governments invest heavily in security, but what happens when hackers exploit the private industry that serves government agencies? The Source Defense Research Team discovered an alarming attack—not only stealing credit card The post Magecart as a national security issue appeared first on Source Defense.| Source Defense
The Oregon Zoo's recent data breach serves as a stark reminder of the urgent need for robust cybersecurity measures in today's digital landscape. With over 117,000 payment card details potentially compromised, this incident underscores the vulnerabilities that organizations face when it comes to eSkimming (client-side) attacks and PCI DSS compliance. The post Oregon Zoo Data Breach Exposes Payment Card Information appeared first on Source Defense.| Source Defense
An authorized IRS eFile website is the latest victim of a JavaScript attack. eFile.com has become the victim of an attack which originated in a previously innocent JavaScript file. The javascript file, popper.js, was modified to include obfuscated code which redirected the browser to a legitimate looking error page. The post JavaScript: A Taxing Situation appeared first on Source Defense.| Source Defense
BidenCash, which purposely leverages the namesake of U.S. President Joe Biden, has been operating for the past year and has become one of the top carding marketplaces on the dark web. But what makes this latest dump of stolen data significant is the completeness of the dataset. The post Fullz and Cybercrime: Why the BidenCash Data Dump Matters appeared first on Source Defense.| Source Defense
The Liquor Control Board of Ontario (LCBO), Canada’s largest alcoholic beverage retailer, revealed last week that hackers had injected malicious code into its website to steal customer and credit card data. This represents another in a growing line of disclosures related to Digital Skimming attacks. The post Canada’s Largest Alcohol Retailer Hit by Magecart Attack appeared first on Source Defense.| Source Defense
Think DSPM is enough to secure your sensitive data? Think again. Visibility alone won’t stop breaches. It’s time to go beyond passive scanning.| Polymer
If you've ever built a machine learning model in Python, you know how quickly things can get messy.| SAS Users
Beware of digital skimming attacks! According to Visa's Spring 2023 Biannual Threats Report, digital skimming attacks targeting customer data on eCommerce checkout pages increased by 174% in the last half of 2022.| Source Defense