Malwarebytes reported on December 17, 2024, that Leakd.com found a publicly accessible Amazon S3 bucket containing screenshots with what the report described as 5 million US payment-card details and personal details. The number has not been independently verified here, and the report did not identify the party responsible for the exposed bucket. If you think your information may be involved, contact your card issuer promptly and monitor your account for suspicious activity.
What was exposed, according to the report?
Malwarebytes researcher Pieter Arntz wrote that Leakd.com’s security team found a freely accessible S3 bucket containing 5 terabytes of screenshots. Malwarebytes described the exposed information as 5 million US credit-card details and personal details; its article later refers to credit and debit card information. This is the report’s description, not an independently confirmed count of unique cards.
The screenshots reportedly showed people entering personal and financial details into websites promoting free iPhones or heavily discounted holiday gifts. Leakd.com said: “The leaked screenshots often featured instances of users entering personal and financial details into seemingly innocent promotional forms.” The report did not describe this as a confirmed breach of a named bank or retailer.
How did the screenshots get there?
The data owner was unknown. Arntz said the screenshots could have come from information-stealing malware that captures and organizes screen images, or from phishing websites made to collect information. Based on the screenshots’ contents, he considered phishing the more likely explanation; that was an assessment, not a confirmed cause.
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After Leakd.com supplied information, AWS Abuse initiated an investigation. The Malwarebytes article did not report a later outcome.
What should you do if your card details may be involved?
- Contact your card issuer. Use the number on your card or the issuer’s official app or website. Ask it to review suspicious activity and follow its instructions about blocking transactions, replacing the card, or securing the account.
- Review recent transactions. Check card and bank statements regularly, including small or unfamiliar charges. Report anything you do not recognize to the issuer promptly.
- Turn on issuer alerts. If available, enable transaction or fraud alerts so you can be notified about account activity. Alert options vary by issuer.
- Secure related online accounts. Change a password if you reused it on a potentially affected site, and enable multi-factor authentication where available.
- Consider a credit freeze if personal details may enable new-account fraud. A freeze can help deter someone from opening new credit in your name. It does not stop charges on an existing card; ask the card issuer to handle card-account concerns.
These steps do not replace issuer-specific guidance. The Malwarebytes report advised checking statements, contacting the bank about suspicious activity, setting up issuer fraud alerts where available, changing passwords, enabling multi-factor authentication, and freezing credit to deter new accounts.
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How can you reduce the chance of entering details on a phishing page?
- Be cautious with unsolicited emails and texts that urge you to claim a prize, free phone, or unusually steep holiday discount.
- Do not submit payment or personal details just because a promotion looks familiar. Navigate to the retailer’s official website independently and verify the offer there.
- Pause when a deal seems too good to be true, particularly if the message creates urgency or asks for sensitive information to claim a giveaway.
Malwarebytes also promoted its Browser Guard in the incident article. That recommendation is the publisher’s own; the article did not provide independent testing or compare browser-protection products.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Source and scope
The incident details and response recommendations above are from Pieter Arntz’s Malwarebytes report, published December 17, 2024: “5 million payment card details stolen in painful reminder to monitor Christmas spending”. The reported scale and explanation should be understood as claims and assessment in that account, not as independently established findings.
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