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posted by Fnord666 on Monday June 29 2020, @05:19PM   Printer-friendly
from the watch-what-you-look-at dept.

Credit card skimmers are now being buried in image file metadata on e-commerce websites:

The attack is a variation that uses favicons, but with a twist. Malicious code was tracked back to a malicious domain, cddn[.]site, that is loaded via a favicon file. While the code itself did not appear malicious at first glance, a field called "Copyright" in the metadata field loaded the card skimmer using an[sid] header tag, specifically via an HTML onerror event, which triggers if an error occurs when loading an external resource.

When loaded onto a compromised website, the JavaScript grabs input from fields used to submit payment information, including names, billing addresses, and card details.

The Magecart group obfuscated the code within the EXIF[*] data, and unusually, will not simply send stolen data via text to a command-and-control server (C2). Instead, data collected is also sent as image files via POST requests.

"The threat actors probably decided to stick with the image theme to also conceal the exfiltrated data via the favicon.ico file," the researchers say.

It is thought that Magecart Group 9 is to blame, due to links made by security researcher @AffableKraut to domains and registrars also hosting scripts using the EXIF technique.

[*] EXIF: Exchangeable image file format.


Original Submission

 
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  • (Score: 2) by DannyB on Monday June 29 2020, @06:30PM (3 children)

    by DannyB (5839) Subscriber Badge on Monday June 29 2020, @06:30PM (#1014198) Journal

    > loaded the card skimmer using an[sid][sic] header tag

    That's sick.

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  • (Score: -1, Offtopic) by Anonymous Coward on Monday June 29 2020, @07:00PM (2 children)

    by Anonymous Coward on Monday June 29 2020, @07:00PM (#1014216)

    Kelloggs Corn Flakes, big, yeah, yeah, yeah, they're not small, no, no, no!

    That was Honeycomb.

    • (Score: 0, Offtopic) by Anonymous Coward on Monday June 29 2020, @09:19PM

      by Anonymous Coward on Monday June 29 2020, @09:19PM (#1014256)

      Honeycomb's big? Yeah yeah yeah.
      It's not small? No, no, no.
      Honeycomb's got a big big bite!
      Big big taste in a big big bite!

    • (Score: 2) by DannyB on Tuesday June 30 2020, @05:19PM

      by DannyB (5839) Subscriber Badge on Tuesday June 30 2020, @05:19PM (#1014584) Journal

      No, um, they're Guuuuuuureat!

      --
      People today are educated enough to repeat what they are taught but not to question what they are taught.