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    Rewterz Threat Alert – Over 185,000 Payment Card Details Stolen by MageCart

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    March 17, 2023
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    Rewterz Threat Alert – Chaos Ransomware – Active IOCs
    Severity High Analysis Summary Chaos is a customizable ransomware builder that emerged on June 9 2021 (in underground forums) by falsely marketing itself as the .NET […]
    March 17, 2023
    March 17, 2023
    Rewterz Threat Advisory – Multiple Adobe ColdFusion Vulnerabilities
    Severity High Analysis Summary CVE-2023-26361 CVSS:4.9 Adobe ColdFusion could allow a remote authenticated attacker to traverse directories on the system. An attacker could send a specially […]
    March 17, 2023
    March 17, 2023
    Rewterz Threat Alert – Ursnif Banking Trojan aka Gozi – Active IOCs
    Severity Medium Analysis Summary Ursnif banking trojan also known as Gozi and Dreambot has been around for more than 10 years. It gained popularity in 2015 […]

    Threat Insights

    16
    pdf-file (1)
    Annual Threat Intelligence Report 2022
    • Threat Advisories
    • Monthly Threat Insights
    • Threat Intelligence Reports
  • Why Rewterz?

    About Us

    Before Rewterz got its start, the market was in dire need of a specialized and dedicated information security company. It was nearly impossible for businesses to find a trustworthy provider that could truly cover all of their bases. We wanted to meet this need, giving companies across the globe a chance to get ahead while knowing that their data is in good hands.

    Read More

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    Our leadership team brings together years of knowledge and experience in cybersecurity to drive our company's mission and vision. Our team is passionate about delivering high-quality products and services, leading by example and assisting our clients in securing their organization’s environment.
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    At Rewterz, we believe that businesses have a responsibility to impact positively and contribute to the well-being of our communities as well as the planet. That's why we are committed to operating in a socially responsible and sustainable way.

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Rewterz Threat Alert – Over 185,000 Payment Card Details Stolen by MageCart

June 10, 2019

Severity

Medium

Analysis Summary

A credit card skimming campaign recently observed that steals payment card details from compromised websites.

MageCart is the name given to numerous cybercriminal groups that embed digital skimmers on compromised e-commerce sites. The group made global headlines for a series of high-profile breaches on Ticketmaster, British Airways, and Newegg. These groups are still active and continue to target online stores to steal payment card details from unaware customers.

MageCart Skimmer

The malicious javascript code, also called CoffeMokko JS-sniffer, has been around since May 2017. While the skimmer has been modified several times, we will be focusing our analysis on the latest sample. The skimmer is loaded by a direct link in the compromised website’s HTML code and has the following URL format:

                                                                         <C&C >/src/<compromised website>.js
                                                                        <C&C>/js/<compromised website>.js
                                                                        <C&C>/assets/<compromised website>.js

image_102708167.img.png

Taking a look at the skimmer javascript, some strings are obfuscated to avoid crawlers and signatures detecting their malicious code. Upon deobfuscation, an array is created with interesting strings, such as the C&C (foodandcot[.]com) and other strings to identify the payment form on the targeted website.

image_1327433563.img.png

To check that the current page is the payment page, it searches for the keywords onepage, checkout, onestep, and firecheckout in the URL address. Once it is on the correct page, it intercepts the following details after an unaware customer fills in the fields:

image_1315692190.img.png

Without knowing the replaced characters, it would be difficult to decode back the original information.

The encoded stolen information is sent via a POST request to /tr/index.php, which is the same C&C where the malicious javascript is being hosted.

image.img.png

Inspecting the C&C with the IP address 178.33.231[.]184 revealed other domains it is hosting. As expected, these domain names attempts to imitate legitimate e-commerce websites related to different services and products (e.g. food, fitness, espresso, etc.). This makes it more difficult to spot something suspicious during static analysis.

image_511962868.img.png

Impact

Exposure of sensitive information

Indicators of Compromise

IP(s) / Hostname(s)

178[.]33[.]231[.]184

URLs

  • foodandcot[.]com
  • freshdepor[.]com
  • https[:]//foodandcot[.]com/src/yolenis[.]js
  • https[:]//freshdepor[.]com/src/yorkarmoury[.]js
  • https[:]//swappastore[.]com/src/ispeeches[.]js
  • https[:]//swappastore[.]com/src/turtlecase[.]js
  • swappastore[.]com
  • verywellfitnesse[.]com

Malware Hash (MD5/SHA1/SH256)

  • 9b31482f35209ea49bd2daed2fdb16d7196fa54034b6e72576050ca7799ed352

Remediation

Block threat indicators at your respective controls.

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