Web skimming

Web skimming is a form of internet or carding fraud whereby a payment page on a website is compromised when malware is injected onto the page via compromising a third-party script service in order to steal payment information.

A report in 2016 suggested as many as 6,000 e-commerce sites may have been compromised via this class of attack.[1] In 2018, British Airways had 380,000 card details stolen in via this class of attack.[2] A similar attack affected Ticketmaster the same year with 40,000 customers affected[3] by maliciously injected code on payment pages.

Magecart

Magecart is software used by a range[4] of hacking groups for injecting malicious code into ecommerce sites to steal payment details.[5] As well as targeted attacks such as on Newegg,[6] it's been used in combination with commodity Magento extension attacks.[7] The 'Shopper Approved' ecommerce toolkit utilised on hundreds of ecommerce sites was also compromised by Magecart[8] as was the conspiracy site InfoWars.[9]

Defence

Normal security practices are recommended such as vendor assessment, server patching, access control and external penetration testing. In addition, use of content security policy and subresource integrity configurations can prevent malicious script modifications.[5] In addition to the best practices highlighted above, there are also vendors that provide mitigation against Magecart and web skimming attacks.

gollark: /pay product@name.kst amount
gollark: https://i.redd.it/rwai0vegcde21.png
gollark: You can\* run your own Krist node!\* you can but it'll break horribly and there is no way to make it work without editing much of the code
gollark: Or the SSH keys, I mean.
gollark: Can I have the passwords for switchcraft?

References
  1. Ismail, Nick (13 October 2016). "Stowaways: malicious skimming code hiding in almost 6,000 online shops". Retrieved 9 December 2018.
  2. Whittaker, Zack (11 September 2018). "British Airways breach caused by credit card skimming malware, researchers say". Retrieved 9 December 2018.
  3. Priday, Richard (28 June 2018). "The Ticketmaster hack is a perfect storm of bad IT and bad comms". Retrieved 9 December 2018.
  4. Whittaker, Zack (13 November 2018). "Meet the Magecart hackers, a persistent credit card skimmer group of groups you've never heard of". Retrieved 9 December 2018.
  5. Muncaster, Phil (1 October 2018). "Magecart: Time to Focus on Web Security to Mitigate Digital Skimming Risk". Retrieved 9 December 2018.
  6. Osborne, Charlie (19 September 2018). "Magecart claims another victim in Newegg merchant data theft". Retrieved 9 December 2018.
  7. Cimpanu, Catalin (23 October 2018). "Magecart group leverages zero-days in 20 Magento extensions". Retrieved 9 December 2018.
  8. Leyden, John (9 October 2018). "Payment-card-skimming Magecart strikes again: Zero out of five for infecting e-retail sites". Retrieved 9 December 2018.
  9. Blake, Andrew (14 November 2018). "Alex Jones' Infowars store infected with malware capable of skimming payment data". Retrieved 9 December 2018.
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