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A new sophisticated point-of-sale or memory-scraping malware called "Multigrain" was discovered on April 17, 2016 by the FireEye Inc. security company. Multigrain malware comes under the family of NewposThings Malware. This malware is similar to the NewposThings, FrameworkPOS and BernhardPOS malware which were known previously as notorious malware.

Process of Multigrain malware

Multigrain uses the Luhn algorithm to validate the credit and debit card details. This POS malware then infects the computer and blocks Hypertext Transfer Protocol (http) and file transfer protocol (ftp) traffic which monitors the data exfiltration. It exfiltrates the scraped information of credit and debit card via Domain Name Server (DNS). Then it sends the collected payment card information to a 'command and control server' server.

Targets one POS platform

Multigrain targets specifically the Windows point of sale system, which has a multi.exe executable file. If Multigrain gets into a POS system that does not have multi.exe then it deletes itself without leaving any trace.

See also

• Point-of-sale malware
• Cyber electronic warfare
• List of cyber attack threat trends
• Malware
• Cyber security standards

References

1. "MULTIGRAIN – Point of Sale Attackers Make an Unhealthy Addition to the Pantry". FireEye.
2. ""Point of Sales (POS) Evolution to DNS Exfiltration"" (PDF).
3. ""Multigrain" PoS Malware Exfiltrates Card Data Over DNS | SecurityWeek.Com". www.securityweek.com. 20 April 2016.
4. "Multigrain PoS malware exfiltrates stolen card data over DNS". Security Affairs. April 20, 2016.
5. "New Multigrain Malware steals Point of Sale Data Over DNS".
6. "Wheat a moment: Multigrain malware uses DNS to steal POS data "
7. Cimpanu, Catalin (19 April 2016). "PoS Malware Steals Credit Card Numbers via DNS Requests". softpedia.
8. Constantin, Lucian (April 20, 2016). "New point-of-sale malware Multigrain steals card data over DNS". Computerworld.
9. "DNS and Stolen Credit Card Numbers". www.circleid.com.
10. Stoyanov, Daniel (April 21, 2016). "PoS Malware 'Multigrain' Steals Credit Card Details via DNS".
11. "SASE Solution - Secure Access Service Edge". Fortinet.
12. Chirgwin, Richard. "VXers pass stolen card data over DNS". www.theregister.com.
13. ""MULTIGRAIN – Point of Sale Attackers Make an Unhealthy Addition to the Pantry"". Archived from the original on 2016-04-22. Retrieved 2016-07-11.
14. "Multigrain Malware Targets Multi.Exe Process, Steals and Exfiltrates Data, Pretending as DNS Queries". www.spamfighter.com.
15. "Article 29 Working Party still not happy with Windows 10 privacy controls". SC Media. February 28, 2017.

• Cyberwarfare
• Windows trojans
• Carding (fraud)