How a free breakfast day at McDonalds can lead to malware danger

Filed Under: Malware, Spam

McDonaldsI don't know if you're the sort of person who wakes up in the morning, and the first thing you long for is a McDonalds' breakfast - but if you are, you might just be exactly what malware authors are looking for.

Researchers at SophosLabs have seen a malicious email that has been spammed out across the world in the last couple of days pretending to come from McDonalds.

The email claims that the fast-food giant is offering free breakfasts in each and every of their many thousands of restaurants around the globe. Chances are that there are many people who would love the prospect of munching on a McDonalds first thing in the morning.

McDonalds malware email

Part of the email reads as follows:

McDonalds invites you to The Free Breakfast Day which will take place on 26 June, 2011, in every cafe of ours.

Free Day’s menu!
- Ranch Snack Wrap (Crispy)
- Chicken Selects Premium Breast Strips
- Premium Caesar Salad with Grilled Chicken
- Strawberry Triple Thick Shake
- McCafe Hot Chocolate

Print the invitation card attached to the letter and show it at the cash desk of any of our restaurants.

But beware! There is no such thing as a free lunch.. breakfast.

The attached file is, of course, malicious. Sophos detects the ZIP file as Troj/BredoZp-DV and the Invitation_Card.exe file contained within as the Troj/Bredo-HU Trojan horse.

In an attempt to fool computer users into believing the file is safe, the EXE file has a Word icon.

Don't forget - you should always be suspicious of unsolicited attachments sent to you via email!

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13 Responses to How a free breakfast day at McDonalds can lead to malware danger

  1. Clash says:

    Yeah I probably wouldn't open the attachment but I might have been prone to showing up at a McDonald's on the morning of the 26th.

  2. Chris says:

    I'll be sure to ask the helpful employee at the cash desk of my local McDonalds cafe whether I can have a free hamburger for breakfast.

    Scammers need to find people that have at least SOME grasp of the terms and idioms in the target culture. This would probably be even more successful if the wording didn't scream "SCAM SCAM SCAM." Of course, I guess we WANT our scammers stupid...

  3. Paul says:

    I loved the sign off. "Thank you for your credence. We really appreciate it"!!
    Sort of gives the game away.

  4. Paul Black says:

    Having just received the said email in my in-box this morning I appreciate that you've flagged it up. The 'thank you for your credence' is definitely a nice touch, with its coded way of saying intelligent people with a good knowledge of English you'll probably spot this. Thanks for posting the warning.

  5. judith says:

    Thanks for the warning, it just arrived in my inbox and i google dit before opening

  6. Guest says:

    Just got it here in Sweden! Great with Google to get confirmation of the fake.
    Blame to the crook!!

  7. sunshinelove says:

    Traced the ip...it originates in sweden

  8. Louis says:

    I regrettably opened the file, is there a solution out there,,??

  9. Sivoch says:

    I didn't know it was a hoax and opened it up thankfully my computer protection picked it up and didn't allow it to open! I will always look up suspicious emails from now on from this website.

  10. Brutus says:

    Sivoch You should change the next to last word in your comment from "this" to "any."

  11. @jonpaulwade says:

    So many people out scamming these days. Mind you, McDonalds in the UK make a habit of charging their customers unreasonable fees for using their car parks. If that is not a scam, what is?

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About the author

Graham Cluley has worked in the computer security industry for more than 20 years, developing anti-virus software and doing quite a lot of talking about internet threats. He's won awards for his blogging, but is proudest of the text adventure games he wrote when he was still wearing short trousers. You can learn more about those (the games, not the trousers) at grahamcluley.com. Send Graham an email, subscribe to his updates on Facebook, follow him on Twitter and App.net, and circle him on Google Plus for regular updates.