Colorful spams are back!

Yeeesss, the Spam/Trash folder is no longer so boring!

Finally, the spammers are now using all the features of the email clients and have made the subjects to look much nicer.

Do you know how they do that?

They add UTF8 characters in the subject and then they encode the entire string using Quoted-Printable encoding:

Content-Type: text/html; charset="utf-8"
Content-Transfer-Encoding: quoted-printable
Subject: =?utf-8?q?=F0=9F=91=B6_Free_Trial_of_Diapers_from_The_Honest_Company_?=
 =?utf-8?b?8J+Rtg==?=

This is the output:

 

Another example:

Content-Type: text/html; charset="utf-8"
Content-Transfer-Encoding: quoted-printable
Subject: =?utf-8?b?8J+YqCBXaWZlIFdhbGtlZCBJbiAtIE9PUHMhISEhISDwn5io?=



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About the Author

Sorin Mustaca
Sorin Mustaca, (ISC)2 CSSLP, CompTIA Security+ and Project+, is working since year 2000 in the IT Security industry and worked between 2003-2014 for Avira as Product Manager for the known products used by over 100 million users world-wide. Today he is an independent IT Security Consultant focusing on Cybersecurity, secure software development and security for IoT and Automotive. He is also running his personal blog Sorin Mustaca on Cybersecurity and is the author of the free eBook Improve your security .
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