Malware attack! “You have received a secure message”

SophosLabs is intercepting a widespread malware attack, spammed out via email, posing as a secure message.

The emails, which have the subject line of “You have received a secure message”, attempt to trick recipients into opening an attached ZIP file.

However, contained inside the ZIP file – securedoc.zip – is a Trojan horse that Sophos products detect as Troj/Zbot-DPM.

Here is what a typical message looks like (click on the image for a fuller version):

You have received a secure message

Read your secure message by opening the attachment, SECUREDOC. You will be prompted to open (view) the file or save (download) it to your computer. For best results, save the file first, then open it.

If you have concerns about the validity of this message, please contact the sender directly. For questions about Key’s e-mail…

Read more in my article on the Naked Security website.

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Graham Cluley •   @gcluley

Graham Cluley is a veteran of the cybersecurity industry, having worked for a number of security companies since the early 1990s when he wrote the first ever version of Dr Solomon's Anti-Virus Toolkit for Windows. Now an independent analyst, he regularly makes media appearances and is an international public speaker on the topic of cybersecurity, hackers, and online privacy. Follow him on Twitter, Mastodon, Bluesky, or drop him an email.