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Friday 25 July 2014

"eFax message" spam

Another tired old spam template leading to malware..

From:     eFax Corporate [message@inbound.efax.com]
Date:     25 July 2014 14:25
Subject:     eFax message - 4 pages

Fax Message [Caller-ID: 948-468-7596]

You have received a 4 pages fax at 2014-07-25 13:24:21 GMT.

* The reference number for this fax is latf1_did11-1187609582-1911573644-58.

View this fax using your PDF reader.

Click here to view this message

Please visit www.eFax.com/en/efax/twa/page/help if you have any questions regarding this message or your service.

Thank you for using the eFax service!
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In this case the link in the email goes to verzaoficial.com/css/fax_390392029_072514.exe which downloads a file with a VirusTotal detection rate of just 1/45. Automated analysis [pdf] is fairly inconclusive as to what it does.

4 comments:

Unknown said...

so what can we do to filter/block them without blocking our actual efax emails?

Nunya Business said...

You should be able to block .scr files and block it. It shows the icon of a PDF file but it's actually a .scr file (an executable screensaver)

Also,
If the domain is the same as the one we got, if you have a web filter you could block http://sendgrid.org (the legit site is sendgrid.com)

Nunya Business said...
This comment has been removed by the author.
Unknown said...

A real fax notification from eFax would include a Fax attachment as a PDF, TIFF or EFX. The email wouldn't contain a (fake) link to read the fax.