An email with the subject of eFax message from “0300 200 3835” – 2 page(s) pretending to come from efax but actually coming from a look alike domain eFax <email@example.com> with a malicious word doc attachment is today’s latest spoof of a well known company, bank or public authority delivering Sharik /Smoke /Dofoil Trojan. The last set of these we received also eventually downloaded Trickbot banking Trojan, although online sandboxes’ didn’t show that. I think it sleeps or delays the download of additional malware for too long for the sandboxes to deal with.
They are using email addresses and subjects that will scare or entice a user to read the email and open the attachment. A very high proportion are being targeted at small and medium size businesses, with the hope of getting a better response than they do from consumers.
Remember many email clients, especially on a mobile phone or tablet, only show the Name in the From: and not the bit in <domain.com >. That is why these scams and phishes work so well.
Efax has not been hacked or had their email or other servers compromised. They are not sending the emails to you. They are just innocent victims in exactly the same way as every recipient of these emails.
What has happened is that the criminals sending these have registered various domains that look like genuine company or Government domains. They used to register 3 or 4 newly registered domains that imitate the company or Government department or some message sending service that can easily be confused with a legitimate organisation in some way that send these. So far today I have found nearly 300 similar domains all based on mail.efaxcorporatexxx.top where xxx is a number from 100-399
mail.efaxcorporate254.top was registered on 5th June 2017 via publicdomainregistry.com using what are obviously fake details and hosted on a Russian server 22.214.171.124. Other variants of the domain are hosted on other IPs in the ‘’126.96.36.199 – 188.8.131.52′ and ‘184.108.40.206 – 220.127.116.11’ ranges Other variants of this were registered between 1st and 5th June 2017
I first saw this criminal gang imitating UK government departments or Agencies on April 2017 https://myonlinesecurity.co.uk/spoofed-hmrc-vat-return-and-payment-overdue-malspam-delivers-malware/ but didn’t realise the extent of their activities and the number of domain variants being registered and used
I only realised when we saw https://myonlinesecurity.co.uk/fake-hmrc-final-payment-request-malspam-delivers-sharik-smoke-trojan/
The criminal gang uses the .top domain service to register & host at least 100 variations of the domain at a time and use all of them to send malspam that passes all authentication checks. They even go the extent of creating reverse-PTR. Each variant of the domain is on its own IP address. so a lookup of mail.efaxcorporate254.top gives 18.104.22.168 and a reverse lookup of 22.214.171.124 gives mail.efaxcorporate254.top . That shows determination and many legitimate sites don’t do that correctly. They have done this on the entire 100 registered variants of the domain.
The email looks like:
From: eFax <firstname.lastname@example.org>
Date: Wed 07/06/2017 18:02
Subject: eFax message from “0300 200 3835” – 2 page(s)
Fax Message [Caller-ID: 0300 200 3835]
You have received a 2 page(s) fax at 2017-06-07 12:10:12 GMT.
* The reference number for this fax is lon1_did28-9874565646-1496754696-302.
Please visit www.efax.com/en/online_fax_FAQ if you have any questions regarding this message or your service.
Thank you for using the eFax service!
Home Contact Login
© 2017 j2 Global, Inc. All rights reserved. eFax® is a registered trademark of j2 Global, Inc.
This account is subject to the terms listed in the eFax® Customer Agreement.
The word doc when opened safely in protected mode looks like this which pretends to be an HM land registry notification. They must be getting confused because they used the Land Registry as the lure several days ago and must have forgotten to switch out the word template FAX_20170607_1496754696_302.doc Current Virus total detections: Payload Security shows a download from http://126.96.36.199/jun7.exe gets renamed to Pvmzgo.exe and autorun ( VirusTotal) Payload Security The malware on http://188.8.131.52 is being updated at frequent intervals ( currently still using jun7.exe ) but I have seen 2 different versions since I originally posted 10 hours ago VirusTotal   Payload Security
Update 8 June 2017: another run of same email coming from same set of eFax <email@example.com> sites but with a slightly different word attachment that looks like:
fax_20170608_96784512_336.doc Current Virus total detections: Payload Security shows a download from http://184.108.40.206/jun8.exe gets renamed to Gqkdau.exe and autorun ( VirusTotal) Payload Security
All the alleged senders, companies, names of employees, phone numbers, amounts, reference numbers etc. mentioned in the emails are all innocent and are just picked at random. Some of these companies will exist and some won’t. Don’t try to respond by phone or email, all you will do is end up with an innocent person or company who have had their details spoofed and picked at random from a long list that the bad guys have previously found . The bad guys choose companies, Government departments and other organisations with subjects that are designed to entice you or alarm you into blindly opening the attachment or clicking the link in the email to see what is happening.
This email attachment contains what appears to be a genuine word doc or Excel XLS spreadsheet with either a macro script or an embedded OLE object that when run will infect you.
Modern versions of Microsoft office, that is Office 2010, 2013, 2016 and Office 365 should be automatically set to higher security to protect you.
By default protected view is enabled and macros are disabled, UNLESS you or your company have enabled them. If protected view mode is turned off and macros are enabled then opening this malicious word document will infect you, and simply previewing it in windows explorer or your email client might well be enough to infect you. Definitely DO NOT follow the advice they give to enable macros or enable editing to see the content.
Most of these malicious word documents either appear to be totally blank or look something like these images when opened in protected view mode, which should be the default in Office 2010, 2013, 2016 and 365. Some versions pretend to have a digital RSA key and say you need to enable editing and Macros to see the content. Do NOT enable Macros or editing under any circumstances.
Please read our How to protect yourselves page for simple, sensible advice on how to avoid being infected by this sort of socially engineered malware. Also please read our post about word macro malware and how to avoid being infected by them
Be very careful with email attachments. All of these emails use Social engineering tricks to persuade you to open the attachments that come with the email. It might be a simple message saying “look at this picture of me I took last night” that appears to come from a friend. It might be a scare ware message that will make you open the attachment to see what you are accused of doing. Frequently it is more targeted at somebody ( small companies etc.) who regularly receive PDF attachments or Word .doc attachments or any other common file that you use every day, for example an invoice addressed to firstname.lastname@example.org.
The basic rule is NEVER open any attachment to an email, unless you are expecting it. Now that is very easy to say but quite hard to put into practice, because we all get emails with files attached to them. Our friends and family love to send us pictures of them doing silly things, or even cute pictures of the children or pets. Many of us routinely get Word, Excel or PowerPoint attachments in the course of work or from companies that we already have a relationship with.
Never just blindly click on the file in your email program. Always save the file to your downloads folder, so you can check it first. A lot of malicious files that are attached to emails will have a faked extension. That is the 3 letters at the end of the file name. Unfortunately windows by default hides the file extensions so you need to Set your folder options to “show known file types. Then when you unzip the zip file that is supposed to contain the pictures of “Sally’s dog catching a ball”, an invoice or receipt from some company for a product or service or receive a Word doc or Excel file report that work has supposedly sent you to finish working on at the weekend, you can easily see if it is a picture or document & not a malicious program. If you see JS or .EXE or .COM or .PIF or .SCR or .HTA .vbs, .wsf , .jse .jar at the end of the file name DO NOT click on it or try to open it, it will infect you.
With these malformed infected word, excel and other office documents that normally contain a vba macro virus, the vital thing is do not open any office document direct from your email client or the web. Always save the document to a safe location on your computer, normally your downloads folder or your documents folder and scan it with your antivirus. Many Antiviruses do not natively detect vba macro-viruses in real time protection and you need to enable document or office protection in the settings. Do not rely on your Anti-Virus to immediately detect the malware or malicious content. DO NOT enable editing mode or enable macros
All modern versions of word and other office programs, that is 2010, 2013, 2016 and 365, should open all Microsoft office documents that is word docs, excel files and PowerPoint etc that are downloaded from the web or received in an email automatically in “protected view” that stops any embedded malware or macros from being displayed and running. Make sure protected view is set in all office programs to protect you and your company from these sorts of attacks and do not over ride it to edit the document until you are 100% sure that it is a safe document. If the protected mode bar appears when opening the document DO NOT enable editing mode or enable macros the document will look blank or have a warning message, but will be safe.
Be aware that there are a lot of dodgy word docs spreading that WILL infect you with no action from you if you are still using an out dated or vulnerable version of word. This is a good reason to update your office programs to a recent version and stop using office 2003 and 2007. Many of us have continued to use older versions of word and other office programs, because they are convenient, have the functions and settings we are used to and have never seen a need to update to the latest super-duper version. The risks in using older version are now seriously starting to outweigh the convenience, benefits and cost of keeping an old version going.
I strongly urge you to update your office software to the latest version and stop putting yourself at risk, using old out of date software.