An email with the subject of Remittance Advice: Tue, 16 Feb 16:55:29 +0800 pretending to come from [email protected] with a malicious word doc or Excel XLS spreadsheet attachment is another one from the current bot runs which try to download various Trojans and password stealers especially banking Trojans like Dridex or Dyreza and ransomware like cryptolocker or Teslacrypt.

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-sized businesses, with the hope of getting a better response than they do from consumers.

The time in the subject is random

The email looks like this:

From: [email protected]

Date: Tue 16/02/2021 08:55

Subject: Remittance Advice : Tue, 16 Feb 2021 16:55:29 +0800

Attachment: 202102_4_2218.docm

Body content:

**********************************************************************

Confidentiality: This email and its contents and any attachments are intended

only for the above named. As the email may contain confidential or legally privileged information,

if you are not, or suspect that you are not, the above named or the person responsible

for delivery of the message to the above named, please delete or destroy the

email and any attachments immediately.”

Security and Viruses: This note confirms that this email message has been

swept for the presence of computer viruses. However, we advise that in keeping

with good management practice, the recipient should ensure that the email together

with any attachments are virus-free by running a virus scan themselves.

We cannot accept any responsibility for any damage or loss caused by software viruses.

Monitoring: The Council undertakes to monitor of both incoming and outgoing emails.

You should therefore be aware that if you send an email to a person within the Council

it may be subject to any monitoring deemed necessary by the organisation from time to time.

The views of the author may not necessarily reflect those of the Council.

Access as a public body: The Council may be required to disclose this email (or any response to it)

under the Freedom of Information Act, 2000, unless the information in it is covered

by one of the exemptions in the Act.

Legal documents: The Council does not accept the service of legal documents by email.

**********************************************************************

You can now send any suspicious files for examination by the antivirus companies via our submission system

Previous campaigns over the last few weeks have delivered 5 or 6 and quite often up to 10 or 12 different versions, some with word doc attachments and some with Excel Xls attachments. There are frequently 5 or 6 download locations all delivering exactly the same malware. Dridex does update at frequent intervals during the day, so you might get a different version of this nasty banking and password stealer Trojan.

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.

oldham.gov.uk has not been hacked or had their email or other servers compromised. They are not sending emails to you. They are just innocent victims in exactly the same way as every recipient of these emails.

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.

What Can Be Infected By This

At this time, these malicious macros only infect windows computers. They do not affect a Mac, iPhone, IPad, Blackberry, Windows phone or Android phone.

The malicious word or excel file can open on any device with an office program installed, and potentially the macro will run on Windows or Mac or any other device with Microsoft Office installed. BUT the downloaded malware that the macro tries to download is windows specific, so will not harm, install or infect any other computer except a windows computer. You will not be infected if you do not have macros enabled in Excel or Word. These Macros do not run in “Office Online” Open Office, Libre Office, Word Perfect or any other office program that can read Word or Excel files.

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 [email protected].

The basic rule is to 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 hide 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 .EXE.COM.PIF.SCR .JS 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 words, excel and other office documents that normally contain a VBA macro virus, the vital thing does not to 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 are 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 override 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 outdated or vulnerable version of the word. This is a good reason to update your office programs to a recent version and stop using offices in 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 versions 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.