Trickbot have had another change today and reverted to the good old fashioned, tried and trusted macros to deliver the payload.
This example is an email containing the subject of “You have a new encrypted message” pretending to come from NatWest Bank but actually coming from a look-a-like or typo-squatted domain “firstname.lastname@example.org” with a malicious word doc attachment is today’s latest spoof of a well-known company, bank or public authority delivering Trickbot banking Trojan
You can now submit suspicious sites, emails and files via our Submissions system
From: Natwest <email@example.com>
Date: Wed 16/05/2018 12:30
Subject: You have a new encrypted message
This is an encrypted message.
Open the attachment (encrypted_message.doc) and follow the instructions.
This secure message was sent to: firstname.lastname@example.org.
Disclaimer: This e-mail and any files transmitted are confidential and intended solely for the use of
the individual or entity to whom they are addressed. It may also be legally privileged. If you are not
the addressee you may not copy, forward, disclose or use any part of it. If you have received this
e-mail in error please delete it and all copies from your system and notify the sender immediately
by return e-mail.
Internet communications cannot be guaranteed to be timely, completely secure, error or virus-free.
The sender does not accept liability for any errors or omissions.
By using SecureMail to access your message, you agree to our Privacy Statement and Terms and Conditions
Email Security Powered by Voltage IBE(tm)
© 2005-2018 National Westminster Bank plc
NatWest Bank 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, Bank, Government or message sending services. Normally there are between 2 and 4 newly registered domains that imitate Companies House, HMRC, another Government department, a Bank, file hosting service or a message sending service that can easily be confused with the genuine organisation in some way. Some days however we do see dozens or even hundreds of fake domains.
Today’s example of the spoofed domains has changed from being registered via Godaddy as registrar using privacy protection services to using Tucows as registrar but still with privacy protection
- nwolbsec.co.uk hosted on & sending emails via 126.96.36.199 AltusHost B.V. AS51430 | 188.8.131.52 LeaseWeb Netherlands B.V. AS60781| 184.108.40.206 NL AS60781 LeaseWeb Netherlands B.V. | 220.127.116.11 Tempe Arizona US AS20454 SECURED SERVERS LLC |
This malware doc file downloads from http://basarteks.com/gobror.bin which is a renamed .exe file ( VirusTotal) Gtag Ser 0516
The alternate Download location is http://chimachinenow.com/gobror.bin
The folder location for files & configs has also changed again today to C:\Users\username\AppData\Roaming\diskcheck
The scheduled task is now MsSysToken
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 spreadsheet files and PowerPoint etc that are downloaded from the web or received in an email automatically in “protected view” that stops any embedded malware, macros and DDE “exploit /Feature” and embedded ole objects 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. If the protected mode bar appears when opening the document DO NOT follow the advice they give to enable macros or enable editing to see the content. The document will have a warning message, but you will be safe.
Be aware that there are a lot of other 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 outweighing the convenience, benefits and cost of keeping an old version going.
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
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.