The Trickbot delivery system has changed again today with a newish multi-faceted download system.
This example is an email containing the subject of “Lloyds Bank Secure Exchange: New Message Received ” pretending to come from Lloyds Bank but actually coming from a look-a-like or typo-squatted domain “email@example.com” with a html attachment which will download a malicious word doc is today’s latest spoof of a well-known company, bank or public authority delivering Trickbot banking Trojan
This version is probably using Threadkit which is an office doc exploit builder using the Microsoft Equation Editor Exploit CVE-2017-11882 and other office exploits instead of Macros.. This is one reason to add additional security and make sure you set RTF files to display only and not allow editing of RTF files at all. That will stop this and any other currently known exploit from running.
You can now submit suspicious sites, emails and files via our Submissions system
From: Lloyds Bank <firstname.lastname@example.org>
Date: Tue 29/05/2018 12:55
Subject: Lloyds Bank Secure Exchange: New Message Received
This is a Lloyds Bank secure, encrypted message.
Open the attachment (message_zdm.html) and follow the instructions.
Get the mobile application.
Disclaimer:This email and any attachments are confidential and for the sole use of the recipients. If you have received this email in error please notify the sender.
Email Security Powered by Voltage IBE(tm)
Lloyds 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 examples of the spoofed/typo-squatted domains are registered via Godaddy as registrar using privacy protection services
- lloyds-se.com hosted behind cloudflare but emails sent via 126.96.36.199 Naaldwijk Zuid-Holland NL AS49981 WorldStream B.V | 188.8.131.52 AS60781 LeaseWeb Netherlands B.V. | 184.108.40.206 Tempe Arizona US AS20454 SECURED SERVERS LLC | 220.127.116.11 AS60778 NETBRELLA CORPORATION
- lloyds-dl.com also behind Cloudflare so I don’t know the actual download site, but am assuming it is hosted by one of the sites that are sending the emails.
So we have the attached HTML file downloading https://lloyds-dl.com/AccountDocuments.docx ( VirusTotal) which in turn downloads http://galeona.com/logopic.jpg ( VirusTotal) which is not an image file but actually a RTF file using one or more of the Microsoft Equation Editor Exploits. I am not 100% sure how they rename or run the rtf from the docx file. All I do know is they use the web setting document rels to open the url and I assume rely on filetype headers for word to run the downloaded content.
The next stage is the typical download of the Trickbot binary from http://rsaustria.com/soperos.bin which is a renamed .exe file ( VirusTotal) Gtag ser 0529
The alternate Download location is http://galeona.com/soperos.bin
They are still using C:\Users\user name\AppData\Roaming\freenet\ for the file, module & config locations. They started to use this on Friday 25 May 2018 . They are still using MsSysToken for the scheduled task(s) to keep the malware persistent. I am not seeing exactly which modules this is running in Anyrun today, but I think the time out occurred before the full run.
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.