This example is an email containing the subject of ” You have received a Secure Doc message from Citi Secure Email Server ” pretending to come from Citi Group but actually coming from “firstname.lastname@example.org” which is a look-a-like, typo-squatted or other domain that can easily be misidentified, mistaken or confused with the genuine site, with a malicious word doc attachment is today’s latest spoof of a well-known company, bank or public authority delivering Trickbot banking Trojan.
As in today’s earlier example of Trickbot targeting the UK, this also copies the system default PowerShell files to the user temp folder and runs it from there, which bypasses lots of restrictions. It also shows the same attempt to read and steal chrome login & browser data via the trickbot binary itself not one of the additional modules.
You can now submit suspicious sites, emails and files via our Submissions system
From: Citi Group <email@example.com>
Date: Tue 14/08/2018 17:56
Subject: You have received a Secure Doc message from Citi Secure Email Server
You have received a Secure Doc message from Citi Secure Email Server
Open the DOC file attached to this notification. When promted, enter your Secure DOC password to view the message contents.
To reply to this message in a secure manner, it is important that you use the reply link inside the Secure DOC File. This will ensure that any confidential information is sent back securely to the sender.
To recover your SPDF passphrase history or reset your passphrase, please go to the Citi Secure Email: SPDF Password Recovery/Reset Request Page.
Please note: If your message was downloaded from your email, please enable Editing and Content to unlock your document content. Microsoft Office is required to view all SecureDOC messages.
Help is available 24 hours a day by calling 1-866-535-2504 (inside U.S.) or International users call 1-904-954-6181 (collect calls accepted) or by email at firstname.lastname@example.org.
Do not reply to this message. This is a system-generated email and all replies will be discarded.
Citi Group 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 is only newly registered domain 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, that are hosted on & sending emails from 5 different servers.. Some days however we do see dozens or even hundreds of fake domains.
Today’s example of the spoofed domain is, as usual, registered via Godaddy as registrar. Because of new GDPR rules we cannot easily find the registrants name or any further details.
- securemailcenter-citigroup.com hosted on & sending emails via 126.96.36.199| 188.8.131.52 |184.108.40.206| 220.127.116.11| 18.104.22.168|
This word doc uses the typical social engineering tricks to persuade you to enable content & macros
This binary would only run manually when started from the %appdata% directory not form desktop whilke using anyrun, so it looks like some sort of checks by teh malware.
The folder for the files & configs is: C:\Users\[User]\AppData\Roaming\msdesk
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.
Email from: email@example.com