#1255163: Fake Hillconmining Incoming20414 email delivers Formbook
A very slightly strange and less usual malware campaign this morning that does eventually deliver Formbook. The email is nothing special, very terse & bland that just says ” Kindly find the attachment”. It has 2 Microsoft Word Doc attachments, both very small. the first is 4kb, the second 6kb. Both are actually malformed RTF files that contain CVE2017-11882 Microsoft Equation Editor exploits. These exploits have been fixed in all currently supported versions of Microsoft Office, so in theory, should not affect anybody. But we do see hundreds of victims from these exploits, where lax security patching or the use of out of date and unsupported software is still in use. These were caught by the spam filter on my server and quarantined.
The alleged sending domain hillconmining.com has not been actually 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.
But a misconfiguration of that domain’s DNS settings has allowed the criminals sending these to effectively hijack their email service to make it appear that it does actually come from hillconmining.com. Who ever set up the DNS settings has used an allow “all” on the SPF records so that allows anybody to spoof hillconmining.com and send email on their behalf & it will pass authentication. The criminals have set up an account on a different server to send the emails & made it look like hillconmining.com is hosted on that server. This dodgy server is hosted on AS46664 VolumeDrive who seem to have a very high number of spam and malware senders on their network.
We have been seeing hillconmining.com abused as an email sender for months now & a quick Google search shows scams & malware allegedly sent via that domain for a couple of years. The criminals and scammers switch sending servers frequently & use multiple hosting companies, either setting up fraudulent accounts or compromising existing accounts and adding the details to the account.
It is very difficult to stop this sort of criminal. There is frequently no actual website or fraudulent user account to close. They log in to a compromised account, change host & sending details, blast out the spam, sometimes they reverse all changes, sometimes they leave them hoping to re-use them later, if not discovered and cleaned up and then disappear.
This malware downloads from http://secured.icbegypt.com/davu.123 VirusTotal URL | File | Domain report |URLhaus report on domain | It looks like this compromised or fraudulent site has slipped under the radar somewhat, but has been spewing out malware since at least 28 March 2019.
The C2 is http://www.saibez.com/nu/ which is quite well known as a Formbook C2
Swift.doc Current Virus total detections: Anyrun | I could not get any malware or network content from this one. Using Frank Boldwin’s RTF scanner to examine it I get this message and a malicious warning “!!! This file contains overlay data, which is unusual for legitimate rtf-files !!!” IRIS-H scanner also could not find any url or download site, so it is highly probable the bad actor messed up with this one
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.
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.
Main object- “Payment.doc”
Dropped executable file
sha256 C:\Users\admin\AppData\Local\Temp\Aalr\certmgrp0x.exe a0e0090ab6a39d7f3dba9a28824855371c9e20ec2811beacf71eeb8095171eb7
sha256 C:\Users\admin\AppData\Local\Temp\sqlite3.dll 16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660
Main object- “Swift.doc”
|Date added||April 18, 2019, 6:15 a.m.|