Yet another Gandcrab ransomware campaign. This time spoofing DHL Express with a fake delivery notification email. This delivers Gandcrab 5.2 ransomware that currently does not have free decryption available yet. This bad actor is getting a bit lazy and has reused the same word template that we saw earlier in the week with the CDC version to deliver the malware. All they have done is changed the file download url in the macro. It is highly likely that they are using an off the shelf exploit kit, rather than actually creating the docs themselves. However they are using different sending email addresses and servers to the previous campaign. This looks like a hacked or compromised account, probably through stolen credentials, rather than shenanigans with DNS compromises that we have seen recently.
As far as I can tell Gandcrab is an affiliate style ransomware, where each affiliate has a specific id code in the ransomware txt url ( The Tor Link )
I am informed by an AV analyst that I follow on Twitter that this is a modified version of Gandcrab 5.2 and not the same as previously seen versions
They are using email addresses and subjects that will scare, shock, persuade or entice a recipient to read the email and open the attachment.
Remember many email clients or webmail services, especially on a mobile phone or tablet, only show the Name in the From: and not the bit in <domain.com >. That is why these scams and phishes and malware deliveries work so well.
You can now submit suspicious sites, emails and files via our Submissions system
Neither DHL Nor aa.com ( American Airlines) 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. These came from what looks like a hacked or compromised account.
The email looks like:
From: DHL EXPRESS <email@example.com>
Date: Thu 14/03/2019 21:48
Subject: Urgent delivery
Attachment: DHL Invoice139789.doc
Dear DHL Recipient,
You have a package coming to you.
This message was brought to notify you that your package is sent to our distribution warehouse. To validate the actual status of a package, to view your invoice open attached.
DHL IS HERE FOR YOU
Thank you for choosing DHL Express. Providing you exceptional services and fast at the best possible rates. If you have any questions? Please get in touch with our Customer Service:
For online Support services, please click right here <http://www.dhl-usa.com/cs2> .
DHLÂ© 2018. DHL Express. DHLBrandmark, and the yellow colors are logos of DHL Express, Inc.
All trademarks,names, or service marks that show up in association with DHL companies are the property of their respective proprietors.
Don’t answer directly to this letter.
This notice keeps personal details. In case you are not the intended individual, the copying disclosure or other use of the details of this message is forbidden and you are recommended to remove this information instantly.
The Word doc attachment is almost empty with just an Urgent Notice Heading. The scumbags trying to compromise you are hoping that you will enable content & editing to enable the macros that let this run.
This malware doc downloads from http://188.8.131.52/rozita.exe ( VirusTotal)
The C2 for this is a well known site https://www.kakaocorp.link/uploads/tmp/imkeesda.jpg where the ransomware posts encrypted / encoded details about the compromised computer.
As usual this still drops a text file in each folder that it has encrypted and changes the desktop background
The ransom note looks like this ( I have blurred out a lot of the content) the computer data section is the same as the details sent to the C2
|184.108.40.206||162-241-154-149.unifiedlayer.com||Provo||Utah||US||AS46606 Unified Layer|
|220.127.116.11||brettbeck.clientshostname.com||Fremont||California||US||AS14576 Hosting Solution Ltd.|
Received: from [18.104.22.168] (port=55602 helo=iba.ibafrica.net) by my email server with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91) (envelope-from <firstname.lastname@example.org>) id 1h4YD5-00089H-Mt for email@example.com; Thu, 14 Mar 2019 21:48:20 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=ibafrica.net; s=default; h=Content-Type:MIME-Version:Date:Subject:To:From: Reply-To:Message-ID:Sender:Cc:Content-Transfer-Encoding:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:In-Reply-To:References:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=Sa8D+AAVZMSXN5xAICFrhvkGAOcJRBUcsJmKpE374Io=; b=mmANOxSjVAulq6jhcZWidOSUVH pol5+Ua6MMfDrOQ8PLt4VehB5gzoBYL2mktsOMbOJdeJOOdZ506feKavANEHTTf7aN7h8N0LLnVSm myNhSEnEIViF9iMuHYqDYNlAl4n0JZ9cdi4DBHzdaBw1jp6pU0SJ7842D+vUZJqGGt2eI1BYQ3n4D xrgZVnhtVCdwvnp/wgcC6E9yHghXXR3l80cYjeqwDhw7u+MsRDCrteC2ZTjYaZky2CTQNXfqrvqop QNK+8XVisHGhpr3aF53LlJFZ+KJDvKQSSRfcLGn28FOzF0HB3jvDOAyNq6mo246ZAiU0OIWjQxgjq LLW0XF8A==; Received: from [22.214.171.124] (port=54664 helo=qkyj) by iba.ibafrica.net with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91) (envelope-from <firstname.lastname@example.org>) id 1h4YD4-0000ID-GP for email@example.com; Thu, 14 Mar 2019 15:48:18 -0600 Message-ID: <firstname.lastname@example.org> Reply-To: "DHL EXPRESS" <email@example.com> From: "DHL EXPRESS" <firstname.lastname@example.org> To: <email@example.com> Subject: Urgent delivery Date: Thu, 14 Mar 2019 14:47:34 -0700 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="2bd19ab64490bf4c9095dc5307d3d2a06f50" X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - iba.ibafrica.net X-AntiAbuse: Original Domain - victimsdomain.com X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - aa.com X-Get-Message-Sender-Via: iba.ibafrica.net: authenticated_id: firstname.lastname@example.org X-Authenticated-Sender: iba.ibafrica.net: email@example.com X-Source: X-Source-Args: X-Source-Dir:
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.
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 firstname.lastname@example.org.
The basic rule is 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 hides 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 JS or .EXE or .COM or .PIF or .SCR or .HTA .vbs, .wsf , .jse .jar 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 word, excel and other office documents that normally contain a vba macro virus, the vital thing is do not 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 is 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 over ride 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 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 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.
Main object- “DHL Invoice139789.doc”
Dropped executable file
sha256 C:\windows\temp\5.exe 0b46963657fb907372ec55ffde8712a45654de146a244d7604e73dcb2bf599ce