I seem to be getting all the weird and wonderful malware today, all using different or unusual delivery methods. This next example is about an order confirmation. The attachment is a .uue attachment. Winzip says it can open .UUE files but only extracted a garbled encrypted/encoded txt file. Universal extractor extracted a working .exe file.
They use email addresses and subjects that will entice, persuade, scare or shock a recipient to read the email and open the attachment.
One of the emails looks like:
Date: Fri 29/09/2017 11:08
Subject: Fwd: Re: Order
I Have been trying to contact you but no response from your side and left you a message to call me back, sent you a mail but no answer ,i am writing again with our alternative email, please let me know whats happening with our order confirmation as we need new shipment for the year.please find attached our order details and send me the order confirmation and if nothing is happening let me know so we will start looking for another company.
Thanks and Best Regards,
Officina Meccanica Tomè Roberto
Via Bellasio 15
33084 Cordenons PN
Tel: 0434 40472 Fax: 0434 40609
cell: 348 3044372
order confirmation #19323
|184.108.40.206||ns2.vsdesignworx.com||Conshohocken||Pennsylvania||US||AS33480 Web Werks|
|220.127.116.11||18.104.22.168.cn.zp.ua||Khortitsa||Zaporiz’ka Oblast’||UA||AS47359 Tvoi Net Ltd.|
Received: from ns2.vsdesignworx.com ([22.214.171.124]:56699 helo=ns1.iuphost.com)
by knight.knighthosting.co.uk with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256)
for firstname.lastname@example.org; Fri, 29 Sep 2017 11:08:29 +0100
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;
d=pecindia.com; s=default; h=Reply-To:Date:From:To:Subject:MIME-Version:
Received: from [126.96.36.199] (port=52670 helo=Gentle-PC.mshome.net)
by mail.iuphost.com with esmtpa (Exim 4.89)
id 1dxsDQ-0008BK-LI; Fri, 29 Sep 2017 15:38:20 +0530
Content-Type: multipart/mixed; boundary=”===============2017186997==”
Subject: Fwd: Re: Order
To: Recipients <email@example.com>
Date: Fri, 29 Sep 2017 03:08:00 -0700
X-AntiAbuse: This header was added to track abuse, please include it with any abuse report
X-AntiAbuse: Primary Hostname – mail.iuphost.com
X-AntiAbuse: Original Domain – thespykiller.co.uk
X-AntiAbuse: Originator/Caller UID/GID – [47 12] / [47 12] X-AntiAbuse: Sender Address Domain – pecindia.com
X-Get-Message-Sender-Via: mail.iuphost.com: authenticated_id: firstname.lastname@example.org
X-Authenticated-Sender: mail.iuphost.com: email@example.com
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.
Previous campaigns over the last few weeks have delivered numerous different download sites and malware versions. There are frequently 5 or 6 and even up to 150 download locations on some days, sometimes delivering the exactly same malware from all locations and sometimes slightly different malware versions. Locky does update at frequent intervals during the day, sometimes as quickly as every hour, so you might get a different version of these nasty Ransomware.
This is another one of the files that unless you have “show known file extensions enabled“, can easily be mistaken for a genuine DOC / PDF / JPG or other common file instead of the .EXE / .JS file it really is, so making it much more likely for you to accidentally open it and be infected.
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. Whether it is a message saying “look at this picture of me I took last night” and it appears to come from a friend or is more targeted at somebody who regularly is likely to receive PDF attachments or Word .doc attachments or any other common file that you use every day.
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.
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. Many 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” or a report in word document format that work has supposedly sent you to finish working on at the weekend, or an invoice or order confirmation from some company, 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.
While the malicious program is inside the zip file, it cannot harm you or automatically run. When it is just sitting unzipped in your downloads folder it won’t infect you, provided you don’t click it to run it. Just delete the zip and any extracted file and everything will be OK. You can always run a scan with your antivirus to be sure. There are some zip files that can be configured by the bad guys to automatically run the malware file when you double click the zip to extract the file. If you right click any suspicious zip file received, and select extract here or extract to folder ( after saving the zip to a folder on the computer) that risk is virtually eliminated. Never attempt to open a zip directly from your email, that is a guaranteed way to get infected. The best way is to just delete the unexpected zip and not risk any infection.