Scan Data Malspam Pretending To Come From Noreply@ Your Own Email Address Tries To Deliver Malware

Office Macro Malware

The next in today’s “blast from the past” attempts to download malware is an email with the subject of scan data pretending to come again from noreply@your own email address

But whichever apprentice is looking after the shop while the boss is on his Easter Holidays has messed up big time. They attached an innocent PDF file that tells you to open the attached scandatannnnnn file. However they forgot to attach that.

No doubt they will soon realise their mistake and send out a new batch, probably with a zip containing the pdf and either a word doc containing macros or a .js file that will download the malware

Update: I might have spoken too soon. I have javascript disabled in adobe reader, so nothing happens when I open the pdf, but several antiviruses on VirusTotal declare this as a malicious PDF file. PDF examiner declares this a suspicious.embedded doc file and suspicious.warning: object contains JavaScript | Payload Security I don’t know how to extract the malware from the pdf manually. Payload security showed the pdf dropped a macro enabled word doc ScanData155328.docm ( VirusTotal) ( Payload Security) | MALWR This contacts super-marv.com/874hv where I get an error message and nothing downloaded. It looks like it should download an encrypted txt file that is converted to redchip2.exe which is likely to make this another version of today’s earlier malspam run that we thought was Dridex but turned out to be kegotip.

Update: this one is Dridex

An alternative pdf gave me Payload Security which downloaded redchip2.exe from hiddencreek.comcastbiz.net/874hv ( virustotal)

They use email addresses and subjects that will 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.

Remember many email clients, 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 work so well.

One of the emails looks like:

From: no-reply@thespykiller.co.uk

Date: Mon 10/04/2021 13:40

Subject: Scan Data

Attachment: Scan_75337.pdf

Body Content:

Number of images: 4

Attachment File Type: PDF

Screenshot:

All these malicious emails are either designed to steal your Passwords, Bank, PayPal or other financial details along with your email or FTP ( web space) log in credentials. Or they are Ransomware versions that encrypt your files and demand large sums of money to recover the files.

All the alleged senders, amounts, reference numbers, Bank codes, companies, names of employees, employee positions, email addresses and phone numbers mentioned in the emails are all 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 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.

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.

There are frequently dozens or even hundreds of different download locations, sometimes delivering the exactly same malware from all locations and sometimes slightly different malware versions from each one. Dridex, Locky and many other malwares do update at frequent intervals during the day, sometimes as quickly as every hour, so you might get a different version of these nasty Ransomware or Banking password stealer Trojans to the version we list here.

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.

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