Welcome to Freaky Friday. Whichever apprentice has been left in charge of the Necurs botnet this Friday has messed up AGAIN!!. Instead of actually attaching a 7z attachment to the email, he or she has somehow managed to embed a base64 encoded \u201cfile\u201d as plain text in the email body instead.<\/p>\n
This isn\u2019t the first time this has happened recently and we can all be quite glad a days respite form the constant onslaught of Globeimposter ransomware being sent by this spam. It is trivially easy for a researcher to decode the content, create the 7z archive and then extract the javaScript file. But most recipients will either just see a load of garbled text, or the virus scanner on the mailserver should see these as unscannable or undeliverable so automatically quarantine them. All the several hundred I have received in the last hour have been quarantined on my mail server.<\/p>\n
The next in the never ending series of malware downloaders is an email with the subject of Scan pretending to come from random names and email address<\/p>\n
The name in the email body matches the alleged sender<\/p>\n
They use email addresses and subjects that will entice, persuade, scare or shock a recipient to read the email and open the attachment.<\/p>\n
You can now submit suspicious sites, emails and files via our Submissions system<\/strong><\/p>\n Scan_0041.7z : Extracts to: -6dt874p53077.js Current Virus total detections: Hybrid Analysis | Anyrun Beta | VirusBay<\/p>\n This particular js has these 3 urls embedded in it ( there will be dozens of other Urls that download the payload in different js files) It uses the first url & only moves to the next if the first does not respond ( VirusTotal) ( VirusBay)<\/p>\n <\/p>\n One of the emails looks like:<\/p>\n From:<\/strong> Fidel <Fidel_Oates@erickaustria.com><\/p>\n Date:<\/strong> Fri 29\/12\/2021 09:49<\/p>\n Subject:<\/strong> Scan<\/p>\n Attachment<\/strong>: Scan_0041.7z<\/p>\n boundary=\u201d\u2014\u2014\u2014\u2014582614573266866175146333\u2033<\/p>\n This is a multi-part message in MIME format.<\/p>\n \u2014\u2014\u2014\u2014\u2013582614573266866175146333<\/p>\n Content-Type: text\/plain; charset=ISO-8859-1; format=flowed<\/p>\n Content-Transfer-Encoding: 7bit<\/p>\n \u2014<\/p>\n Thanks & Regards<\/p>\n Fidel Oates (F&A)<\/p>\n \u2014\u2014\u2014\u2014\u2013582614573266866175146333<\/p>\n Content-Type: application\/octet-stream;<\/p>\n name=\u201dScan_0041.7z\u201d<\/p>\n Content-Transfer-Encoding: base64<\/p>\n Content-Disposition: attachment;<\/p>\n filename=\u201dScan_0041.7z\u201d<\/p>\n N3q8ryccAARHGN9T4A4AAAAAAABqAAAAAAAAADmjYI\/gNekO2F0ABoLPY0Z+Zx1HuK5s+AXy<\/p>\n FcDmK0S7XAJb2HVZgoobOPEdGsWn97cBz7seY8wZGoNvzm+tQuTK7nB5PKT8z4v\/PfJtQVMX<\/p>\n FDXFfXHduJJPKLxVNQWrjhd+XkhdyuHJGjil\/a\/WLt2UpfnxtMOIoWPlTUlk6xFuH8rNIMMN<\/p>\n PIG99jC\/jLVxkTrX97A+HV4vkbCqUHcwiY+pyA0uXzHK9piFQxlR2dj7ik5KQCRrtF2ayAYz<\/p>\n R6ItkY7yeRzHtlFPf25MINh75uoTvzncS2qBxCSGPVE1tKEOSzHzURPAslJH9USdYcvAn8Ti<\/p>\n KCj0MB0D08zJcIPtxFwlL+ku0HFKHvMEaYyoq+\/KbtzHInX\/AAl0nk7xPpvq3OCIaZMn7Ocs<\/p>\n <Snipped><\/p>\n 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\u2019t.<\/p>\n Don\u2019t 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.<\/p>\n Please read our How to protect yourselves page<\/a> for simple, sensible advice on how to avoid being infected by this sort of socially engineered malware.<\/p>\n 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.<\/p>\n\n
Body Content:<\/strong><\/h3>\n
Screenshot:<\/strong><\/h3>\n