A blank/empty email with the subject of Document1 pretending to come from your own email address and sent to your own email address with a zip attachment is another one from the current bot runs which downloads Locky ransomware or Dridex banking Trojan
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.
Update: a second run of this malspam with Document2 as the subject and Document2.zip as the attachment
Another Update 17 March 2016 10.30 am UTC: They have updated this malspam run and they are now using random document numbers I am seeing numbers from 1 to 99 with the zip attachment matching the subject number eg: Document63.zip
Update 18 March 2016: The Locky distribution gangs are obviously learning from the UK and other supermarkets and giving a BOGOF ( Buy One, Get One Free) special offer. Open the file and have all your details stolen and then get all your files encrypted and pay a ransom to get them back
Back to document2 and document2.zip today but with a difference in the payload. now the nemucod .JS downloader inside the zip contacts 2 different download locations and downloads Locky ransomware from 1 location and a password stealer from the second location. This is really evil, first they steal your passwords, bank details and anything and everything else that they want, then they lock and encrypt all your files and demand a ransom of several hundred UK pounds or US dollars in bitcoins to give it back
2nd Update 18 March 2016: yet another run of this Malspam aimed to catch workers rushing to leave on a Friday afternoon. They have reverted to a single download of Locky via the .JS nemucod downloader. Document2476.js VirusTotal MALWR same file name as earlier from http://naairah.com/wp-content/plugins/hello123/j7u7h54h5.exe VirusTotal
The email looks like:
From: your own email address
Date: Wed 16/03/2016 11:58
Body content: totally blank
These malicious attachments normally have a password stealing component, with the aim of stealing your bank, PayPal or other financial details along with your email or FTP ( web space) log in credentials. Many of them are also designed to specifically steal your Facebook and other social network log in details. A very high proportion are Ransomware versions that encrypt your files and demand money ( about £350/$400) to recover the files.
All the alleged senders, companies, names of employees, amounts, reference numbers and phone numbers 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 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.
You can now send any suspicious files for examination by the antivirus companies via our submission system
16 March 2016 : Document1.zip: Extracts to: CDF6840557603.js Current Virus total detections: MALWR shows a download of Locky ransomware from http://winjoytechnologies.com/v4v5g45hg.exe ( VirusTotal) which is a different Locky binary from this earlier malspam run
2nd version 16 March 2016 : Document2.zip: Extracts to: XFJ1188367406.js Current Virus total detections: MALWR shows a download of what looks like Dridex from http://webmail.p55.be/v4v5g45hg.exe ( VirusTotal) No, it is Locky MALWR
17 March 2016 : Document63.zip: Extracts to: MAJ2633232008.js Current Virus total detections: MALWR shows a download of Locky ransomware from http://escortbayan.xelionphonesystem.com/wp-content/plugins/hello123/89h8btyfde445.exe ( VirusTotal)
18 March 2016: Document2.zip extracts to IDM7645168207.js ( VirusTotal) MALWR shows downloads from http://foodgrade.tk/wp-content/plugins/hello123/j7u7h54h5.exe ( locky ransomware) and http://teachersoftechnology.org/wp-content/plugins/hello123/8888ytc6r.exe ( password stealer) this site is currently not responding for me These are the same malwares as described in this post
Previous campaigns over the last few weeks have delivered 5 or 6 and quite often up to 10 or 12 different versions, . There are frequently 5 or 6 download locations sometimes delivering the exactly same malware from all locations and sometimes slightly different malware versions. Dridex /Locky / Teslacrypt 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 or Banking password stealer Trojans.
This is another one of the spoofed icon files that unless you have “show known file extensions enabled“, will look like a DOC or other normal 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. Most ( if not all) 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 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.