Continuing with the regular series of Japanese language malspam emails is today’s overnight onslaught with the subject of Express Mail Service (EMS) pretending to come from email@example.com. I am also getting a lot of emails with a malformed subject line ?iso-2022-jp?B?RU1TGyRCR1tDIz51NjckTjNORycbKEIgLSAbJEJNOUpYNkkbKEIgLSAbJEJGfEtcTTlALxsoQg==?= or ?iso-2022-jp?B?GyRCTT05cEw1JDckTk8iTW1AaEpROTkkZCUiJUklbCU5SlE5ORsoQiA=?= which I assume is an encoding error and it is probably the same subject in Japanese characters, that my mail server cannot decode properly. These currently deliver Ursnif /Gozi /Papras banking Trojan
These do not come from Japan Post but from a botnet of infected computers worldwide. Some of the spoofed sending email addresses include:
These all have random numbered zip attachments , but all extract to the same E M S ( 320950286501108 ) . PDF.exe file
They use email addresses and subjects that will entice a user to read the email and open the attachment.
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.
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.
One of the emails looks like:
Date: Thu 01/09/2016 19:22
Subject: Express Mail Service (EMS)
Attachment: E M S ( 351622889443240 ).zip
配達員が注文番号( 351622889443240 )の商品を配達するため電話で連絡を差し上げたのですが、つながりませんでした。 従ってご注文の品はターミナルに返送されました。 ご注文登録時に入力していただいた電話番号に誤りがあったことが分かりました。 このメールに添付されている委託運送状を印刷して、最寄りの郵便局 – 日本郵政取り扱い郵便局までお問い合わせください。
EMS（国際スピード郵便） – 郵便局 – 日本郵政
Translates to :
Dear Sir or Madam
The delivery member contacted me by phone to deliver the item with order number (351622889443240), but it did not connect.
So the item you ordered was returned to the terminal.
I found that there was an error in the phone number you entered when ordering.
Please print out the consignment letter attached to this e-mail and inquire at the nearest post office – Japan postal service post office.
EMS (International Speed Mail) – Post Office – Japan Post
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.
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.