Continuing with the never ending series of malware downloaders is a Japanese language malspam email with the subject of 予約完了[るるぶトラベル] (Reservation complete [Ruu Travel]) pretending to come from firstname.lastname@example.org with a zip attachment with a Japanese character set name which delivers ursnif / Gozi / ISFB banking Trojan. We are also seeing these with alternative subjects and body content faking invoices coming from random Japanese email addresses
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.
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.
Other file names include:
One of the emails looks like:
Date: Mon 15/05/2017 09:06
Subject: 予約完了[るるぶトラベル] (Reservation complete [Ruu Travel] )
Attachment: 予約_消費税込_サービス料込_.zip translates to (Reservation _ consumption tax included _ Service charge included _.zip)
※本メールは、自動的に配信しています。直接ご返信いただいてもお問い合わせにはお答えできませんので、あらかじめご了承ください。-----------------------------------------------------------------------ご予約いただきありがとうございます。ご予約を下記の内容で承りましたのでご確認下さい。＜＜ご予約内容・注意事項＞＞受付日時：2017/05/15受付番号：118964500ご宿泊日：2017年5月20日(水)より1泊人数・部屋数：2名・1室到着予定時刻：17:00【禁煙】食事条件：1泊朝食部屋条件：32平米 36.50平米利用交通機関：車駐車場あり 屋外広場 無料 60台（乗用車）
※ This e-mail is delivered automatically.
Even if you reply directly, we can not reply to inquiries,
Thank you for your reservation.
Please confirm that you received the reservation with the following contents.
<< Reservation details and notes >>
Reception date: 2017/05/15
Receipt number: 118964500
Date of stay: One night from Wednesday, May 20, 2017
Number of people · Number of rooms: 2 people · 1 room
Estimated arrival time: 17: 00
Meal conditions: 1 night breakfast
Room Condition: 32 square meters 36.50 square meters
Used Transportation: Car
Parking lot Outdoor open space Free 60 (passenger car)
We are also seeing these with alternative subjects and body content faking invoices
One of the emails looks like:
Date: Mon 15/05/2017 09:21
Subject: 【017/05】請求額のご連絡 ( [017/05] Notification of invoice amount)
【ご請求額の通知 】━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ いつもお世話になっております。前月のご請求額が確定いたしましたのでお知らせいたします。請求書、および明細をPDF形式の添付書類にてお送りいたしますので、ご確認ください。 なお、設定漏れによるノーショー、キャンセルのご予約は請求対象となっております。あらかじめご了承ください。 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━◆ ご請求額━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 2017年04月分 5,379円（税込） 請求書、および明細は添付書類をご確認ください。
【Notification of invoice amount】
Always I am indebted.
We are pleased to inform you that the invoice amount of the previous month has been finalized.
We will send invoice and detailed statement in PDF format attached document,
In addition, reservation of no-show, cancellation due to omission of setting is subject to billing
And we are. Please note.
◆ Claim amount
April 2017 5,379 yen (tax included)
Please check the attached document, the invoice, and the details.
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.
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.