{"id":10831,"date":"2022-04-12T05:54:11","date_gmt":"2022-04-12T05:54:11","guid":{"rendered":"https:\/\/myonlinesecurity.co.uk\/?p=10831"},"modified":"2023-04-03T10:25:02","modified_gmt":"2023-04-03T10:25:02","slug":"fake-telstra-bill-malspam-delivers-trickbot-banking-trojan-via-multi-stage-download","status":"publish","type":"page","link":"https:\/\/myonlinesecurity.co.uk\/fake-telstra-bill-malspam-delivers-trickbot-banking-trojan-via-multi-stage-download\/","title":{"rendered":"Fake Telstra Bill Malspam Delivers Trickbot Banking Trojan Via Multi Stage Download"},"content":{"rendered":"
Another Trickbot campaign overnight last night UK time. Pretends to be a bill coming from notifications@in.telstra.com.au. These have a slightly devious download mechanism. You get a wsf file in zip to start with. That has a hardcoded single site in the file. That downloads a .js file which has 4 or sometimes 5 hardcoded urls which download an encrypted txt file that is converted by the js file to a working Trickbot binary. The name & reference number in the email is random<\/p>\n
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.<\/p>\n
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.<\/p>\n
This is another one of the files that unless you have \u201cshow known file extensions enabled\u201c, 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.<\/p>\n
May-July2017.zip : Extracts to: QPX_ 18941124638_411385.wsf Current Virus total detections: Payload Security downloads from dodawanie.com\/?1 ( or one of the other stage 2 sites listed in this pastebin ( VirusTotal) ( Payload Security) which cannot examine the file because it is seen as txt. However that downloads of an encrypted file from one of the stage 3 sites listed in this pastebin report which is converted by the script to a .exe file ( VirusTotal) ( payload Security)<\/p>\n
One of the emails looks like:<\/p>\n
From:<\/strong> notifications@in.telstra.com.au<\/p>\n Date:<\/strong> Tue 25\/07\/2017 23:27<\/p>\n Subject:<\/strong> < No Subject ><\/p>\n Attachment<\/strong>: May-July2017.zip<\/p>\n Good Day,\u00a0<\/em><\/p>\n Please see attached email bill request from May-July 2017.\u00a0<\/em><\/p>\n Yours Sincerely,<\/em><\/p>\n Lorraine<\/em><\/p>\n D354810<\/em><\/p><\/blockquote>\n 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.<\/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. 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.Body Content<\/strong>:<\/h3>\n
Screenshot<\/strong>:<\/h3>\n
\nThe 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