Fake Payment receipt vbs drops njrat bladabindi downloads Agent Tesla via Sendspace.

A rather interesting malware campaign from overnight. It all starts with an email pretending to be a payment receipt that contains a .tar attachment which contains a vbs file.

As per usual the email is just generic enough to entice a recipient to open it, read it & possibly extract & run the malware file.

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/vbs  file it really is, so making it much more likely for you to accidentally open it and be infected.

This vbs is quite difficult for me to manually analyse, it seems to be encoded with a little endian UTF 16 encoding which probably means that the miscreant is using a computer with a non English language set up so when the file is opened in notepad it has scrambled Chinese style characters. Anyrun can run it quite well but it crashed part way through using Windows 7 but ran successfully using Windows 10. This VBS drops a small .exe file which renames itself & copies itself to multiple locations on the victim’s computer as SYSTEM.EXE  or SYSTEM.EXE.exe. This is the NJRat / Bladabindi backdoor/downloader.

This eventually downloads Agent Tesla Keylogger from  Sendspace large file transfer service. ( it has been reported to Sendspace). It looks like this Agent Tesla version is exfiltrating data via SMTP using mail.rew.com.my. This looks like the email account is based on server103.verygoodserver.com. I cannot see what the miscreant’s email address is because they are using end to end encryption which masks the actual email address. Only the server is listed in plain text.

PaymentCopy.tar : Extracts to:   PaymentCopy.vbs            Current Virus total detections:  Anyrun W7 | W10 |

This malware vbs drops q3iDe3.exe   (VirusTotal)  which downloads the Agent Tesla from https://fs06n3.sendspace.com/dl/e0f98fa2fea205a558c4c78a1d072ef9/5cca5a494f70a851/db7h3m/programmingeds.exe ( VirusTotal File) Anyrun |

You can now submit suspicious sites, emails and files via our Submissions system

One of the  emails looks like:

From:  Sales Manager <This email address is being protected from spambots. You need JavaScript enabled to view it.>

Date: Wed 01/05/2019 21:31

Subject:  Payment receipt

Attachment: PaymentCopy.tar

Body content:

Good Day

Please see attached Payment receipt .

Please inform me when order would be shipped and when you get payment.

Waiting for your update on our order.

Best regards,

Katharina George

Sales Manager

Druparma Imp. & Exp. Co., Ltd

Anton-druparma-Str. 1-3

P.O. Box 11 04 54

83004 Rosenheim, Germany

Screenshot:

Fake Payment receipt email

Fake Payment receipt email

Email Headers:

IP Hostname City Region Country Organisation
129.232.250.51  outgoing22.jnb.host-h.net ZA AS37153 HETZNER (Pty) Ltd
129.232.136.57  www500.jnb1.host-h.net ZA AS37153 HETZNER (Pty) Ltd
52.229.124.78  Mistissini Quebec CA AS8075 Microsoft Corporation

 

Received: from outgoing22.jnb.host-h.net ([129.232.250.51]:57731)
	by my email server with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256)
	(Exim 4.91)
	(envelope-from <This email address is being protected from spambots. You need JavaScript enabled to view it.>)
	id 1hLyB3-00056f-WC
	for This email address is being protected from spambots. You need JavaScript enabled to view it.; Wed, 01 May 2019 23:58:14 +0100
Received: from www500.jnb1.host-h.net ([129.232.136.57])
	by antispam5-jnb1.host-h.net with esmtpsa (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128)
	(Exim 4.89)
	(envelope-from <This email address is being protected from spambots. You need JavaScript enabled to view it.>)
	id 1hLyA7-00049H-HV; Thu, 02 May 2019 00:57:41 +0200
Received: from [52.229.124.78] (helo=ariadnebo7.qnd5bbjdbabuvh3fr5pjcctued.vx.internal.cloudapp.net)
	by www500.jnb1.host-h.net with esmtpa (Exim 4.84_2)
	(envelope-from <This email address is being protected from spambots. You need JavaScript enabled to view it.>)
	id 1hLvsJ-0003nz-KN; Wed, 01 May 2019 22:30:43 +0200
Content-Type: multipart/mixed; boundary="===============0211724741=="
MIME-Version: 1.0
Subject: Payment receipt
To: info <This email address is being protected from spambots. You need JavaScript enabled to view it.>
From: "Sales Manager" <This email address is being protected from spambots. You need JavaScript enabled to view it.>
Date: Wed, 01 May 2019 16:30:31 -0400
Message-Id: <This email address is being protected from spambots. You need JavaScript enabled to view it.>
X-Authenticated-Sender: This email address is being protected from spambots. You need JavaScript enabled to view it.
X-Virus-Scanned: Clear (ClamAV 0.100.3/25436/Wed May  1 09:58:19 2019)
X-Originating-IP: 129.232.136.57
X-SpamExperts-Domain: powerbit.co.za
X-SpamExperts-Username: 
Authentication-Results: host-h.net; auth=pass (login) smtp.auth=@powerbit.co.za
X-SpamExperts-Outgoing-Class: unsure
X-SpamExperts-Outgoing-Evidence: Combined (0.70)
X-Recommended-Action: accept
X-Filter-ID: Mvzo4OR0dZXEDF/gcnlw0R4iIUvzjp5U0k+OHPPhRGapSDasLI4SayDByyq9LIhVqQXi2egnwDul
 13g0yCi78UTNWdUk1Ol2OGx3IfrIJKyP9eGNFz9TW9u+Jt8z2T3K61J+EpvYL0Cfd03idLRmTuIK
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X-Report-Abuse-To: This email address is being protected from spambots. You need JavaScript enabled to view it.

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, 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.  

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.

 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.

:

IOC:

Main object- “PaymentCopy.vbs”sha256 e0f2b44a4a0c6bea83bdfa50d68b5ba86f05344e76d8490ca2dc05658cd1644asha1 dda65565e60c5edcaa0d4590b21b973594d9f547md5 8e6b45126f40fbd9df29df12fae8884cDropped executable filesha256 C:\Users\admin\AppData\Roaming\q3iDe3.exe cc97e8a3a8b297926e4fb1f3deaed9c0e9370d7332d15ea256463b376685fae6MD5 8fd363f923023c3a051ec699f0c95d6cSHA-1 8733921dac1001948fbfe8d0cbc621149688fe34sha256 C:\Users\admin\AppData\Local\Temp\orceokrkk-.exe dc93986559e1ef6a919d709d4485be10822f9fa0324ff12573c8314f2acd682eDNS requestsdomain fs06n3.sendspace.comdomain checkip.amazonaws.comConnectionsip 45.124.54.94ip 52.200.125.74ip 69.31.136.29HTTP/HTTPS requestsurl https://fs06n3.sendspace.com/dl/e0f98fa2fea205a558c4c78a1d072ef9/5cca5a494f70a851/db7h3m/programmingeds.exeurl http://checkip.amazonaws.com/

Main object- “programmingeds (1).exe”sha256 dc93986559e1ef6a919d709d4485be10822f9fa0324ff12573c8314f2acd682esha1 23081646862dac88b4eb7994e1d0587da83a9d5amd5 560973435025c19ee7aad9fb202eb16bDNS requestsdomain mail.rew.com.myserver103.verygoodserver.comdomain checkip.amazonaws.comConnectionsip 192.35.177.64ip 179.61.192.12ip 34.233.102.38HTTP/HTTPS requestsurl http://checkip.amazonaws.com/

Read more https://myonlinesecurity.co.uk/fake-payment-receipt-vbs-drops-njrat-bladabindi-downloads-agent-tesla-via-sendspace/

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