Avoid infecting the system through "SD BIOSENSOR" scam emails

Also Known As: MassLogger virus
Type: Trojan
Distribution: Moderate
Damage level: Severe

"SD BIOSENSOR Email Virus" removal guide

What is "SD BIOSENSOR Email Virus"?

"SD BIOSENSOR" is yet another Coronavirus/COVID-19 themed spam campaign. The term "spam campaign" is used to define a large scale operation, during which thousands of deceptive/scam emails are sent. The letters are disguised as mail from a legitimate global bio-diagnostic company - SD BIOSENSOR. These emails are presented as important orders concerning the pandemic. However, instead of containing this information, upon opening - the attached Excel file initiates download/installation of MassLogger malware.

SD BIOSENSOR malware-spreading email spam campaign

The "SD BIOSENSOR" emails with the subject "Quotation Request ARN200618-1" (titles may vary) state that their contain an urgent Coronavirus/COVID-19 pandemic order. The letters state that the attached file is supposedly a request under the number/code ARN200618-1. Additionally, recipients are urged to inspect the equipment and products in the listed website. Recipients are told that a speedy response would be greatly appreciated. Instead of containing the aforementioned request, then attached Excel spreadsheet ("SD Technology Co. Ltd_RFQ_ARN200618-1.xlsm") is designed to infect systems with MassLogger. This piece of malicious software is designed to steal information. Following successful installation, it attempts to extract account log-in credentials (e.g. usernames and passwords) from certain browsers, communication apps / messengers, as well as email, VPN (Virtual Private Network) and FTP (File Transfer Protocol) clients. Furthermore, MassLogger has keylogging abilities. In other words, this malicious program can record key strokes. This functionality can also be used to steal victim's accounts and other sensitive typed information. Cyber criminals typically target email, social media, social networking, messaging, data storage, file sharing, e-commerce, online money transferring, cryptocurrency wallets (cryptowallets), banking and other accounts. To summarize, trusting the fake "SD BIOSENSOR" emails can result in system infections, financial losses, severe privacy issues and identity theft. If it is suspected or known that MassLogger (or other malware) has already infected the system - anti-virus software must be used to remove it immediately.

Threat Summary:
Name MassLogger virus
Threat Type Trojan, password-stealing virus, banking malware, spyware.
Hoax Emails are disguised as Coronavirus/COVID-19 pandemic orders
Attachment(s) SD Technology Co. Ltd_RFQ_ARN200618-1.xlsm
Detection Names Avast (Script:SNH-gen [Trj]), BitDefender (Trojan.GenericKD.34066374), ESET-NOD32 (VBA/TrojanDropper.Agent.BHD), Kaspersky (HEUR:Exploit.MSOffice.CVE-2017-11882.), Full List Of Detections (VirusTotal)
Symptoms Trojans are designed to stealthily infiltrate the victim's computer and remain silent, and thus no particular symptoms are clearly visible on an infected machine.
Payload MassLogger
Distribution methods Infected email attachments, malicious online advertisements, social engineering, software 'cracks'.
Damage Stolen passwords and banking information, identity theft, the victim's computer added to a botnet.
Malware Removal (Windows)

To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Malwarebytes.
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"Secure Parking", "Audit and Assurance", "BOTAS" are a few examples of other malware-proliferating spam campaigns, and "Institut za zdravstvo Srbije", "U.S Department of Labor", "COVID-19 test" are some Coronavirus/COVID-19 centered spam campaigns. The deceptive emails distributed through these operations are usually presented as "official", "urgent", "priority" and similar. Much like the "SD BIOSENSOR" emails, scam letters can be disguised as mail from genuine institutions, organizations, companies, service providers, etc. However, distribution of malicious programs is not the sole purpose of such emails - they can also be used for phishing and other scams. Regardless of what this mail claims, offers, requests or demands, the end-goal is the same - to generate revenue to the scammers / cyber criminals behind it.

How did "SD BIOSENSOR Email Virus" infect my computer?

System infections are caused through virulent files, sent via spam campaigns. The files can be attached to the emails or alternatively, the letters can contain download links of malicious content. Infectious files can be in various formats (e.g. archives, executables, PDF and Microsoft Office documents, JavaScript, etc.); when they are executed, run or otherwise opened - the infection process/chain (i.e. malware download/installation) is initiated. For example, Microsoft Office documents infect systems by executing malicious macro commands. In MS Office versions released before 2010 - the infection process begins when the file is opened. However, the newer versions have "Protected View" mode that prevents macros from being executed automatically. Instead, users are asked to enable macro commands (i.e. to enable editing/content); hence, malware download/installation is triggered only if macros are enabled manually.

How to avoid installation of malware?

It is strongly advised not to open suspect and/or irrelevant emails, especially any attachments or links present in them. Additionally, it is recommended to only use Microsoft Office versions released after 2010. However, malicious programs are not proliferated exclusively through spam campaigns. Other popular distribution methods include - untrustworthy download channels (e.g. unofficial and free file-hosting websites, Peer-to-Peer sharing networks and other third party downloaders), illegal activation tools ("cracks") and illegitimate updaters. Therefore, it is important to only use official/verified download sources, activate and update software with tools/functions provided by legitimate developers. To ensure device and user safety, it is paramount to have a dependable anti-virus software installed. It must be keep updated, used to run regular system scans and to remove detected threats/issues. If you've already opened "SD BIOSENSOR Email Virus" attachment, we recommend running a scan with Malwarebytes for Windows to automatically eliminate infiltrated malware.

Text presented in the "SD BIOSENSOR" email letter:

Subject: Quotation Request ARN200618-1


Dear Sirs,


This is an urgent COVID-19 order.


Please find attached request no. ARN200618-1, equipment and products respectively as inspected on your website -.


Your prompt response will be highly appreciated.

Best regards,


Malicious attachment distributed via "SD BIOSENSOR" spam campaign ("SD Technology Co. Ltd_RFQ_ARN200618-1.xlsm"):

Malicious attachment distributed through SD BIOSENSOR spam campaign (SD Technology Co. Ltd_RFQ_ARN200618-1.xlsm)

Instant automatic malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Malwarebytes is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
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How to remove malware manually?

Manual malware removal is a complicated task - usually it is best to allow antivirus or anti-malware programs to do this automatically. To remove this malware we recommend using Malwarebytes for Windows. If you wish to remove malware manually, the first step is to identify the name of the malware that you are trying to remove. Here is an example of a suspicious program running on a user's computer:

malicious process running on user's computer sample

If you checked the list of programs running on your computer, for example, using task manager, and identified a program that looks suspicious, you should continue with these steps:

manual malware removal step 1Download a program called Autoruns. This program shows auto-start applications, Registry, and file system locations:

screenshot of autoruns application

manual malware removal step 2Restart your computer into Safe Mode:

Windows XP and Windows 7 users: Start your computer in Safe Mode. Click Start, click Shut Down, click Restart, click OK. During your computer start process, press the F8 key on your keyboard multiple times until you see the Windows Advanced Option menu, and then select Safe Mode with Networking from the list.

Safe Mode with Networking

Video showing how to start Windows 7 in "Safe Mode with Networking":

Windows 8 users: Start Windows 8 is Safe Mode with Networking - Go to Windows 8 Start Screen, type Advanced, in the search results select Settings. Click Advanced startup options, in the opened "General PC Settings" window, select Advanced startup. Click the "Restart now" button. Your computer will now restart into the "Advanced Startup options menu". Click the "Troubleshoot" button, and then click the "Advanced options" button. In the advanced option screen, click "Startup settings". Click the "Restart" button. Your PC will restart into the Startup Settings screen. Press F5 to boot in Safe Mode with Networking.

Windows 8 Safe Mode with networking

Video showing how to start Windows 8 in "Safe Mode with Networking":

Windows 10 users: Click the Windows logo and select the Power icon. In the opened menu click "Restart" while holding "Shift" button on your keyboard. In the "choose an option" window click on the "Troubleshoot", next select "Advanced options". In the advanced options menu select "Startup Settings" and click on the "Restart" button. In the following window you should click the "F5" button on your keyboard. This will restart your operating system in safe mode with networking.

windows 10 safe mode with networking

Video showing how to start Windows 10 in "Safe Mode with Networking":


manual malware removal step 3Extract the downloaded archive and run the Autoruns.exe file.

extract autoruns.zip and run autoruns.exe

manual malware removal step 4In the Autoruns application, click "Options" at the top and uncheck "Hide Empty Locations" and "Hide Windows Entries" options. After this procedure, click the "Refresh" icon.

Click 'Options' at the top and uncheck 'Hide Empty Locations' and 'Hide Windows Entries' options

manual malware removal step 5Check the list provided by the Autoruns application and locate the malware file that you want to eliminate.

You should write down its full path and name. Note that some malware hides process names under legitimate Windows process names. At this stage, it is very important to avoid removing system files. After you locate the suspicious program you wish to remove, right click your mouse over its name and choose "Delete".

locate the malware file you want to remove

After removing the malware through the Autoruns application (this ensures that the malware will not run automatically on the next system startup), you should search for the malware name on your computer. Be sure to enable hidden files and folders before proceeding. If you find the filename of the malware, be sure to remove it.

searching for malware file on your computer

Reboot your computer in normal mode. Following these steps should remove any malware from your computer. Note that manual threat removal requires advanced computer skills. If you do not have these skills, leave malware removal to antivirus and anti-malware programs. These steps might not work with advanced malware infections. As always it is best to prevent infection than try to remove malware later. To keep your computer safe, install the latest operating system updates and use antivirus software.

To be sure your computer is free of malware infections, we recommend scanning it with Malwarebytes for Windows.

About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

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Malware activity

Global malware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

QR Code
MassLogger virus QR code
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