How to avoid installation of Formbook via the fake Inbank email?

Also Known As: FormBook malware
Type: Trojan
Damage level: Severe

What is Inbank email virus?

One of the most popular ways to deliver malware is to send emails disguised as letters from legitimate companies (or other entities) with malicious attachments or website links. Cybercriminals behind this malspam campaign send emails disguised as letters from Inbank containing a download link for a malicious file designed to install FormBook malware.

Inbank email virus malware-spreading email

Inbank malspam campaign in detail

The main purpose of this email is to trick recipients into believing that more than thirteen thousand euros have been sent to their bank account and clicking the PDF file logo for more detailed payment information. If clicked, that PDF logo image downloads a malicious ISO file designed to install FormBook.

FormBook is designed to steal information from installed web browsers and other programs. More precisely, it is designed to collect cookies, browsing history, Internet Protocol addresses, usernames, email addresses, passwords (or other login credentials), credit card details, and other sensitive information.

Cybercriminals behind FormBook may use gathered information to steal identities, hijack personal accounts and use them to make fraudulent purchases, transactions, trick other people into transferring money, providing personal information, and so on. Also, FormBook can operate as a keystroke logger.

Keyloggers record keyboard input - they collect information entered with a keyboard. Additionally, FormBook can be used to install additional malware (to infect computers with ransomware, Trojan, cryptocurrency miner). In one way or another, FormBook should be removed from infected computers as soon as possible.

Threat Summary:
Name FormBook malware
Threat Type Information-stealing virus, keylogger, loader
Hoax Recipients have received money to their bank accounts
Attachment(s) Inbank_pdf.iso
Detection Names (Inbank_pdf.iso) Arcabit (Trojan.Generic.D2C9B5FF), Combo Cleaner (Trojan.GenericKD.46773759), ESET-NOD32 (A Variant Of Win32/Kryptik.HMBD), Kaspersky (HEUR:Trojan-Spy.Win32.Noon.gen), Microsoft (Trojan:Win32/Lokibot.RW!MTB), Full List Of Detections (VirusTotal)
Symptoms Malicious programs like FormBook 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 FormBook
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 Combo Cleaner.
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Malspam campaigns in general

Emails used to deliver malware contain malicious attachments or links. In both cases, recipients infect their computers by downloading and opening malicious files. Usually, cybercriminals behind malspam campaigns pretend to be legitimate companies, organizations. More examples of similar emails are "Destel Group", "Assurance Certificates", "Statement Report".

How did Inbank email virus infect my computer?

The PDF logo image in this email has a hyperlink added to it. That link is designed to download a malicious ISO file (Inbank_pdf.iso). FormBook gets installed when users load that file. It is important to mention that other files can be used to distribute malware too. For example, PDF or MS Office documents, executable files (like EXE), ZIP, RAR files, JavaScript files.

Malicious documents opened with MS Office 2010 and newer versions do not install malware unless users enable editing/content (macros commands) in them. Although, malicious documents opened with older MS Office versions install malware on computers once they are opened. It is because older versions do not have the "Protected View" mode.

How to avoid installation of malware?

Files and website links in irrelevant emails sent from unknown, suspicious addresses could be malicious. Therefore, emails of this kind should be thoroughly examined before opening their contents (links, attachments). It is important to remember that malicious emails usually look like letters from legitimate entities.

Software and files should be downloaded from official websites and through direct download links. Other sources like unofficial websites, third-party downloaders, Peer-to-Peer networks, and so on can be used to distribute malware. Third-party installers can be designed to install malicious software too.

Installed programs have to be updated and activated with tools or implemented functions provided by their official developers. Third-party, unofficial tools often have malware hidden in them. Also, it is against the law to use pirated software (use cracking tools to activate legitimate software).

The operating system should be scanned for viruses and other threats regularly. It is recommended to scan it with a reputable antivirus or anti-spyware software and keep it up to date. If you've already opened Inbank email attachment, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate infiltrated malware.

Text presented in the Inbank email letter:

Subject: Inbank - Alert bonifico



Gentile stimato cliente,
confermiamo che in data 11/08/2021 alle ore 09:36 dal conto IV04V0871639150000012103788 è stato inviato un bonifico bancario per un importo di 13.734,14 euro sul tuo conto come "Fattura di Pagamento". si prega di fare riferimento al file pdf allegato per ulteriori informazioni su questo pagamento.


Consulta la pagina dedicata alle FAQ sul sito Inbank, oppure contatta la tua Filiale.


Malicious attachment ("Inbank_pdf.iso") detected as malicious in VirusTotal:

inbank email virus virustotal detections for Inbank_pdf.iso file

Instant automatic malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Combo Cleaner 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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Quick menu:

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 Combo Cleaner Antivirus 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 Combo Cleaner Antivirus for Windows.

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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.

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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.

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