How to remove the Javali banking trojan?

Also Known As: Javali (Ousaban) banking malware
Type: Trojan
Distribution: Low
Damage level: Severe

Javali banking trojan removal guide

What is Javali?

Banking trojans are malicious programs that, once installed on the victim's computer, create botnets, steal credentials, inject malicious code into web browsers, or steal money. Javali (also known as Ousaban) is a banking trojan targeting users of financial institutions living in Latin America. Research shows that this trojan is distributed using malicious links and attachments in malspam emails. If there is any reason to believe that Javali trojan is installed o the operating system, then it should be removed as soon as possible.

Javali malware

It is known that this banking trojan targets users of Bittrex (a cryptocurrency website) and Mercado Pago (a digital payment platforms). However, it is very likely that it targets users of other payment solutions, cryptocurrency sites, etc., as well. Javali steals login credentials from websites opened with Mozilla Firefox, Google Chrome, Internet Explorer and Microsoft Edge and from opened banking (financial) application. Cybercriminals behind Javali attempt to steal personal information (usernames, email addresses, passwords or other login credentials) that they could use to hijack accounts and then misuse those accounts to make fraudulent purchases, transactions. It is important to mention that instead of using stolen accounts by themselves, cybercriminals could sell them to third parties (other cybercriminals). In one way or another, users who would have their computers infected with the Javali banking trojan are most likely to suffer monetary loss. However, if cyber criminals would successfully hijack other accounts (e.g., email, social media accounts) using the obtained credentials, then they could cause even more damage. It is noteworthy that there are users who use the same credentials for multiple accounts and crooks tend to take advantage of it.

Threat Summary:
Name Javali (Ousaban) banking malware
Threat Type Trojan, password-stealing virus, banking malware, spyware.
Detection Names Avast (Win32:Trojan-gen), BitDefender (Gen:Variant.Zusy.357421), ESET-NOD32 (A Variant Of Win32/Spy.Ousaban.B), Kaspersky (HEUR:Trojan-Banker.Win32.Javali.gen), Symantec (Trojan.Gen.MBT), Full List (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.
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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More examples of banking trojans are Ursnif, Mekotio, ZeuS Panda and Dridex. As mentioned in the first paragraph, malware of this type can be designed and used to inject code into browsers, steal money and credentials, and create botnets. It is common that such trojans are designed to run silently in the background, which means there is a high chance that most victims might not be aware that their computer is infected with a banking trojan until it is too late. It is known that this particular banking trojan (Javali) is delivered using malspam.

How did Javali infiltrate my computer?

Research shows that to distribute Javali cyber criminals send emails that contain a malicious Microsoft Installer (MSI) file with an embedded Visual Basic Script that connects to a remote server (C2) and retrieves an archive file package (ZIP) that contains several files, including a malicious payload that steals financial information (login credentials from cryptocurrency sites and banking apps) from victims. It is important to mention that malspam emails can contain malicious files of other types, such as Microsoft Office documents, PDF documents, JavaScript files, archive files (like ZIP, RAR), as well. Also, it is common for such emails to be disguised as important, official letters from legitimate, well known organizations, companies, or other entities. Either way, the main purpose of malspam is to trick a recipient into downloading and opening a malicious file that is designed to infect a computer with malware.

How to avoid installation of malware?

Any software (especially if it is free) should be downloaded using reliable sources, such as official pages and direct links. Examples of unreliable sources, tools for downloading (and installing) software are third party downloaders (and installers), Peer-to-Peer networks like torrent clients, eMule. Furthermore, received irrelevant emails that are sent from unknown, suspicious addresses and contain attachments or links should not be trusted. It is common for such emails to contain malicious links or files. Installed software has to be activated and updated using tools or functions from official developers, and never with third party, unofficial activation or updating tools. Such tools can contain malware and it is not legal to use them to activate licensed software. And lastly, any computer should be scanned for threats regularly, it is advisable to do it using an up-do-date and reputable antivirus or anti-spyware software. If you believe that your computer is already infected, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate infiltrated malware.

Malspam email used to distribute Javali:

Malspam email distributing Javali malware

Text in this email:

Subject: NF-e - Segue Nota Fiscal Eletronica - Protocolo: 853183

Envio Automático de
Nota Fiscal Eletrônica - NFe

Você está recebendo em anexo o arquivo XML referente a uma Nota Fiscal Eletrônica.

Exibir detalhes da NF-e

Esse é um e-mail automático. Não é necessário respondê-lo.
Em caso de dúvidas, entre em contacto diretamente com o Emitente da NFe.

Another spam email spreading Javali (Ousaban) malware:

Spam email spreading Javali (Ousaban) trojan

Text presented within:

Subject: Retirada Obrigatoria baixe seu codigo.



Atenção foram realizadas 3 tentativas frustradas de entrega no seu endereço.

OCORRÊNCIA: Ausência de destinatário.
STATUS: Aguardando retirada.

No link abaixo esta a notificação estamos encaminhando o formulário de autorização de retirada de objeto devolvido que deve ser impresso, e apresentado obrigatóriamente na Agência dos Correios ou franqueada dos Correios mais próxima.
Lembramos que o prazo é de 7 dias úteis.

São efetuadas 3 tentativas de entrega, sendo a primeira no mesmo dia da chegada do objeto na unidade de distribuição. A segunda e a terceira tentativa são realizadas nos dias úteis subseqüentes. Caso as 3 tentativas de entrega sejam frustradas, o objeto ficará disponível para retirada pelo prazo de 7 dias corridos, após os 7 dias o objeto será encaminhado ao seu remetente de origem.

Segue em anexo seu código de autorização de retirada.
E so baixar e gerar.

Política de Privacidade - © Copyright 2019 - Correios - Central de Atendimento

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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 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.

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
Javali (Ousaban) banking malware QR code
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