How to uninstall the Alfonso stealer?

Also Known As: Alfonso information stealer
Type: Trojan
Damage level: Severe

What is Alfonso?

Alfonso (also known as Al'fon$o) is the name of an information stealer that cyber criminals are selling on hacker forums. Typically, malware of this type targets credit card details, passwords and other sensitive information and runs silently in the system background.

Alfonso malware

Alfonso stealer collects data such as passwords, credit card details, autofill forms, download and browsing history, cookies from all Chromium-based and Yandex browsers. Also, it collects cryptocurrency wallets. Cyber criminals could use collected data to steal personal accounts, identities, make fraudulent purchases, transactions, and for other malicious purposes.

Also, they could use stolen accounts to trick other people into installing malware on their computers (including the Alfonso stealer), making money transactions, etc. Alfonso stores collected information on its administration panel, it allows cyber criminals to download or delete logs from it.

Threat Summary:
Name Alfonso information stealer
Threat Type Information stealer
Detection Names Avast (Win32:PWSX-gen [Trj]), BitDefender (Gen:Variant.Zusy.329313), ESET-NOD32 (A Variant Of Win32/PSW.Agent.OKX), Kaspersky (HEUR:Trojan-Spy.Win32.Stealer.vho), Microsoft (Trojan:Win32/CryptInject!ml), 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)

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There are many various information stealers, usually their developers either use their stealers themselves or they sell them to third parties (other cyber criminals).

In most cases malware like Alfonso collects sensitive information, however, sometimes it can have additional features that would allow cyber criminals to access victim's microphone, camera, download files, and/or perform other tasks. A couple of examples of other data stealing malware are Hunter, Xenon and RedLine.

How did Alfonso infiltrate my computer?

Typically, users infect their computers with malware via malspam campaigns, unofficial software activation ('cracking) tools, fake software updaters, unreliable file, software download sources or certain Trojans. Malspam emails are used to trick recipients into installing malware via malicious attachments or website links in them.

Recipients install malware when they download and execute a file that they have received via email. Some examples of files that can be used to distribute malware via email are malicious Microsoft Office documents, executable files (like .exe), JavaScript files, PDF documents, archive files (like ZIP, RAR).

Software 'cracking' tools are illegal tools that activate licensed software for free. However, it is common that when such tools are used to bypass software activation they install infect computers with malware instead.

Fake software updating tools do not fix, update any installed software and install some malware instead, or they infect computers by exploiting bugs, flaws of installed software that is out of date.

Third party downloaders, unofficial websites, Peer-to-Peer networks (like torrent clients, eMule), freeware download sites, free file hosting pages, etc., are examples of unreliable download sources. It is common that they are used to trick users into downloading malicious files by disguising those files as legitimate, regular.

Users cause installation of malware by executing those files. Trojans are malicious programs that can be designed to cause chain infections. In other words, to install additional malware. It is common that they are disguised as legitimate programs, in other words, users install them unknowingly.

How to avoid installation of malware?

Website links and attachments in irrelevant emails that are sent from unknown, suspicious addresses should not be opened, especially emails of this kind are irrelevant. Software, files should be downloaded from official sites and via direct download links. Other sources, tools like third party downloaders, Peer-to-Peer networks, unofficial sites, etc., should not be used.

Third party installers should not be used too. When already installed software (and the operating system) needs to be updated, it should be achieved by using tools and/or implemented functions from its official developers. Third party, unofficial tools should never be used for that.

Not only because they can be designed to install malware, but also because it is not legal to use unofficial activation tools to activate licensed software. Additionally, it is advised to scan the operating system for threats regularly and do that with a 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.

Screenshot of the hacker forum where cyber criminals promote Alfonso:

alfonso stealer image used for promotion

Alfonso's administration panel:

alfonso stealer administration panel

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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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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