How to remove the Cypress stealer from the infected machine?

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

What is Cypress?

Information stealer is a type of malware that is designed to gather login information (e.g., usernames, passwords), credit card details, bank account numbers, or other sensitive information that the attackers could monetize in one or another way.

Cypress is the name of an information stealer that targets quite a wide range of data, it is advertised as the most powerful stealer for its price. It is known that Cypress malware costs $100 and it is for sale on hacker forums. Its developers have written this stealer using the C computer programming language.

Once installed, Cypress stores its data in RAM and does not write anything to the hard drive which makes it hardly traceable.

Cypress malware

It is known that Cypress can collect data from all Chromium-based browser, it can gather login credentials (usernames, email addresses, passwords), credit card details, autofill data, browsing and download history.

Moreover, Cypress can collect data from Mozilla Firefox, Microsoft Edge, Internet Explorer browsers, Microsoft Outlook and Mozilla Thunderbird email clients, session data from Telegram, ProtonVPN, NordVPN, FileZilla clients.

Furthermore, this stealer can gather Discord, 2FA, Origin sessions, PSI and PSI + data and correspondence, Windows Store data, Total Commander and Pidgin data. Additionally, Cypress can access all the information about the computer, including list of running processes and geolocation.

All the aforementioned capabilities allow cybercriminals behind Cypress to hijack personal accounts and clients and misuse them for various malicious purposes.

For example, to make fraudulent purchases, transactions, spread this or any other malware, steal identities, send spam (including malspam, phishing emails), and so on.

Also, they may try to use stolen login credentials to hijack even more accounts that have the same login credentials, or sell gathered information to third parties (other cybercriminals).

In one way or another, Cypress is quite a powerful information stealer that can collect a variety of sensitive, confidential data. If there is any reason to suspect its presence, then this malware should be removed immediately.

Threat Summary:
Name Cypress information stealer
Threat Type Password-stealing virus, banking malware, spyware.
Detection Names Avast (Win32:Malware-gen), BitDefender (Trojan.GenericKD.45971716), ESET-NOD32 (A Variant Of Win32/Agent.ACWZ), Kaspersky (HEUR:Trojan-Spy.Win32.Stealer.gen), Microsoft (Trojan:Win32/CryptInject!MSR), Full List (VirusTotal)
Symptoms Information-stealing 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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There are many various information stealers, the main difference between them is what sensitive data they target/can collect. Most stealers target information that could be used to steal personal accounts or banking-related information.

It is important to mention that malware of this type tend to be designed to run silently in the background so that victims would not suspect its presence until it is monetized. More examples of information stealers are CopperStealer, X-FILES, and EliteStealer.

How did Cypress infiltrate my computer?

Most popular ways to proliferate malware is through Trojans, phishing emails, unreliable sources for downloading files, programs, unofficial software updaters, and illegal activation tools. Trojan is a type of malware that can be used to distribute other software of this kind by designing it to function as backdoor malware.

Once a Trojan of this type is installed on the system, then it can install its payload (e.g., ransomware). Phishing emails contain malicious files (attachments) or malicious links.

Examples of files that can be used to deliver malware via email are Microsoft Office or PDF documents, JavaScript files, archives like ZIP, RAR, executable files (.exe and other files of this kind), etc. Recipients install malware on their computers when they download and open those files.

Peer-to-Peer networks (torrent clients, eMule, etc.), unofficial pages, free file hosting, freeware download websites, various third-party downloaders, and so on - are examples of channels that cybercriminals use to distribute malware too.

They disguise malicious files as harmless, regular files and wait for someone to download and open those files in such cases. Third-party software updaters infect computers by directly installing malware or exploiting bugs, flaws of installed, outdated software.

Most unofficial software activation tools (also known as "cracking" tools) do not function as their users expect them as well. It is common that these tools are bundled with malware. Therefore, their users unknowingly allow for malware to be installed on their computers by themselves.

How to avoid installation of malware?

Download files and programs only from official, trustworthy websites use direct links. Other sources (e.g., third party downloaders, unofficial pages) for downloading files and programs can be used to proliferate malicious files, programs.

Do not open email attachments (or website links) in received irrelevant emails from unknown, suspicious senders. Update and activate installed software with tools or functions that its official software developers provide.

Never use third-party, unofficial updaters or activation tools - they can be and often are malicious. Another issue with using unofficial activation ('cracking') tools is that it is illegal. It is not legal to use pirated software too.

Additionally, scan the operating system for threats regularly and do it using 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.

Hacker forum used to promote and sell Cypress:
cypress stealer for sale on hacker forum gif

Screenshot of the website used to log into the Cypress administration panel:

cypress stealer login page for 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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