Home > Trojan > Flow Crypter 4 Virus — How to Detect and Remove It from Your Computer

Flow Crypter 4 Virus — How to Detect and Remove It from Your Computer

The Flow Crypter 4 virus is a dangerous malware instance that is currently being sold on the underground hacker markets. As a result of the virus infections the hacker controllers can sabotage the victim’s data. Flow Crypter’s main purpose is to encrypt the files on the victim PC, leaving behind a custom file extension and a ransom note, asking victims to pay a hefty ransom to get the files to work again. If your computer has been infected by one of the variants of Flow Crypter 4, please read this article as it aims to help you learn how you can remove Flow Crypter 4 from your computer and how you can try and restore files, encrypted by it.

Threat Summary

Name Flow Crypter 4
Type Advanced Malware, Trojan, Ransomware
Short Description The malware can enable the hacker operators to access the whole computer, spy on the victims and encrypt sensitive user data.
Symptoms In most cases the victims are not aware of the infections.
Distribution Method The attacks can be caused by software vulnerabilities, interaction with malware emails or sites.
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User Experience Join Our Forum to Discuss Flow Crypter 4.
Data Recovery Tool Windows Data Recovery by Stellar Phoenix Notice! This product scans your drive sectors to recover lost files and it may not recover 100% of the encrypted files, but only few of them, depending on the situation and whether or not you have reformatted your drive.

Flow Crypter 4 Virus – Methods of Distribution

The Flow Crypter 4 virus is a dangerous new malware that can be distributed using different tactics. Depending on the targets the hacker operators can choose the most appropriate strategy. In most cases this means that the malware code is delivered in a script or a file that is sent to the victims.

A common method is the coordination of email spam messages that utilize various social engineering tricks. There are two main types that are usually deployed:

  • Malware Attachments — The hackers send out the files directly to the messages by posing as legitimate software. The body contents may contain elaborate descriptions in order to manipulate the users into interacting with the malware component.
  • Hyperlinks — Malware links that lead to offsite hosted instances of the Flow Crypter 4 virus.

In a similar way the criminal controllers can also use two other methods. The first type is the use of infected documents that contain dangerous cripts. The hackers mask them as containing information of user interest and can be of different types: rich text documents, spreadsheets and presentations. Once the files are opened by the victims they will be shown a notification message that asks them to enable the built-in commands. If this is done the virus infection will follow.

The other strategy is to bundle the code into software installers that are distributed on fake download portals and through email messages. In certain situations the victims may be able to evade the infections by unchecking certain options during the installation process.

Practically all malware samples can also be distributed on file sharing networks like BitTorrent or fake download portals.

The Flow Crypter 4 virus can also be distributed using plugins like browser hijackers. They are usually made compatible with the most popular web browsers: Mozilla Firefox, Safari, Opera, Microsoft Edge, Google Chrome and Internet Explorer. Usually they are distributed on the official browser extension repositories using fake software developer credentials and user reviews.

Of course just like any other advanced malware the hackers can attempt to direct vulnerability testing against the intended victims. This is done by using attack frameworks that are loaded with specific software exploits. If the target devices are found to be vulnerable the virus will be automatically loaded into the compromised host.

Flow Crypter 4 Virus – In-Depth Analysis

Once the Flow Crypter 4 virus infections have been initiated a complex behavior pattern is executed. The main malware engine has been identified to follow a several step process that uses different components to initiate the various steps. The first and most important of all is the stealth protection which is among the first to be launched. It is able to scan for any running anti-virus solutions, as well as sandbox and debugging environments. The list of affected software also includes virtual machines and system software that may interfere with its execution. The malware engine can automatically bypass the engines or altogether remove them. The hacker operators can also instruct the virus samples to remove themselves to avoid detection. The developers of the Flow Crypter 4 virus list that the following products can be bypassed by the engine:

Ad-Aware Pro, AhnLab V3 Internet Security, Arcavir Antivirus 2014, avast! Internet Security,
AVG Anti-Virus, Avira Antivirus Suite, Bitdefender Antivirus Plus, Clam AntiVirus, COMODO Internet Security,
Emsisoft Anti-Malware, eScan Antivirus, ESET NOD32 Antivirus, F-PROT Antivirus for Windows, F-Secure Internet Security 2014,
G Data AntiVirus, IKARUS anti virus, Jiangmin Antivirus 2011, K7 UltimaSecurity, Kaspersky Anti-Virus, Malwarebyes Anti-Malware,
McAfee Viruscan Enterprise, Nano Antivirus, Outpost Antivirus Pro, Panda Global Protection 2014, Quick Heal Internet Security,
Solo Antivirus, Sophos Anti-Virus, SUPERAntiSpyware, Symantec Endpoint Protection,
TOtal Defence Anti-Virus 2011, Trend Micro Titanium IS, TrustPost Antivirus, Twister Antivirus, VBA32 Anti-Virus,
VirIT eXplorer, Windows Defender, Zillya! Internet Security,

Once this has been done the malware engine can utilize several different types of injection types:

  • Windows Registry — By infecting the Windows registry the Flow Crypter 4 virus sample can cause other applications or operating system services to stop working.
  • Itself — The application can be loaded as a separate running process with adminsitrative privileges that can spawn many of its own iterations. Such behavior can make it very difficult for the users to recover their systems.
  • Svchost — This is a system processs. This type of infections makes it very difficult to detect the virus instances.
  • VBC — Such infections rely on scripts that can execute a chain of commands.
  • winlogon — By injecting itself to the winlogon service the Flow Crypter 4 virus can modify the boot options. As a result the victims may be unable the start the recovery option of the operating system.

Once the virus has infected appropriately the host it can be programmed to cause a wide variety of malicious actions. The hacker controllers can change the icons of target data or bulk rename or delete them.

The main goal of the virus is to allow the hackers to encrypt user files in a way similar to ransomware components. However in comparison to them the malware operators may not deliver ransom notes with the intent of blackmailing the victims. Instead the hackers focus on sabotage and further network infections. They can choose different encryption methods in order to achieve the maximum amount of damage.

At the moment there are several subscription Flow Crypter 4 virus packages that buyers can choose:

  • Silver Package — 1 Month for $25
  • Bronze Package — 3 Months for $45
  • Gold Package — 6 Months for $70
  • Platinum Package — Lifetime access for $100

Remove Flow Crypter 4 Virus and Restore Affected Files

If your computer got infected with the Flow Crypter 4 Virus virus, you should have a bit of experience in removing malware. You should get rid of this Virus as quickly as possible before it can have the chance to spread further and infect other computers. You should remove the Virus and follow the step-by-step instructions guide provided below.

Martin Beltov

Martin graduated with a degree in Publishing from Sofia University. As a cyber security enthusiast he enjoys writing about the latest threats and mechanisms of intrusion.

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Preparation before removing Flow Crypter 4.

Before starting the actual removal process, we recommend that you do the following preparation steps.

  • Make sure you have these instructions always open and in front of your eyes.
  • Do a backup of all of your files, even if they could be damaged. You should back up your data with a cloud backup solution and insure your files against any type of loss, even from the most severe threats.
  • Be patient as this could take a while.
  • Scan for Malware
  • Fix Registries
  • Remove Virus Files

Step 1: Scan for Flow Crypter 4 with SpyHunter Anti-Malware Tool

1. Click on the "Download" button to proceed to SpyHunter's download page.

It is recommended to run a scan before purchasing the full version of the software to make sure that the current version of the malware can be detected by SpyHunter. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria.

2. After you have installed SpyHunter, wait for it to update automatically.

SpyHunter 5 Scan Step 1

3. After the update process has finished, click on the 'Malware/PC Scan' tab. A new window will appear. Click on 'Start Scan'.

SpyHunter 5 Scan Step 2

4. After SpyHunter has finished scanning your PC for any files of the associated threat and found them, you can try to get them removed automatically and permanently by clicking on the 'Next' button.

SpyHunter 5 Scan Step 3

If any threats have been removed, it is highly recommended to restart your PC.

Step 2: Clean any registries, created by Flow Crypter 4 on your computer.

The usually targeted registries of Windows machines are the following:

  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce

You can access them by opening the Windows registry editor and deleting any values, created by Flow Crypter 4 there. This can happen by following the steps underneath:

1. Open the Run Window again, type "regedit" and click OK.
Remove Virus Trojan Step 6

2. When you open it, you can freely navigate to the Run and RunOnce keys, whose locations are shown above.
Remove Virus Trojan Step 7

3. You can remove the value of the virus by right-clicking on it and removing it.
Remove Virus Trojan Step 8 Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.

Step 3: Find virus files created by Flow Crypter 4 on your PC.

1.For Windows 8, 8.1 and 10.

For Newer Windows Operating Systems

1: On your keyboard press + R and write explorer.exe in the Run text box and then click on the Ok button.

Remove Virus Trojan Step 9

2: Click on your PC from the quick access bar. This is usually an icon with a monitor and its name is either “My Computer”, “My PC” or “This PC” or whatever you have named it.

Remove Virus Trojan Step 10

3: Navigate to the search box in the top-right of your PC's screen and type “fileextension:” and after which type the file extension. If you are looking for malicious executables, an example may be "fileextension:exe". After doing that, leave a space and type the file name you believe the malware has created. Here is how it may appear if your file has been found:

file extension malicious

N.B. We recommend to wait for the green loading bar in the navigation box to fill up in case the PC is looking for the file and hasn't found it yet.

2.For Windows XP, Vista, and 7.

For Older Windows Operating Systems

In older Windows OS's the conventional approach should be the effective one:

1: Click on the Start Menu icon (usually on your bottom-left) and then choose the Search preference.

Remove Virus Trojan

2: After the search window appears, choose More Advanced Options from the search assistant box. Another way is by clicking on All Files and Folders.

Remove Virus Trojan Step 11

3: After that type the name of the file you are looking for and click on the Search button. This might take some time after which results will appear. If you have found the malicious file, you may copy or open its location by right-clicking on it.

Now you should be able to discover any file on Windows as long as it is on your hard drive and is not concealed via special software.

Flow Crypter 4 FAQ

What Does Flow Crypter 4 Trojan Do?

The Flow Crypter 4 Trojan is a malicious computer program designed to disrupt, damage, or gain unauthorized access to a computer system.

It can be used to steal sensitive data, gain control over a system, or launch other malicious activities.

Can Trojans Steal Passwords?

Yes, Trojans, like Flow Crypter 4, can steal passwords. These malicious programs are designed to gain access to a user's computer, spy on victims and steal sensitive information such as banking details and passwords.

Can Flow Crypter 4 Trojan Hide Itself?

Yes, it can. A Trojan can use various techniques to mask itself, including rootkits, encryption, and obfuscation, to hide from security scanners and evade detection.

Can a Trojan be Removed by Factory Reset?

Yes, a Trojan can be removed by factory resetting your device. This is because it will restore the device to its original state, eliminating any malicious software that may have been installed. Bear in mind, that there are more sophisticated Trojans, that leave backdoors and reinfect even after factory reset.

Can Flow Crypter 4 Trojan Infect WiFi?

Yes, it is possible for a Trojan to infect WiFi networks. When a user connects to the infected network, the Trojan can spread to other connected devices and can access sensitive information on the network.

Can Trojans Be Deleted?

Yes, Trojans can be deleted. This is typically done by running a powerful anti-virus or anti-malware program that is designed to detect and remove malicious files. In some cases, manual deletion of the Trojan may also be necessary.

Can Trojans Steal Files?

Yes, Trojans can steal files if they are installed on a computer. This is done by allowing the malware author or user to gain access to the computer and then steal the files stored on it.

Which Anti-Malware Can Remove Trojans?

Anti-malware programs such as SpyHunter are capable of scanning for and removing Trojans from your computer. It is important to keep your anti-malware up to date and regularly scan your system for any malicious software.

Can Trojans Infect USB?

Yes, Trojans can infect USB devices. USB Trojans typically spread through malicious files downloaded from the internet or shared via email, allowing the hacker to gain access to a user's confidential data.

About the Flow Crypter 4 Research

The content we publish on SensorsTechForum.com, this Flow Crypter 4 how-to removal guide included, is the outcome of extensive research, hard work and our team’s devotion to help you remove the specific trojan problem.

How did we conduct the research on Flow Crypter 4?

Please note that our research is based on an independent investigation. We are in contact with independent security researchers, thanks to which we receive daily updates on the latest malware definitions, including the various types of trojans (backdoor, downloader, infostealer, ransom, etc.)

Furthermore, the research behind the Flow Crypter 4 threat is backed with VirusTotal.

To better understand the threat posed by trojans, please refer to the following articles which provide knowledgeable details.

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