Another CryptMix ransomware variant was discovered by malware researchers, and this one was released under the name Error (also known as Error virus) ransomware. The threat uses an attack method identical to that used by CryptMix and, unfortunately, this means that its victims will not have the chance to take advantage free utility decryption to recover your data. Encryption is not the only scary thing about Error (also known as Error virus) ransomware and other variants, because the authors of these threats have implemented additional measures whose purpose is to ensure that victims will have a minimal chance of recovering their files. To achieve this, Error ransomware will end the attack by disabling system recovery and clearing all saved shadow copies.

Error ransomware attacks not only encrypt files and add new extensions to their names. In addition to all this, the threat will also encode the original file names, thus making it difficult for the victim to see if they have lost any important files during an Error ransomware attack. When Error Ransomware completes all the above tasks, it will proceed to the final stage of the attack – creating a document used to fulfill the attacker's demands. The author of Error ransomware decided to use a simple text file named '_HELP_INSTRUCTIONS.TXT,' which does not include the exact amount of money that victims need to pay. Instead, it tells users of the contact [email protected], [email protected] or [email protected] if they want to know how their data can be recovered.

- Hello!
Attention! All your data has been encrypted!
For specific information, please send us an email with your ID number:
[email protected],
[email protected]
[email protected]
We will help you as soon as possible!
Decipher-code-[deleted] Kol'

Use the Spyhunter malware removal tool for detection purposes only. And .

Although the note does not mention anything about ransom, you can be sure that the authors of Error Ransomware will not be willing to help you if you end up giving them something in return. Ransomware authors are usually after money from their victims, and so it is likely that victims who choose to get in touch will be asked to pay an unhealthy amount of bitcoins in exchange for a decryptor.

Tips for Victims Error Ransomware is an attempt to overcome the problem using alternative methods recovery of files that are not related to the financing of future projects of cyber fraudsters. Naturally, before attempting to obtain any of your data, you should make sure to prevent Error from ransomware causing more damage. The best way to do this is to use anti-malware software to erase all malicious files from your computer.

Error manual removal instructions.

Removing Error related applications

Remove from Windows 7 and Windows Vista

1. Click the Start button and select Control Panel.
2. Select remove program and remove Error.

Remove from Windows XP

1. Open the Start menu and Control Panel.
2. Select Add or Remove Programs and Remove Error.

Remove from Windows 8

1. Simultaneously press Windows key+R and type in Control Panel.
2. Press Enter and go to Uninstall a program.
3. Find unwanted applications and remove Error.

Removing browsers Error

Remove Error from Internet Explorer

Remove Error from Mozilla Firefox

Use the Spyhunter malware removal tool for detection purposes only. And .

Remove Error from Google Chrome

* SpyHunter scanner published on this site is intended to be used as a detection tool only. . To use the delete feature, you will need to purchase full version SpyHunter. If you want to remove SpyHunter, .

Manually editing the Windows registry to remove invalid Bad Request keys is not recommended unless you are a PC service professional. Mistakes made when editing the registry can lead to inoperability of your PC and cause irreparable damage to your operating system. In fact, even one comma placed in the wrong place can prevent your computer from booting!

Due to this risk, we highly recommend using a trusted registry cleaner such as Reimage (developed by Microsoft Gold Certified Partner) to scan and fix any issues related to Error 400. Using a registry cleaner, you will be able to automate the process of finding damaged registry entries. links to missing files (for example, causing a Bad Request error) and broken links within the registry. Before each scan, a backup copy, which allows you to undo any changes with one click and protects you from possible damage to your computer. The best part is that eliminating registry errors can dramatically improve system speed and performance.

Warning: Unless you are an experienced PC user, we DO NOT recommend manually editing the Windows Registry. Using Registry Editor incorrectly can cause serious problems and require Windows reinstallation. We do not guarantee that problems resulting from incorrect use of Registry Editor can be corrected. You use Registry Editor at your own risk.

Before manually restoring Windows registry, you need to create a backup by exporting the part of the registry associated with Bad Request (for example, Windows Operating System):

1. Click on the button Begin.
2. Enter " command" V search bar... DON'T CLICK YET ENTER!
3. While holding down the keys CTRL-Shift on your keyboard, press ENTER.
4. A dialog box for access will be displayed.
5. Click Yes.
6. The black box opens with a blinking cursor.
7. Enter " regedit" and press ENTER.
8. In the Registry Editor, select the Error 400-related key (for example, Windows Operating System) that you want to back up.
9. On the menu File select Export.
10. On the list Save to select the folder where you want to save the backup Windows key Operating System.
11. In field File name Enter a name for the backup file, for example "Windows Operating System backup".
12. Make sure the field Export range value selected Selected branch.
13. Click Save.
14. The file will be saved with extension .reg.
15. You now have a backup of your Bad Request-related registry entry.

The following steps for manually editing the registry will not be described in this article, as they are likely to damage your system. If you would like more information about editing the registry manually, please check out the links below.

Error 400 (Bad Request) is an HTTP response code , which means that the server was unable to process the request sent by the client due to invalid syntax. These HTTP response codes reflect the complex relationships between the client, the web application, the server, and often several third-party web services at once. This can make it difficult to find the cause of an error, even within a controlled development environment.

In this article we will look at what the 400 Bad Request error means (translated as “Invalid request”) and how to fix it

Server side or client side?

All HTTP response codes in the 4xx category are considered client-side errors. Despite this, the appearance of a 4xx error does not necessarily mean that the problem has anything to do with the client, which refers to the web browser or device used to access the application. Often, if you are trying to diagnose a problem with your application, you can immediately ignore most of the client code and components such as HTML, Cascading Style Sheets ( CSS), client-side JavaScript code, etc. This also applies to more than just websites. Many smartphone apps that have a modern user interface are web apps.

On the other hand, a 400 Bad Request error means that the request sent by the client was incorrect for one reason or another. The user client may try to download a file that is too large, the request may be malformed, the HTTP request headers may be incorrect, and so on.

We'll look at some of these scenarios ( and potential solutions) below. But keep in mind: we cannot definitively rule out either the client or the server as the source of the problem. In these cases the server is network object, generating a 400 Bad Request error and returning it as an HTTP response code to the client, but perhaps the client is responsible for the problem.

Start with a thorough application backup

It is important to make a complete backup of your application, database, etc. before making any edits or changes to the system. Even better, it is possible to create a full copy of the application on an additional intermediate server that is not publicly accessible.

This approach will provide a clean testbed in which you can try out all possible scenarios and potential changes to fix an issue without compromising the security or integrity of your live application.

Diagnosis of error 400 Bad Request

Error 400 Bad Request means that the server ( remote computer ) cannot process a request sent by the client (browser) due to a problem that the server interprets as a client-side problem.

There are many scenarios in which a 400 Bad Request error can appear in an application. Below are some of the most likely cases:

• The client accidentally (or intentionally) sends information that is intercepted by the false request router. Some web applications look for special HTTP headers to process requests and ensure that the client is not doing anything malicious. If the expected HTTP header is not found or is incorrect, then a 400 Bad Request error is a possible result.
• The client may be uploading a file that is too large. Most servers or applications have a limit on the size of the downloaded file. This prevents clogging of the channel and other server resources. In many cases, the server will issue a 400 Bad Request error when the file is too large and therefore the request cannot be completed.
• The client is requesting an invalid URL. If a client sends a request to an invalid URL ( incorrectly composed), this may result in a 400 Bad Request error.
• The client is using invalid or outdated cookies. This is possible because the local cookie in the browser is a session identifier. If a particular session token matches a request token from another client, then the server/application may interpret this as a malicious act and issue a 400 Bad Request error code.

Fixing client side issues

Error 400 Bad Request ( try later) it's better to start with a fix on the client side. Here are some tips to try on the browser or device that's giving you the error.

Check the requested URL

The most common cause of the 400 Bad Request error is simply entering an incorrect URL. Domain names ( for example, website) are case-insensitive, so a mixed-case reference like this works the same as the normal lowercase version. But the parts of the URL that come after the domain name are case sensitive. Unless the application/server specifically pre-processes all URLs and converts them to lowercase before executing the request.

It is important to check the URL for inappropriate special characters that should not be there. If the server receives an invalid URL, it will respond with a 400 Bad Request error.

Clear relevant cookies

One potential cause of a 400 Bad Request error is invalid or duplicate local cookies. HTTP cookies are small pieces of data stored on the local device that are used by sites and web applications to “remember” a specific browser or device. Most modern web applications use cookies to store browser- or user-specific data, identifying the customer and making future visits faster and easier.

But cookies that store session information about your account or device may conflict with another session token from another user, giving one (or both of you) a 400 Bad Request error.

In most cases, it is sufficient to only consider your application for the cookies that are specific to the site or web application that is throwing the 400 Bad Request error.

Cookies are stored based on the domain name of the web application, so you can delete only those cookies that match the site's domain, leaving other cookies intact. But if you are not familiar with manually deleting specific cookies, it is much easier and safer to clear all cookies at once.

It can be done different ways depending on the browser you are using:

• Google Chrome;
• Internet Explorer;
• Microsoft Edge;
• Mozilla Firefox;
• Safari.

Upload a smaller file

If you receive a 400 Bad Request error when downloading a file, try it out on a smaller file. This includes "downloads" of files that won't load from your local computer. Even files sent from other computers count as "uploads" from the perspective of the web server running your application.

Sign out and sign in

Try logging out and logging back in. If you have recently cleared your browser cookies, this will automatically log you out the next time you load the page. Just try logging back in to see if the system works correctly.

Also, the application may encounter a problem related to your previous session, which is just a string that the server sends to the client to identify the client for future requests. As with other data, the session token ( or session string) is stored locally on your device in cookies and is transmitted by the client to the server with each request. If the server decides that the session token is invalid or compromised, you may receive a 400 Bad Request error.

In most web applications, logging out and logging back in causes the local session token to be regenerated.

Debugging on common platforms

If you are using common software packages on your server that generate a 400 Bad Request error, examine the stability and functionality of these platforms. The most common content management systems such as WordPress, Joomla! and Drupal, are well tested in their basic versions. But once you start changing the ones they use PHP extensions, it is very easy to provoke unexpected problems that will result in a 400 Bad Request error.

Rollback recent changes

If you updated your content management system just before the 400 Bad Request error appeared, consider rolling back to the previous version that was installed as the fastest and easiest way remove the 400 bad request error.

Likewise, any extensions or modules that have been updated may cause errors on the server side, so rolling back to previous versions these extensions may also help.

But in some cases, CMSs do not provide the ability to roll back to previous versions. This usually happens with popular platforms, so don't be afraid if you can't find an easy way to get back to using old version one or another software platform.

Remove new extensions, modules or plugins

Depending on the specific CMS that the application uses, the names of these components will vary. But in all systems they serve the same purpose: improving the capabilities of the platform relative to its standard functionality.

However, keep in mind that extensions can somehow gain full control over the system, making changes to the PHP, HTML, CSS, JavaScript or database code. Therefore, a wise decision may be to remove any new extensions that have been recently added.

Check for unintentional changes to the database

Even if you deleted an extension through the CMS control panel, this does not guarantee that the changes it made were completely undone. This applies to many WordPress extensions that are given full access to the database.

An extension can change records in the database that do not "belong" to it, but are created and managed by other extensions ( or even the CMS itself). IN similar cases The module may not know how to roll back changes made to database entries.

I have personally encountered such cases several times. Therefore, the best way is to open the database and manually view the tables and records that may have been modified by the extension.

Finding problems on the server side

If you are sure that the 400 Bad Request error is not related to the CMS, here are some additional tips that may help you find the problem on the server side.

When going to any site, or selecting any of the subsections of the site, the user may encounter the message “Request Header Or Cookie Too Large”, and further navigation through the selected link becomes impossible. This is usually due to damaged cookies for this site on the user’s PC, but it is also possible that the problem is caused by incorrect settings for this resource set by the webmaster.

Error with message text

The problem we described earlier may also occur.

What is this error “Request Header Or Cookie Too Large” and its causes

The translation of “Request Header Or Cookie Too Large” is “The request header or cookies are too large.” Typically this refers to a situation where, when a browser requests access to a resource, the server detects that the resource's cookies stored on the user's PC are too large or corrupted. The server refuses to process the request, which is accompanied by the message “400 bad request”, as well as the message I mentioned “Request Header Or Cookie Too Large”.

This error is typical for nginx servers (i.e. servers running on similar Unix operating systems systems) . Once it appears, access to the requested site (or its subsection) becomes impossible, and reloading the problematic page via Ctrl+F5 usually does nothing.

In addition to damaged cookies, the following determinants may be the cause of this dysfunction:

How to fix 400 Bad Request

When trying to get rid of a problem that has arisen, it is important to consider that the problem may be with you (if you are an ordinary user) or with the resource itself. Therefore, if you have tried all the user tips below, and nothing has helped, then it may be worth contacting a letter to technical support resource (or directly to the webmaster), and describe the problem that has arisen.

To resolve the "Cookie Too Large" problem, do the following:

This is implemented by the following entry:

Conclusion

The solution to this Request Header Or Cookie Too Large problem on the user’s part is to delete the cookies of the problematic site on the user’s computer. And from the side of the resource administration effective way The solution to the problem is to change the “large_client_header_buffers” parameter in nginx. In most cases, implementing these tips helps get rid of the error that has arisen by resuming full-time job with the site on your PC.

Nowadays, it is difficult to imagine a person who does not use the Internet. Some people get the necessary information from its vastness, some enjoy their favorite games, and some even do remote work.

Each of them, at least once, was faced with the fact that when asked certain internet page an incomprehensible message appeared - "400 - Bad Request."

What does it mean this message and why it occurs - the average user has no idea about it.

In our article we will try to figure out what it is 400 bad request how to fix and how to avoid such a situation in the future.

In the computing world, a 400 (Bad Request) error occurs when the server is unable to process a client request. This occurs due to incorrect syntax that creates the necessary relationships between various web services, as well as the client and web applications.

This makes it quite difficult to figure out what is causing this problem, even in a controlled development environment.

On whose side did the error occur?

For those who don't know yet - if the code is 4xx - this is http response data, and errors with such digital values ​​​​occur on the client side.

The client refers to both the browser and the device through which the application is accessed.

At its core, the occurrence of such an error may mean that the client device sent an incorrect request for some reason. This may not only be an incorrectly formed request, but also an attempt. This also includes incorrectly formed http headers, which also cause an error with code 4xx.

Remember that in this case, the object generating the 400-Bad Request error can be either the client or the requested server.

Diagnosing the error

An invalid request error may occur due to one of the following reasons:

• A false request router accepts information that a client intentionally or accidentally sends. There is a certain category of web applications that try to detect certain headers in a request that certify that there is no malicious intent. If such headers are missing, a 400 error is the inevitable result;
• when loading too large file The client device may not be able to complete the request. This is due to the existing limit on the size of downloaded files on most servers and applications. In this case, you will also encounter the problem described;
• if the client device requests an incorrectly composed URL, an error warning will also appear;
• in the process of use by the client, outdated or invalid. This is due to the fact that the browser contains local cookies that identify the session. When two tokens - from your client session and from another client are similar - the requested server may regard this situation as a malicious act and display an invalid request error on the screen.

Solving the client side problem

Be that as it may, the most correct solution would be to find and correct faults in client devices and applications.

The first step is to check the correctness.

Often the error lies in its incorrect input.

Do not forget that domain names- no matter how you type them, they will in no way affect correct work links.

For example, internet-company winter group.ru and inTErnet-COmpany grouP.ru will work exactly the same. But everything related to the URL - the information that comes after the domain name - is case sensitive and must be spelled correctly. If the URL contains incorrect characters, the server responds to the request by displaying the error code that occurred.

Clearing cookies

Availability on local server Identical or incorrect cookies are also the cause of the 400 Bad Request error.

These files are small amounts of data that various websites use to remember specific device or the browser from which the request was made.

Thanks to this, all subsequent visits to such a site occur much faster than the first time.

The presence of such cookies creates convenience for the user, but may also cause a conflict with another user's session token. In this case, one of you, and perhaps both of you at the same time, the server will give a 4xx error.

When deleting cookies, you don't have to completely get rid of all existing ones - just delete those that correspond to a specific domain name.

However, if you have no idea about selective deletion, it would be most correct to completely delete.

Each browser has its own cleaning scheme, however, they are all somewhat similar to each other.

Clearing Chrome Browser Cache

• open the specified browser on your computer;
• Using the menu icon located in the upper right part of the working window, select the item « Additional tools» , and then - "Clear browsing data";
• indicate in a special window for what period of time the cleaning should be done;
• from the list, select the item « Cookies and other site data";
• click on the button "Delete data".

After these steps, all saved cookies will be deleted from your browser.

Uploading smaller files

If you're downloading a specific file and getting an invalid request error, it may be because the volume is too large.

Try uploading the file smaller size to make sure the application is working correctly.

Rolling back recent changes

If you updated your client management system before the 400 Bad Request error appeared - The solution to the problem may be to roll back to a previously installed version.

In addition, you can roll back updated extensions and modules, since they can also cause an unpleasant situation.

Removing new extensions and modules

Some extensions have unpleasant feature- modify tables and records in the database that do not belong to them.

In this case, you will have to delete the latest installed extensions, and then manually clear the database of their effects.

Reinstalling the Windows Operating System program

Incorrect operation of this program may cause a Bad Request. To resolve the issue, you should reinstall it.

Let's look at removing this program using an example.

To do this, follow these steps:

• use the Start button to open the tab "Programs and Features";
• open the "Programs" window, the link to which is in the control panel;
• select item "Programs and Features";
• in the “Name” section, find the line “Windows Operating System”. Select it and click on the “Delete” button;
• To complete the removal process, fulfill all the necessary conditions.

After uninstallation, you will need to reinstall this program using the instructions from Microsoft Corporation.

Malware detection and removal

Another reason that can cause a 400 error is that your computer is infected with various .

Such programs can change or completely delete browser state files.

In addition, some components malware may themselves be the cause of the error.

To be able to protect against this type of program, install the appropriate application on your computer. One of the best is Emsisoft Anti-Malware. This application not only protects, but is also guaranteed to remove any malware.

Driver Update

Oddly enough, outdated or incorrectly working drivers can also create a similar problem, so try to check their functionality as often as possible and update them on time.

Manually checking it takes too long, so the easiest way is to install a program on your computer like DriverDoc, which will completely save you from this routine work.

Windows Update

Microsoft continues to work on updating and improving its operating systems.

In some cases, you just need to update your browser status codes and the Bad Request error will go away on its own.

To do this, you will need to use the “Start” button and enter “update” into the search query, and then press the Enter key.

In this case, the OS update dialog will open, which will display all available packages (if any).

If none of the options helped to get rid of the problem - contact specialists.

Video on solving the 400 Bad Request problem: