Remove .AMBA Ransomware and Restore Encrypted Files

by Ventsislav Krastev | July 1, 2016 | 0 Comments Backdoor:Win32/Kirts.A, Index Files Encrypted, malware, ransomware, Website Encryption

The AMBA virus, notorious for the fact that it encrypts the databases of websites with .amba file extension added to them has appeared on the radar. The crypto-virus directly attacks the “Index Of” belonging to websites whose servers are not properly secured. Its ransom note is written entirely in Russian language, and its variants have been reported to exist since the year 2013. All website publishers whose servers have been affected by the Amba ransomware are strongly advised to export the files and try to decrypt them instead of paying the requested ransom money.

Threat Summary

Name	AMBA
Type	Ransomware
Short Description	Encrypts files of websites on infected servers and asks for ransom payoff for their decryption.
Symptoms	The user may witness a ransom note as a text document written in Russian, named “ПРОЧТИ_МЕНЯ.txt”.
Distribution Method	Via an Exploit kit, JavaScript or a Trojan.
Detection Tool	See If Your System Has Been Affected by malware Download Malware Removal Tool
User Experience	Join our forum to Discuss WildFire Ransomware.
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.

AMBA Ransomware’s Distribution Scheme

Since Amba ransomware attacks mostly servers, it may use different approach instead of the convention massive spam campaign. For example, if the server is located in a network with other devices, the virus may use a worm to spread across the network to other devices. In addition to this, the creators of Amba may also send malicious URLs directly on the website as spam comments. Such web links may redirect to other URLs which may cause the infection via a drive-by-download. Another possibility is a targeted attack with a Trojan.Downloader, which can download AMBA ransomware’s malicious files, directly on the server.

AMBA Ransomware Viewed In Depth

As soon as it is executed on a given machine, AMBA begins to encipher files that are web server related, for example they may have the following extensions:

→ .4UI .ADB .AFP .ANH .ANTMPL .AO .AP .ARTICLE .AVERY .BCF .BCP .BIZ .BLK .BOOK .BPF .BRO .BRO .BTW .CADOC .CAJ .CAL .CBF .CD2 .CDF .CDML .CDOC .CEDPRJ .CH3 .CL2ARC .CL2DOC .CL2LYT .CL2TPL .CLD .CLKB .CLKBD .CLKC .CLKD .CLT .CNDX .COMICDOC .COMICLIFE .COMPOSITIONTEMPLATE .COV .CPE .CPH .CPY .CRTR .CSD .CST .CVW .CW .CWT .DCX .DMTEMPLATE .DOT .DPD .DRMX .DRMZ .DTL .DTP .DTX .DWDOC .EDRWX .ENC .ENV .FADEIN .FAX .FCDT .FD2 .FDD .FDT .FLB .FM .FOLIO .FORM .FP3 .FR3 .FRDOC .FRF .FSD .FXM .GEM .HCR .HFD .HFT .HMK .HPD .HPT .ICAP .ICML .ICMT .IDAP .IDML .IDMS .IDPK .IFD .ILDOC .IMM .IMTX .IMX .INCD .INCT .INCX .IND .INDB .INDD .INDL .INDP .INDS .INDT .INFOPATHXML .INP .INX .ISALE .ISALETEMPLATE .ISALLIC .ISD .JTP .JTX .JTX .LAB .LBL .LBL .LLD .LMA .LPDF .LSC .LST .LTF .MAILSTATIONERY .MARS .MAX .MBBK .MCSP .MCSX .MDI .MFO .MFP .MFT .MGA .MIF

After encrypting the databases of websites, the AMBA virus adds its own “trademark” – the AMBA file extension. Files of websites encrypted by AMBA look like the following image, reported by Amigo A – malware researcher at id-ransomware.blogspot.bg:

After encrypting the files on the website of the server, AMBA ransomware uses a text file to notify users that their files have been encrypted. The file is named ПРОЧТИ_МЕНЯ.txt and has the following message in it:

“——————————————————————————–
Место для Вашей рекламы
——————————————————————————–
Вся Ваша информация (документы, базы данных, бэкапы)
на этом компьютере была зашифрована.
Для расшифровки обратитесь по нижеуказанным контактам.

ПРОЧТИ_МЕНЯ.txt-ransom-note-sensorstechforum

Ни в коем случае не изменяйте файлы!
И не используйте чужие дешифраторы, Вы можете потерять Ваши файлы навсегда.
Каждый дешифратор – уникален, чужой – просто испортит Ваши файлы.
Благодоря нам – вы можете усилить свою безопасность
и предотвратить подобные ситуации!
——————————————————————————–
e-mail: amba@riseup.net
———————————–
Ваш код для разблокировки: {UNIQUE VICTIM ID}
—————————————————————
Внимание! В первом письме не прикрепляйте файлы для дешифровки.
Все инструкции вы получите в ответном письме.”

The ransom message translates to the following:

Place for your advertisement.
All your information (documents, database files, backups) on this computer was encrypted. To decrypt it contact the belowmentioned contacts. Do not try to modify the files in any circumstance! Do not use foreign decryptors, you may lose your files forever. Every decrypter – unique, foreign will just break your files. Thanks to us, you can increase your safety and avoid such situations!
e-mail: amba@riseup.net
Your decipher code: {UNIQUE VICTIM ID}
Attention! In the first letter do not attach the decipher code. Your will receive all instructions in the reply letter”

Remove AMBA Ransomware from Your Server

To get rid of AMBA ransomware, we strongly advise you to make sure to isolate the threat first. We have prepared a removal on how to get in safe mode and hopefully stop any processes which belong to AMBA Ransomware. You may also want to restore your files, for which there is no current decryptor. We have prepared instructions below which will help you to remove AMBA ransomware effectively from Windows servers and try to restore your files.

If you want to use the manual removal instructions, we advise you to look for it in the system folders of your server. In case you cannot find them and find any registry entries associated with AMBA, we advise you to follow the automatic removal instructions which are also recommended by experts. They include instructions on how to try alternative methods to get your files back.

Ventsislav Krastev

Ventsislav is a cybersecurity expert at SensorsTechForum since 2015. He has been researching, covering, helping victims with the latest malware infections plus testing and reviewing software and the newest tech developments. Having graduated Marketing as well, Ventsislav also has passion for learning new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management, Network Administration and Computer Administration of System Applications, he found his true calling within the cybersecrurity industry and is a strong believer in the education of every user towards online safety and security.

How to Remove AMBA from Windows.

Step 1: Boot Your PC In Safe Mode to isolate and remove AMBA

OFFER

Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!

We Recommend To Scan Your PC with SpyHunter

Keep in mind, that SpyHunter’s scanner is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter's malware removal tool to remove the malware threats. Read our SpyHunter 5 review. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria

1. Hold Windows key() + R

2. The "Run" Window will appear. In it, type "msconfig" and click OK.

3. Go to the "Boot" tab. There select "Safe Boot" and then click "Apply" and "OK".

Tip: Make sure to reverse those changes by unticking Safe Boot after that, because your system will always boot in Safe Boot from now on.

4. When prompted, click on "Restart" to go into Safe Mode.

5. You can recognise Safe Mode by the words written on the corners of your screen.

Step 2: Uninstall AMBA and related software from Windows

Here is a method in few easy steps that should be able to uninstall most programs. No matter if you are using Windows 10, 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program are left behind, and that can lead to unstable work of your PC, errors with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it. To do that:

1. Hold the Windows Logo Button and "R" on your keyboard. A Pop-up window will appear.

2. In the field type in "appwiz.cpl" and press ENTER.

3. This will open a window with all the programs installed on the PC. Select the program that you want to remove, and press "Uninstall"

Follow the instructions above and you will successfully uninstall most programs.

Step 3: Clean any registries, created by AMBA 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 AMBA there. This can happen by following the steps underneath:

1. Open the Run Window again, type "regedit" and click OK.

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

3. You can remove the value of the virus by right-clicking on it and removing it.

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.

IMPORTANT!
Before starting "Step 4", please boot back into Normal mode, in case you are currently in Safe Mode.
This will enable you to install and use SpyHunter 5 successfully.

Step 4: Scan for AMBA with SpyHunter Anti-Malware Tool

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

Download

Malware Removal Tool

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.

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

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.

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

Step 5 (Optional): Try to Restore Files Encrypted by AMBA.

Ransomware infections and AMBA aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.

1. Download the reccomended Data Recovery software by clicking on the link underneath:

EaseUS Data Recovery Software

Simply click on the link and on the website menus on top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.

Windows Mac OS X

Get rid of AMBA from Mac OS X.

Step 1: Uninstall AMBA and remove related files and objects

OFFER

Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!

We Recommend To Scan Your Mac with SpyHunter for Mac

Keep in mind, that SpyHunter for Mac needs to purchased to remove the malware threats. Click on the corresponding links to check SpyHunter’s EULA and Privacy Policy

1. Hit the ⇧+⌘+U keys to open Utilities. Another way is to click on “Go” and then click “Utilities”, like the image below shows:

2. Find Activity Monitor and double-click it:

3. In the Activity Monitor look for any suspicious processes, belonging or related to AMBA:

Tip: To quit a process completely, choose the “Force Quit” option.

4. Click on the "Go" button again, but this time select Applications. Another way is with the ⇧+⌘+A buttons.

5. In the Applications menu, look for any suspicious app or an app with a name, similar or identical to AMBA. If you find it, right-click on the app and select “Move to Trash”.

6: Select Accounts, after which click on the Login Items preference. Your Mac will then show you a list of items that start automatically when you log in. Look for any suspicious apps identical or similar to AMBA. Check the app you want to stop from running automatically and then select on the Minus (“-“) icon to hide it.

7: Remove any left-over files that might be related to this threat manually by following the sub-steps below:

Go to Finder.
In the search bar type the name of the app that you want to remove.
Above the search bar change the two drop down menus to “System Files” and “Are Included” so that you can see all of the files associated with the application you want to remove. Bear in mind that some of the files may not be related to the app so be very careful which files you delete.
If all of the files are related, hold the ⌘+A buttons to select them and then drive them to “Trash”.

In case you cannot remove AMBA via Step 1 above:

In case you cannot find the virus files and objects in your Applications or other places we have shown above, you can manually look for them in the Libraries of your Mac. But before doing this, please read the disclaimer below:

Disclaimer! If you are about to tamper with Library files on Mac, be sure to know the name of the virus file, because if you delete the wrong file, it may cause irreversible damage to your MacOS. Continue on your own responsibility!

1: Click on "Go" and Then "Go to Folder" as shown underneath:

2: Type in "/Library/LauchAgents/" and click Ok:

3: Delete all of the virus files that have similar or the same name as AMBA. If you believe there is no such file, do not delete anything.

You can repeat the same procedure with the following other Library directories:

→ ~/Library/LaunchAgents
/Library/LaunchDaemons

Tip: ~ is there on purpose, because it leads to more LaunchAgents.

Click the button below below to download SpyHunter for Mac and scan for AMBA:

Download

SpyHunter for Mac

Step 3 (Optional): Try to Restore Files Encrypted by AMBA.

1. Download the reccomended Data Recovery software by clicking on the link underneath:

EaseUS Data Recovery Software

Simply click on the link and on the website menus on top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.

AMBA FAQ

What is AMBA ransomware and how does it work?

AMBA is a ransomware infection - the malicious software that enters your computer silently and blocks either access to the computer itself or encrypt your files.

Many ransomware viruses use sophisticated encryption algorithm how to make your files inaccessible. The goal of ransomware infections is to demand that you pay a ransom payment to get access to your files back.

How does AMBA ransomware infect my computer?

Via several ways.AMBA Ransomware infects computers by being sent via phishing e-mails, containing virus attachment.

This attachment is usually masked as an important document, like an invoice, bank document or even a plane ticket and it looks very convincing to users.

After you download and execute this attachment, a drive-by download occurs and your computer is infected with the ransomware virus.

Another way, you may become a victim of AMBA is if you download a fake installer, crack or patch from a low reputation website or if you click on a virus link. Many users report getting a ransomware infection by downloading torrents.

How to open .AMBA files?

You can't. At this point the .AMBA files are encrypted. You can only open them once they are decrypted.

Decryptor did not decrypt my data. What now?

Do not panic and backup the files. If a decryptor did not decrypt your .AMBA files successfully, then do not despair, because this virus is still new.

One way to restore files, encrypted by AMBA ransomware is to use a decryptor for it. But since it's a new virus, advised that the decryption keys for it may not be out yet and available to the public. We will update this article and keep you posted as soon as this decryptor is released.

How Do I restore ".AMBA" files (Other Methods)?

Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore .AMBA files.

These methods are in no way 100% guarantee that you will be able to get your files back. But if you have a backup, your chances of success are much greater.

How do I get rid of AMBA ransomware virus?

The safest way and the most efficient one for the removal of this ransomware infection is the use a professional anti malware software. It will scan for and locate AMBA ransomware and then remove it without causing any additional harm to your important .AMBA files.

Also, keep in mind that viruses like AMBA ransomware also install Trojans and keyloggers that can steal your passwords and accounts. Scanning your computer with an anti-malware software will make sure that all of these virus components are removed and your computer is protected in the future.

What to Do If nothing works?

There is still a lot you can do. If none of the above methods seem to work for you, then try these methods:

Try to find a safe computer from where you can can login on your own line accounts like One Drive, iDrive, Google Drive and so on.
Try to contact your friends, relatives and other people so that they can check if they have some of your important photos or documents just in case you sent them.
Also, check if some of the files that were encrypted it can be re-downloaded from the web.
Another clever way to get back some of your files is to find another old computer, a flash drive or even a CD or a DVD where you may have saved your older documents. You might be surprised what will turn up.
You can also go to your email account to check if you can send any attachments to other people. Usually what is sent the email is saved on your account and you can re-download it. But most importantly, make sure that this is done from a safe computer and make sure to remove the virus first.

More tips you can find on our forums, where you can also asks any questions about your ransomware problem.