What is STOP Ransomware

New wave of STOP Ransomware infection continues with .nacro, .mtogas, .coharos and .nasoh variations. Those extensions are added to encrypted files in the middle of August of 2019. This tricky virus uses AES encryption algorithm to encode user’s important information. As a rule, STOP Ransomware attacks photos, videos and documents – data, that people value. The malware developers extort ransom and promise to provide decryption key in return. After infection malware creates _readme.txt file, that acts as ransom note and contains following message:

ATTENTION!
Don't worry, you can return all your files!
All your files like photos, databases, documents and other important are encrypted with strongest encryption and unique key.
The only method of recovering files is to purchase decrypt tool and unique key for you.
This software will decrypt all your encrypted files.
What guarantees you have?
You can send one of your encrypted file from your PC and we decrypt it for free.
But we can decrypt only 1 file for free. File must not contain valuable information.
You can get and look video overview decrypt tool:
hxxps://we.tl/t-g2wRDh3Pih
Price of private key and decrypt software is $980.
Discount 50% available if you contact us first 72 hours, that's price for you is $490.
Please note that you'll never restore your data without payment.
Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours.
To get this software you need write on our e-mail:
gorentos@bitmessage.ch
Reserve e-mail address to contact us:
gorentos2@firemail.cc
Our Telegram account:
@datarestore
Mark Data Restore
Your personal ID:
{random-44-character-alphanumeric-id}

In the ransom note, we can see, that malefactors demand $980 (amount can be reduced if paid within the first 72 hours). Hackers offer victims to contact them via e-mails: gorentos@bitmessage.ch and gorentos2@firemail.cc. In most cases algorithms of STOP Ransomware are unbreakable. But virus code has its flaws. Particularly, if attacked PC lost internet connection during ransomware activity or hackers servers experienced some sort of malfunction, there are high chances to recover your files. In this case, STOP Ransomware generates an offline key, that can be retrieved by special decryption tool – STOPDecrypter. Below we provide you with download links and instruction to use this utility. There are standard Windows system functions, such as restore points, the shadow copies, previous versions of files, can be useful, although, malicious algorithms often prevent such opportunities. Stellar Data Recovery Professional is one of the best file-recovery tools and, if used properly, may recover some copies of encrypted files, that were removed earlier. Removal and decryption guide for STOP Ransomware and .nacro, .mtogas, .coharos or .nasoh files, encrypted by the virus.

  1. Download STOP Ransomware Removal Tool
  2. Get decryption tool for .nacro, .mtogas, .coharos or .nasoh files
  3. Recover encrypted files with Stellar Data Recovery Professional
  4. Restore encrypted files with Windows Previous Versions
  5. Restore files with Shadow Explorer
  6. How to protect from threats like STOP Ransomware

STOP Ransomware (.nacro, .mtogas, .coharos or .nasoh extensions)

How STOP Ransomware infected your PC

Virus modifies “hosts” file to block Windows updates, downloading antivirus programs, and visiting sites related to security news or offering security solutions. STOP Ransomware comes along with AZORult trojan, that was initially created to steal logins and passwords. The process of infection also looks like installing Windows updates, the malware shows a fake window, that mimics update process.

fake windows update from STOP Ransomware

It uses rdpclip.exe to replace a legal Windows file and to launch an attack on a computer network. After encrypting the files, the encrypter is deleted using the delself.bat command file. STOP Ransomware virus is propagated via spam attack with malicious e-mail attachments and using manual PC hacking. Can be distributed by hacking through an unprotected RDP configuration, fraudulent downloads, exploits, web injections, fake updates, repackaged and infected installers. Virus assigns certain ID with the victims, that is used to name those files and supposedly to send decryption key. Great tools to protect against STOP Ransomware are: Emsisoft Anti-Malware and Malwarebytes Anti-Malware.

Download STOP Ransomware Removal Tool

Download Removal Tool

To remove STOP Ransomware completely, we recommend you to use SpyHunter 5 from EnigmaSoft Limited. It detects and removes all files, folders and registry keys of STOP Ransomware. The trial version of SpyHunter 5 offers virus scan and 1-time removal for FREE.

How to remove STOP Ransomware manually

It is not recommended to remove STOP Ransomware manually, for safer solution use Removal Tools instead.

STOP Ransomware files:

_readme.txt
rdpclip.exe
delself.bat
{randomname}.exe

STOP Ransomware registry keys:

no information

How to decrypt and restore .nacro, .mtogas, .coharos or .nasoh files

Use automated decryptors

Download STOPDecrypter (.nacro, .mtogas, .coharos or .nasoh variations)

IMPORTANT: Read this F.A.Q. and guide on using STOPDecrypter to avoid file corruption and time wasting.

STOP Ransomware decrypter

STOPDecrypter is able to decrypt .nacro, .mtogas, .coharos or .nasoh files, encrypted by STOP Ransomware. This tool was developed by Michael Gillespie. It requires encrypted and original file pair with the size more ~150 Kb and works only for those encrypted with offline keys. Download it here:

Download STOPDecrypter

If you are infected with STOP Ransomware and removed it from your computer, you can try decrypting your files. Antivirus vendors and individuals create free decryptors for some crypto-lockers. To attempt to decrypt them manually you can do the following:

Use Stellar Data Recovery Professional to restore .nacro, .mtogas, .coharos or .nasoh files

stellar data recovery professional

  1. Download Stellar Data Recovery Professional.
  2. Click Recover Data button.
  3. Select type of files you want to restore and click Next button.
  4. Choose location where you would like to restore files from and click Scan button.
  5. Preview found files, choose ones you will restore and click Recover.
Download Stellar Data Recovery Professional

Using Windows Previous Versions option:

  1. Right-click on infected file and choose Properties.
  2. Select Previous Versions tab.
  3. Choose particular version of the file and click Copy.
  4. To restore the selected file and replace the existing one, click on the Restore button.
  5. In case there is no items in the list choose alternative method.

Using Shadow Explorer:

  1. Download Shadow Explorer program.
  2. Run it and you will see screen listing of all the drives and the dates that shadow copy was created.
  3. Select the drive and date that you want to restore from.
  4. Right-click on a folder name and select Export.
  5. In case there are no other dates in the list, choose alternative method.

If you are using Dropbox:

  1. Login to the DropBox website and go to the folder that contains encrypted files.
  2. Right-click on the encrypted file and select Previous Versions.
  3. Select the version of the file you wish to restore and click on the Restore button.

How to protect computer from viruses like STOP Ransomware in future

1. Get special anti-ransomware software

Use BitDefender Anti-Ransomware

bitdefender anti-ransomware

Famous antivirus vendor BitDefender released free tool, that will help you with active anti-ransomware protection, as additional shield to your current protection. It will not conflict with bigger security applications. If you are searching complete internet security solution consider upgrading to full version of BitDefender Internet Security 2018.

Download BitDefender Anti-Ransomware

2. Back up your files

onedrive backup

Regardless of success of protection against ransomware threats, you can save your files using simple online backup. Cloud services are quite fast and cheap nowadays. There is more sense using online backup, than creating physical drives, that can get infected and encrypted when connected to PC or get damaged from dropping or hitting. Windows 10 and 8/8.1 users can find pre-installed OneDrive backup solution from Microsoft. It is actually one of the best backup services on the market, and has reasonable pricing plans. Users of earlier versions can get acquainted with it here. Make sure to backup and sync most important files and folders in OneDrive.

3. Do not open spam e-mails and protect your mailbox

spamfighter

Malicious attachments to spam or phishing e-mails is most popular method of ransomware distribution. Using spam filters and creating anti-spam rules is good practice. One of the world leaders in anti-spam protection is SpamFighter. It works with various desktop applications, and provides very high level of anti-spam protection.

Download SPAMFighter 4.33/5 (3)

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