What is Omfl Ransomware
Omfl Ransomware is a prevalent encryption virus and blackmailer, that targets valuable personal files. After infection and data encoding hackers start extorting the ransom. There have been more than 300 versions of the ransomware, each version gets slightly modified to circumvent the protection, but the main footprints remain the same. The malware uses AES-256 in CFB mode. Shortly after launch, the STOP family cryptographer executable connects to C&C, retrieves the encryption key and infection ID for the victim’s PC. Data is transmitted over simple HTTP in the form of JSON. If C&C is not available (the PC is not connected to the Internet, the server itself is not working), the cryptographer uses the hard-coded key and ID in it and performs offline encryption. In this case, you can decrypt the files without paying a ransom. Variations of STOP Ransomware can be distinguished from each other by ransom notes and extensions it adds to encrypted files. For STOP Ransomware under research today, the extension is: .omfl. The ransom note file _readme.txt is presented below in the text box and picture.
Malefactors demand a $980 fee for decryption (or $490 if paid in 72 hours). As can be expected from criminals, they do not always send the decryption key. There are only a few cases, where victims were able to return their files this way. First of all, you need to remove the infection, as it will detect and prevent your attempts to decrypt the files. Use anti-malware programs below or any famous updated antivirus. Once, the virus is removed you can try STOP Djvu Decryptor from Emsisoft, the most comprehensive utility to break Omfl Ransomware encryption to date. All standard Windows features to restore files are worth trying, although the threat technically reduces the prospects of a successful outcome. The final step is using file-recovery software. The experience shows, that this can be a workaround, that helps to return the information at least partially. Stellar Data Recovery Professional is one of the best file-recovery tools and, if used properly, may recover copies and duplicates of encrypted files, that were removed prior to infection. The only option for a successful 100% recovery is existing backups. We recommend going through the tutorial below carefully and remove Omfl Ransomware and decrypt .omfl files. If you won’t succeed in decryption today, keep encrypted files on your for possible decryption in the future.
- Download Omfl Ransomware Removal Tool
- Get decryption tool for .omfl files
- Recover encrypted files with Stellar Data Recovery Professional
- Restore encrypted files with Windows Previous Versions
- Restore files with Shadow Explorer
- How to protect from threats like Omfl Ransomware
How Omfl 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. Omfl Ransomware comes along with AZORult trojan, which 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 the update process.
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. Omfl 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 a certain ID with the victims, which is used to name those files and supposedly to send decryption key. Great tools to protect against Omfl Ransomware are Emsisoft Anti-Malware and Malwarebytes Anti-Malware.
Download Omfl Ransomware Removal Tool
To remove Omfl Ransomware completely, we recommend you to use WiperSoft AntiSpyware from WiperSoft. It detects and removes all files, folders, and registry keys of Omfl Ransomware and prevents future infections by similar viruses.
Alternative Removal Tool
To remove Omfl Ransomware completely, we recommend you to use SpyHunter 5 from EnigmaSoft Limited. It detects and removes all files, folders, and registry keys of Omfl Ransomware. The trial version of SpyHunter 5 offers virus scan and 1-time removal for FREE.
How to remove Omfl Ransomware manually
It is not recommended to remove Omfl Ransomware manually, for safer solution use Removal Tools instead.
Omfl Ransomware files:
Omfl Ransomware registry keys:
How to decrypt and restore .omfl files
Use automated decryptors
Download STOP Djvu Decryptor from EmsiSoft (.omfl variations)
STOP Djvu Decryptor is able to decrypt .omfl files, encrypted by Omfl Ransomware. This tool was developed by EmsiSoft. It works in automatic mode, but in most cases works only for files encrypted with offline keys. Download it here:
Dr.Web Rescue Pack
Famous antivirus vendor Dr. Web provides free decryption service for the owners of its products: Dr.Web Security Space or Dr.Web Enterprise Security Suite. Other users can ask for help in the decryption of .omfl files by uploading samples to Dr. Web Ransomware Decryption Service. Analysis of files will be performed free of charge and if files are decryptable, all you need to do is purchase a 2-year license of Dr.Web Security Space worth $120 or less. Otherwise, you don’t have to pay.
If you are infected with Omfl 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 .omfl files
- Download Stellar Data Recovery Professional.
- Click Recover Data button.
- Select the type of files you want to restore and click the Next button.
- Choose a location where you would like to restore files from and click the Scan button.
- Preview found files, choose ones you will restore, and click Recover.
Using Windows Previous Versions option:
- Right-click on infected file and choose Properties.
- Select the Previous Versions tab.
- Choose a particular version of the file and click Copy.
- To restore the selected file and replace the existing one, click on the Restore button.
- In case there are no items in the list choose an alternative method.
Using Shadow Explorer:
- Download Shadow Explorer program.
- Run it and you will see screen listing of all the drives and the dates that shadow copy was created.
- Select the drive and date that you want to restore from.
- Right-click on a folder name and select Export.
- In case there are no other dates in the list, choose alternative method.
If you are using Dropbox:
- Login to the DropBox website and go to the folder that contains encrypted files.
- Right-click on the encrypted file and select Previous Versions.
- Select the version of the file you wish to restore and click on the Restore button.
How to protect computer from viruses, like Omfl Ransomware, in future
1. Get special anti-ransomware software
Use BitDefender Anti-Ransomware
Famous antivirus vendor BitDefender released a free tool, that will help you with active anti-ransomware protection, as an 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.
2. Back up your files
As an additional way to save your files, we recommend online backup. Local storages, such as hard drives, SSDs, flash drives, or remote network storages can be instantly infected by the virus once plugged in or connected to. Omfl Ransomware uses some techniques to exploit this. One of the best services and programs for easy automatic online backup is iDrive. It has the most profitable terms and a simple interface. You can read more about iDrive cloud backup and storage here.
3. Do not open spam e-mails and protect your mailbox
Malicious attachments to spam or phishing e-mails are the 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 MailWasher Pro. It works with various desktop applications and provides a very high level of anti-spam protection.