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OMFL ransomware is a malicious computer virus, recognized as the 272nd version of STOP/DJVU. This ransomware scans all computer folders and encrypts personal files stored in them, then appends .omfl extension to their original names. Finally, the virus creates _readme.txt ransom notes that explain file recovery procedure. The note suggests that the only way to decrypt .omfl files is contacting the criminals and paying ransom to them. In other words, the developers of this ransomware convert victim’s personal files into unreadable format to keep them hostage until a ransom is paid. The virus specifies the ransom price – it ranges from $490 to $980. The attackers ask to receive in in cryptocurrency (such as Bitcoin). For further information, they leave two email addresses for victim to contact them – helpmanager@mail.ch or restoremanager@airmail.cc.
This ransomware-type malware mainly infects computers disguised as a software crack. Short summary of damage that OMFL virus causes on the system:
Before the data encryption itself, OMFL virus first connects to its Command&Control server to request a new encryption key (also called “the online key”). This key is RSA public key used to encrypt files on a computer. To decrypt them, private decryption key is needed.
Sometimes failure to connect to the C&C server happens. In such situation, the virus is set to use a hardcoded-offline encryption key that is included in the malicious code itself. That said, the same offline key is used for all victims on whose computers the connection to C&C failed. In simple terms, this gives hope to restore files someday. To learn more about this, please read our STOP/DJVU decryption/repair article.
The aim of this virus’ creators is to take control of victim’s files, preventing any access to them for the victim. The cybercriminals know that computer users keep valuable information, such as family memories, schoolwork or work documents and projects on their home computers often, and seek to force these users to pay a ransom for fast .omfl file decryption.
In _readme.txt notes, OMFL file virus developers provide details regarding the decryption software pricing. They rush the victim to contact them, because if the ransom-payment conditions will be met in 3 days, the decryption tools will cost $490. In case of delay, the price rises to $980. The payment procedure involves purchasing cryptocurrency worth the specified sum. The note also suggests including one encrypted file to the email for test decryption. The criminals offer to decrypt it for free.
Ransomware attack is a catastrophe for those who do not have any data backups. More than that, the ransom price demanded by the criminals is simply hefty. We do not recommend paying the ransom under any circumstances. There are more than enough reasons not to:
You have been infected with one of the most widespread ransomware-type viruses that originate from STOP/DJVU family. We do not recommend paying the ransom. There are many tools you can use to repair part of virus damage. You can find a list of them below the article.
OMFL ransomware virus is a close copy of other STOP/DJVU variants, such as BOOA, IGDM, NOBU, or EPOR. Viruses from this malware group generally fall into two categories: old (decryptable) and new (hard to decrypt). The virus that infected your computer belongs to the second category.
Victims infected with this ransomware are advised to scan with RESTORO software to remove BOOA ransomware virus damage on the Windows OS.
After removing the virus, change passwords for logins saved in your browsers. This ransomware tends to install AZORULT malware on the system.
ame | OMFL ransomware virus |
Type | Ransomware; Crypto-virus; File locker |
Encryption algorithm | RSA |
Other versions | EPOR, WEUI, LISP, SGLH, IGDM, BOOA |
Ransom note | _readme.txt |
Extension | .omfl file |
Criminal contacts | helpmanager@mail.c, restoremanager@airmail.cc |
Ransom demand | $490-$980 |
Decryption tools | Try to decrypt .omfl files using Emsisoft decryptor for STOP/DJV. Alternatively, try repairing them using Media_Repair tool. For full recovery, data backups are needed. |
Distribution | Copyright-protected peer-to-peer downloads (torrents), infectious web domains, malspam (infected attachments and phishing links) |
Removal | Remove this ransomware and additional malware using robust anti-malware tools. For virus damage repair, scan with RESTORO. |
Scan your system for FREE to detect security, hardware and stability issues. You can use the scan results and try to remove threats manually, or you can choose to get the full version of software to fix detected issues and repair virus damage to Windows OS system files automatically. Includes Avira spyware/malware detection & removal engine.
OMFL ransomware distribution is based on torrent files that are often downloaded via various peer-to-peer download agents, such as uTorrent. To be specific, the criminals create fake software cracks or keygen files, or simply name the malicious executable as one. Then they upload such files to shady torrent websites.
Victims choose to download these files themselves by trying to bypass paying for legitimate software licenses. Many victims reported installing this ransomware via Adobe Photoshop cracks or KMSPico. Needless to say, you should refrain from downloading illegal software copies as this can clearly lead to much bigger financial and non-financial losses.
Ransomware operators also like to distribute these viruses via email spam campaigns. To spread these viruses, criminals hide the malicious payloads in a form of email attachments or attach as link. To hide a suspicious link, the attackers often use link shortening services.
In these pandemic times, criminals leverage the fact that many people shop online. That said, the scams are frequently based on parcel delivery theme. Do not rush to open a parcel tracking email from DPD, DHL, UPS or another parcel delivery company, because this might be a scam. Look for suspicious details, such as email address mistakes, typo or grammar failures, and logos. If anything looks a bit off, contact the parcel delivery company via phone.
We provide several simple tips to avoid getting infected with crypto-malware or any kinds of virus in general.
Remove OMFL ransomware virus from your computer to avoid further damage. We strongly recommend reading professional instructions prepared by our team. In addition, you can try the recommended software for virus damage repair.
Once OMFL ransomware removal is complete, scroll down to the file decryption tutorial. These are confirmed and currently known tools used to restore files encrypted by various STOP/DJVU versions. If you get a response that you were affected with offline key, you might need to keep checking back for updates every few months to see if decryption key is available.We also recommend reporting Internet crime incident via provided authority pages below.
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Our team recommends a two-step rescue plan to remove ransomware and other remaining malware from your computer, plus repair caused virus damage to the system:
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OMFL ransomware Removal Guidelines
Before you try to remove OMFL ransomware virus, you must start your computer in Safe Mode with Networking. Below, we provide the easiest ways to boot PC in the said mode, but you can find additional ones in this in-depth tutorial on our website – How to Start Windows in Safe Mode. Also, if you prefer a video version of the tutorial, check our guide How to Start Windows in Safe Mode on Youtube.
Instructions for Windows XP/Vista/7 users
Instructions for Windows 8/8.1/10/11 users
Now, you can search for and remove OMFL ransomware files. It is very hard to identify files and registry keys that belong to the ransomware virus, Besides, malware creators tend to rename and change them repeatedly. Therefore, the easiest way to uninstall such type of a computer virus is to use a reliable security program such as INTEGO Antivirus, which also includes data recovery software. For virus damage repair, consider using RESTORO.
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RESTORO is a unique PC Repair Tool which comes with an in-built Avira scan engine to detect and remove spyware/malware threats and uses a patented technology to repair virus damage. The software can repair damaged, missing or malfunctioning Windows OS files, corrupted DLLs, and more. The free version offers a scan that detects issues. To fix them, license key for the full software version must be purchased.
In order to use System Restore, you must have a system restore point, created either manually or automatically.
Instructions for Windows XP/Vista/7 users
Instructions for Windows 8/8.1/10/11 users
After restoring the system, we recommend scanning the system with antivirus or anti-malware software. In most cases, there won't be any malware remains, but it never hurts to double-check. In addition, we highly recommend checking ransomware prevention guidelines provided by our experts in order to protect your PC against similar viruses in the future.
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Removing spyware and malware is one step towards cybersecurity. To protect yourself against ever-evolving threats, we strongly recommend purchasing a Premium version of Malwarebytes Anti-Malware, which provides security based on artificial intelligence and machine learning. Includes ransomware protection. See pricing options and protect yourself now.
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It is reported that STOP/DJVU ransomware versions encrypt only the beginning 150 KB of each file to ensure that the virus manages to affect all files on the system. In some cases, the malicious program might skip some files at all. That said, we recommend testing this method on several big (>1GB) files first.
STOP/DJVU ransomware versions are grouped into old and new variants. OMFL ransomware is considered the new STOP/DJVU variant, just like VYIA, QBAA, FOPA, VTYM, KQGS, XCBG, BPQD (find full list here). This means full data decryption is now possible only if you have been affected by offline encryption key. To decrypt your files, you will have to download Emsisoft Decryptor for STOP DJVU, a tool created and maintained by a genius security researcher Michael Gillespie.
Note! Please do not spam the security researcher with questions whether he can recover your files encrypted with online key - it is not possible.
In order to test the tool and see if it can decrypt OMFL files, follow the given tutorial.
The OMFL decryption tool might display several different messages after failed attempt to restore your files. You might receive one of the following messages:
Error: Unable to decrypt file with ID: [example ID]
This message typically means that there is no corresponding decryption key in the decryptor's database.
No key for New Variant online ID: [example ID]
Notice: this ID appears to be an online ID, decryption is impossible
This message informs that your files were encrypted with online key, meaning no one else has the same encryption/decryption key pair, therefore data recovery without paying the criminals is impossible.
Result: No key for new variant offline ID: [example ID]
This ID appears to be an offline ID. Decryption may be possible in the future.
If you were informed that an offline key was used, but files could not be restored, it means that the offline decryption key isn't available yet. However, receiving this message is extremely good news, meaning that it might be possible to restore your OMFL extension files in the future. It can take a few months until the decryption key gets found and uploaded to the decryptor. We recommend you to follow updates regarding the decryptable DJVU versions here. We strongly recommend backing up your encrypted data and waiting.
Victims of OMFL ransomware should report the Internet crime incident to the official government fraud and scam website according to their country:
If you can't find an authority corresponding to your location on this list, we recommend using any search engine to look up "[your country name] report cyber crime". This should lead you to the right authority website. We also recommend staying away from third-party crime report services that are often paid. It costs nothing to report Internet crime to official authorities.
Another recommendation is to contact your country's or region’s federal police or communications authority.
You can only open OMFL files if you have the decryption key, or if you were affected by offline encryption type.
To figure out whether you were affected by offline encryption, please go to C:/SystemID/PersonalID.txt and see if the string inside of it ends in t1. You can also try using Emsisoft Decryptor for STOP/DJVU.
Please follow the guidances provided by the official OMFL decryption tools and believe what they say. If they say it is impossible to decrypt, it really is so. There is no magic tool or human capable of decrypting your files hiding somewhere. Encryption is a technique created to be nearly impossible to decrypt without a special private key (held by the criminals).
We advise scanning with anti-virus, anti-malware, malware removal tools or software like RESTORO to eliminate virus damage on the system. If you do not trust using a single tool, try running one after another. However, we do not recommend keeping several security programs on a computer at once as they can interfere with each other's work.
Beware of fake OMFL decryption tools circulating around the web. Cyber criminals are uploading them to various shady websites, also might be promoting them via suspicious Youtube videos. These programs can infect your computer even more heavily (Trojans, miners, etc.). We suggest being extremely cautious around the web. If there will be an official STOP/DJVU decryption tool available, it will be widely discussed in public media.
Norbert Webb is the head of Geek’s Advice team. He is the chief editor of the website who controls the quality of content published. The man also loves reading cybersecurity news, testing new software and sharing his insights on them. Norbert says that following his passion for information technology was one of the best decisions he has ever made. “I don’t feel like working while I’m doing something I love.” However, the geek has other interests, such as snowboarding and traveling.
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Sir,
in my external hard disc & system hard disc all files are converted into .omfl please guide and how recover my data please reply....
Thanks..