How to remove Osiris virus

What is Osiris virus?

Osiris virus refers to file-encrypting ransomware from the Locky ransomware family. It’s more or less identical to other ransomware, including .thor and .odin. Once this malware gets into your computer, it will encrypt your files and make them unopenable. The ransomware targets all personal files, including photos, images, videos, documents, etc. It may be difficult to tell which files have been encrypted because their names will be changed.

Users can usually identify which ransomware they’re dealing with by the extensions added to encrypted files. Osiris ransomware is known as such because it adds .osiris. Before .osiris, it also adds 24 random characters as well. For example, an encrypted image.jpg file would become [8 random characters]-[4 random characters]-[4 random characters]-[8 random characters].osiris. Unless you use a decryptor on these files, you will not be able to open any of them.

Once the ransomware is finished with file encryption, it will show a ransom note on the desktop. The note explains what happened to your files and explains that to recover them, you’d need to pay a ransom. Victims are assigned a custom ID that would help the cyber criminals identify who the victim is and theoretically send the correct decryptor as they are different for each victim. However, we should caution you that paying the ransom does not guarantee a decryptor considering you are dealing with cybercriminals.

The best way to recover files is from backup. If you have copies of your files in a backup, you should have no trouble recovering files. However, you first need to make sure to fully delete Osiris virus from your computer. Only when the ransomware is fully gone from your device is it safe to access your backup.

How does ransomware infect computers?

Ransomware is usually distributed via methods like emails, torrents, ads, etc. If you have bad online habits, you’re much more likely to pick up malware because of your recklessness when online. If you take the time to develop better habits, you will be able to avoid many malware infections in the future.

Email attachments are one of the most common ways users infect their computers with malware. Opening a malicious attachment is enough to trigger the infection, and in this case, allow the ransomware to initiate. It’s quite a low effort distribution method for cybercriminals because they can easily purchase email addresses from hacker forums and write a semi-convincing email to attach the malicious file to. Fortunately for users, these emails are usually quite easy to recognize. The most obvious sign is grammar and spelling mistakes in emails whose senders claim to be from legitimate companies. It goes without saying that mistakes in official correspondence appear unprofessional so companies will be very careful to avoid them. Furthermore, malicious emails often address users with generic terms like User, Member, Customer, etc., despite saying that users use their services. If a company whose services you use sends you an email, you will always be addressed by your name, or the name you have given the company. But while most malicious spam campaigns will very obvious, some may be more sophisticated, which is why it’s recommended to scan all unsolicited email attachments with anti-virus software or VirusTotal before opening them.

Torrents are also a common way users pick up malicious infections. You probably already know this but torrent sites are notoriously badly regulated. This allows malicious actors to easily upload malicious content in torrents for popular movies, TV series, video games, software, etc. The more popular the content is, the more likely its torrents will have malware in them. So if you use torrents to download copyrighted content, you’re not only essentially stealing but also endangering your computer.

Osiris virus removal

Because ransomware is a very complex malware infection, it’s not a good idea to try to remove Osiris virus manually. Unless you know exactly what to do, you may accidentally cause additional damage. Furthermore, incorrectly removing the ransomware could allow it to recover later on. And if the ransomware is still present when you connect to your backup, your backed-up files would become encrypted as well.

If you do not have a backup, your only option may be to wait for a free decryptor to be released. However, because that may be a while, back up your encrypted files and wait for a free decryptor. You can check NoMoreRansom for free decryptors.

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Quick Menu

Step 1. Uninstall Osiris virus and related programs.

• Windows 8
• Windows 7
• Windows XP
• Mac OS

Remove Osiris virus from Windows 8

Right-click in the lower left corner of the screen. Once Quick Access Menu shows up, select Control Panel choose Programs and Features and select to Uninstall a software.

Uninstall Osiris virus from Windows 7

Click Start → Control Panel → Programs and Features → Uninstall a program.

Delete Osiris virus from Windows XP

Click Start → Settings → Control Panel. Locate and click → Add or Remove Programs.

Remove Osiris virus from Mac OS X

Click Go button at the top left of the screen and select Applications. Select applications folder and look for Osiris virus or any other suspicious software. Now right click on every of such entries and select Move to Trash, then right click the Trash icon and select Empty Trash.

Step 2. Delete Osiris virus from your browsers

• Internet Explorer
• Chrome
• Firefox
• Safari

Terminate the unwanted extensions from Internet Explorer

1. Tap the Gear icon and go to Manage Add-ons.
2. Pick Toolbars and Extensions and eliminate all suspicious entries (other than Microsoft, Yahoo, Google, Oracle or Adobe)
3. Leave the window.

Change Internet Explorer homepage if it was changed by virus:

1. Tap the gear icon (menu) on the top right corner of your browser and click Internet Options.
2. In General Tab remove malicious URL and enter preferable domain name. Press Apply to save changes.

Reset your browser

1. Click the Gear icon and move to Internet Options.
2. Open the Advanced tab and press Reset.
3. Choose Delete personal settings and pick Reset one more time.
4. Tap Close and leave your browser.
5. If you were unable to reset your browsers, employ a reputable anti-malware and scan your entire computer with it.

Erase Osiris virus from Google Chrome

1. Access menu (top right corner of the window) and pick Settings.
2. Choose Extensions.
3. Eliminate the suspicious extensions from the list by clicking the Trash bin next to them.
4. If you are unsure which extensions to remove, you can disable them temporarily.

Reset Google Chrome homepage and default search engine if it was hijacker by virus

1. Press on menu icon and click Settings.
2. Look for the “Open a specific page” or “Set Pages” under “On start up” option and click on Set pages.
3. In another window remove malicious search sites and enter the one that you want to use as your homepage.
4. Under the Search section choose Manage Search engines. When in Search Engines..., remove malicious search websites. You should leave only Google or your preferred search name.
   

Reset your browser

1. If the browser still does not work the way you prefer, you can reset its settings.
2. Open menu and navigate to Settings.
3. Press Reset button at the end of the page.
4. Tap Reset button one more time in the confirmation box.
5. If you cannot reset the settings, purchase a legitimate anti-malware and scan your PC.

Remove Osiris virus from Mozilla Firefox

1. In the top right corner of the screen, press menu and choose Add-ons (or tap Ctrl+Shift+A simultaneously).
2. Move to Extensions and Add-ons list and uninstall all suspicious and unknown entries.

Change Mozilla Firefox homepage if it was changed by virus:

1. Tap on the menu (top right corner), choose Options.
2. On General tab delete malicious URL and enter preferable website or click Restore to default.
3. Press OK to save these changes.

Reset your browser

1. Open the menu and tap Help button.
2. Select Troubleshooting Information.
3. Press Refresh Firefox.
4. In the confirmation box, click Refresh Firefox once more.
5. If you are unable to reset Mozilla Firefox, scan your entire computer with a trustworthy anti-malware.

Uninstall Osiris virus from Safari (Mac OS X)

1. Access the menu.
2. Pick Preferences.
3. Go to the Extensions Tab.
4. Tap the Uninstall button next to the undesirable Osiris virus and get rid of all the other unknown entries as well. If you are unsure whether the extension is reliable or not, simply uncheck the Enable box in order to disable it temporarily.
5. Restart Safari.

Reset your browser

1. Tap the menu icon and choose Reset Safari.
2. Pick the options which you want to reset (often all of them are preselected) and press Reset.
3. If you cannot reset the browser, scan your whole PC with an authentic malware removal software.