JagerDecryptor – this is what victims of the Jager ransomware see after their files have been encoded using a strong AES-256 and RSA-2048 encryption ciphers. This type of ransomware attacks has increased in both numbers and sophistication. The cyber-criminals behind Jager ransomware leave a ransom note asking victims to pay the sum of 100$ to restore their files. After 24 hours the price becomes 150$ and after 48h – 200$. On top of this, the virus threatens to destroy the decryption keys in 72 hours.
Everyone whose computer has been infected by Jager ransomware is advised to immediately remove this virus and try other methods to restore their files instead of paying the ransom. In this article, we have provided more information about this virus as well as instructions on how to remove Jager and try to restore your files.
|Short Description||Jager uses a combination of AES-256 and RSA-2048 ciphers to encrypt the files of victims and ask 100$ for decryption as a payment in BitCoins.|
|Symptoms||The user may witness ransom message in a “Important_Read_Me.html” file which explains that there are 72 hours to pay the ransom otherwise the files will be gone forever.|
|Detection Tool|| See If Your System Has Been Affected by malware |
Malware Removal Tool
|User Experience||Join our forum to Discuss Jager Ransomware.|
How Does Jager Ransomware Spread
Cyber-criminals behind Jager ransomware may use a wide variety of tools to spread this ransomware, hide it from anti-malware software and other functions:
- Obfuscation software.
- File joiners which bundle executables with different scripts.
- Exploit kits to conduct successful infection.
- Spam bots or spam services to spread the file encryption malware.
The most commonly used spam technique is associated with massive spam e-mail campaigns. Such may either contain two types of malicious objects:
Malicious files uploaded as attachments to the e-mail. They may be Microsoft Office documents with malicious macros which are activated after you click on the “Enable Editing” button. They may also be .js files or executables appearing to look like pictures or other types of files.
Malicious web links. They may contain malicious scripts that induce a drive-by download attack. The links may originally appear legitimate, and this is because they are, however, they cause a redirect to the malicious host which infects the computer without the user’s knowledge.
The e-mails sent by cyber-criminals usually appear to resemble messages from legitimate services like PayPal, eBay or other services.
Jager Ransomware – In Depth Analysis
After it has slipped past the defenses of a targeted machine, Jager Ransomware uses advanced techniques to run while being obfuscated and drop its payload. The virus may create files in the following targeted Windows directories:
The files may either have completely random names, names that resemble legitimate programs or their installers and even names which make them seem like legitimate Windows processes in Windows Task Manager, for example, svchost.exe.
After it has dropped its malicious files, Jager ransomware may also create custom values for its encryption file to run on Windows startup. This is achievable by modifying the Run or RunOnce registry keys:
When Jager Ransowmare begins to encipher user files, it scans for a wide variety of file types:
→ .3dm, .3ds, .3g2, .3gp, .7z, .accdb, .aes, .ai, .aif, .apk, .app, .arc, .asc, .asf, .asm, .asp, .aspx, .asx, .avi, .bmp, .brd, .bz2, .c, .cer, .cfg, .cfm, .cgi, .cgm, .class, .cmd, .cpp, .crt, .cs, .csr, .css, .csv, .cue, .db, .dbf, .dch, .dcu, .dds, .dif, .dip, .djv, .djvu, .doc, .docb, .docm, .docx, .dot, .dotm, .dotx, .dtd, .dwg, .dxf, .eml, .eps, .fdb, .fla, .flv, .frm, .gadget, .gbk, .gbr, .ged, .gif, .gpg, .gpx, .gz, .h, .htm, .html, .hwp, .ibd, .ibooks, .iff, .indd, .jar, .java, .jks, .jpg, .js, .jsp, .key, .kml, .kmz, .lay, .lay6, .ldf, .lua, .m, .m3u, .m4a, .m4v, .max, .mdb, .mdf, .mfd, .mid, .mkv, .mml, .mov, .mp3, .mp4, .mpa, .mpg, .ms11, .msi, .myd, .myi, .nef, .note, .obj, .odb, .odg, .odp, .ods, .odt, .otg, .otp, .ots, .ott, .p12, .pages, .paq, .pas, .pct, .pdb, .pdf, .pem, .php, .pif, .pl, .plugin, .png, .pot, .potm, .potx, .ppam, .pps, .ppsm, .ppsx, .ppt, .pptm, .pptx, .prf, .priv, .privat, .ps, .psd, .pspimage, .py, .qcow2, .ra, .rar, .raw, .rm, .rss, .rtf, .sch, .sdf, .sh, .sitx, .sldx, .slk, .sln, .sql, .sqlite, .sqlite, .srt, .stc, .std, .sti, .stw, .svg, .swf, .sxc, .sxd, .sxi, .sxm, .sxw, .tar, .tbk, .tex, .tga, .tgz, .thm, .tif, .tiff, .tlb, .tmp, .txt, .uop, .uot, .vb, .vbs, .vcf, .vcxpro, .vdi, .vmdk, .vmx, .vob, .wav, .wks, .wma, .wmv, .wpd, .wps, .wsf, .xcodeproj, .xhtml, .xlc, .xlm, .xlr, .xls, .xlsb, .xlsm, .xlsx, .xlt, .xltm, .xltx, .xlw, .xml, .yuv, .zip, .zipx, .dat Source: Trendmicro
After encrypting the files, their first 4 bytes of code begins with the indication ! ENC. The ransomware then drops an .HTML file named “Important_Read_Me.html”. It aims to scare the affected user into paying the ransom by giving short deadlines and threatening to destroy any decryption possibilities.
The message is the following:
Jager Ransomware’s Encryption Explained
The encryption algorithms which are being used by Jager ransomware are the following:
- RSA-2048 (Rivest Shamir Adleman).
- AES-256 (Advanced Encryption Standard).
The encryption process is rather sophisticated but to simply explain it, the AES cipher is used to encrypt the files, changing their hex code structure. It may not encrypt the entire file. Instead it may use bits of data which it encodes. This is enough to render the file unusable.
The RSA cipher may then be used to encrypt the AES decryption key which is created after the encryption of the files is done.
The encryption procedure by Jager may look like the sequence in the following image:
Related Article: Ransomware Encryption Explained – Why Is It So Effective?
To decrypt the files, the cyber-criminals use the reverse procedure – they have programmed a decryptor which works with the RSA key which is sent to them. After they upload the files on the decryptor, it simply uses the key, unlocks the file and then it can be used again.
However, if the affected user tries direct decryption by using different factorization methods, it will take an enormous amount of time.
Related Article: Restore Files Encrypted via RSA Encryption
These ciphers (RSA and AES) are some of the top algorithms used by the government to encrypt top secret files and their decryption if you do not know the key may take hundreds of years if your computer does not break by that time.
Remove Jager Ransomware and Try To Restore the Encoded Files
Jager ransomware is a very powerful virus. It may spread even further, and experts strongly advise users to employ a relevant ransomware protection against it. It is also highly recommended not to pay any ransom and wait for a decrypter to be released out to the public which may happen eventually. Malware researchers are constantly analyzing viruses and discovering holes in their code which eventually allow them to create free decryptors.
We advise you to follow the removal instructions below to delete Jager ransomware completely and wait for us to update this article with a decrypter. In the meantime, you may attempt the other methods for file restoration which we have provided in step “3. Restore files encrypted by Jager” below. They may not be 100% successful, but there is a chance you may restore at least some of your files for free which is a good temporary solution until a decryptor is released.
- Guide 1: How to Remove Jager from Windows.
- Guide 2: Get rid of Jager from Mac OS X.
- Guide 3: Remove Jager from Google Chrome.
- Guide 4: Erase Jager from Mozilla Firefox.
- Guide 5: Uninstall Jager from Microsoft Edge.
- Guide 6: Remove Jager from Safari.
- Guide 7: Eliminate Jager from Internet Explorer.
How to Remove Jager from Windows.
Step 1: Boot Your PC In Safe Mode to isolate and remove Jager
Step 2: Uninstall Jager 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.
Step 3: Clean any registries, created by Jager on your computer.
The usually targeted registries of Windows machines are the following:
You can access them by opening the Windows registry editor and deleting any values, created by Jager there. This can happen by following the steps underneath:
Get rid of Jager from Mac OS X.
Step 1: Uninstall Jager and remove related files and objects
1. Hit the ⇧+⌘+U keys to open Utilities. Another way is to click on “Go” and then click “Utilities”, like the image below shows:
- 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 Jager 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:
You can repeat the same procedure with the following other Library directories:
Tip: ~ is there on purpose, because it leads to more LaunchAgents.
Step 2: Scan for and remove malware from your Mac
When you are facing problems on your Mac as a result of unwanted scripts, programs and malware, the recommended way of eliminating the threat is by using an anti-malware program. Combo Cleaner offers advanced security features along with other modules that will improve your Mac’s security and protect it in the future.
Remove Jager from Google Chrome.
Step 1: Start Google Chrome and open the drop menu
Step 2: Move the cursor over "Tools" and then from the extended menu choose "Extensions"
Step 3: From the opened "Extensions" menu locate the unwanted extension and click on its "Remove" button.
Step 4: After the extension is removed, restart Google Chrome by closing it from the red "X" button at the top right corner and start it again.
Erase Jager from Mozilla Firefox.
Step 1: Start Mozilla Firefox. Open the menu window
Step 2: Select the "Add-ons" icon from the menu.
Step 3: Select the unwanted extension and click "Remove"
Step 4: After the extension is removed, restart Mozilla Firefox by closing it from the red "X" button at the top right corner and start it again.
Uninstall Jager from Microsoft Edge.
Step 1: Start Edge browser.
Step 2: Open the drop menu by clicking on the icon at the top right corner.
Step 3: From the drop menu select "Extensions".
Step 4: Choose the suspected malicious extension you want to remove and then click on the gear icon.
Step 5: Remove the malicious extension by scrolling down and then clicking on Uninstall.
Remove Jager from Safari.
Step 1: Start the Safari app.
Step 2: After hovering your mouse cursor to the top of the screen, click on the Safari text to open its drop down menu.
Step 3: From the menu, click on "Preferences".
Step 4: After that, select the 'Extensions' Tab.
Step 5: Click once on the extension you want to remove.
Step 6: Click 'Uninstall'.
A pop-up window will appear asking for confirmation to uninstall the extension. Select 'Uninstall' again, and the Jager will be removed.
Eliminate Jager from Internet Explorer.
Step 1: Start Internet Explorer.
Step 2: Click on the gear icon labeled 'Tools' to open the drop menu and select 'Manage Add-ons'
Step 3: In the 'Manage Add-ons' window.
Step 4: Select the extension you want to remove and then click 'Disable'. A pop-up window will appear to inform you that you are about to disable the selected extension, and some more add-ons might be disabled as well. Leave all the boxes checked, and click 'Disable'.
Step 5: After the unwanted extension has been removed, restart Internet Explorer by closing it from the red 'X' button located at the top right corner and start it again.