What is JSWorm ransomware? And how does it implement its attack?
JSWorm ransomware is a file-encrypting virus designed to lock important files in a computer and demand ransom from victims in exchange for file recovery. This new crypto-malware was discovered in the second half of January 2019 and uses the .JSWORM extension to mark the files it encrypts.
The instant its payload file is dropped in the system, JSWorm will establish a connection to a remote Command and Control server where it downloads its other components and places them on several system folders. These components are then used to execute two modules that will be used for the attack. The first module known as data gathering is the one that collects information from the system. The data obtained is then used for the second module known as stealth protection, combined with the collected data and some components; it is the one that scans the system for strings of any sandbox environment, security and antivirus programs that might interfere with the attack. Afterwards, it modifies some registry keys and sub-keys in the Windows Registry, allowing it to automatically run in every system boot. After all these modifications, JSWorm ransomware will scan the system in search for files with the following extensions:
.PNG .PSD .PSPIMAGE .TGA .THM .TIF .TIFF .YUV .AI .EPS .PS .SVG .INDD .PCT .PDF .XLR .XLS .XLSX .ACCDB .DB .DBF .MDB .PDB .SQL .APK .APP .BAT .CGI .COM .EXE .GADGET .JAR .PIF .WSF .DEM .GAM .NES .ROM .SAV CAD Files .DWG .DXF GIS Files .GPX .KML .KMZ .ASP .ASPX .CER .CFM .CSR .CSS .HTM .HTML .JS .JSP .PHP .RSS .XHTML .DOC .SEON .LOG .MSG .ODT .PAGES .RTF .TEX .TXT .WPD .WPS .CSV .DAT .GED .KEY .KEYCHAIN .PPS .PPT .PPTX .INI .PRF Encoded Files .HQX .MIM .UUE .7Z .CBR .DEB .GZ .PKG .RAR .RPM .SITX .TAR.GZ .ZIP .ZIPX .BIN .CUE .DMG .ISO .MDF .TOAST .VCD SDF .TAR .TAX2014 .TAX2015 .VCF .XML Audio Files .AIF .IFF .M3U .M4A .MID .MP3 .MPA .WAV .WMA Video Files .3G2 .3GP .ASF .AVI .FLV .M4V .MOV .MP4 .MPG .RM .SRT .SWF .VOB .WMV 3D .3DM .3DS .MAX .OBJ R.BMP .DDS .GIF .JPG .CRX .PLUGIN .FNT .FON .OTF .TTF .CAB .CPL .CUR .DESKTHEMEPACK .DLL .DMP .DRV .ICNS .ICO .LNK .SYS .CFG
After it finds its targeted files, JSWorm will encrypt them using the AES cipher and append the .JSWORM extension, signifying that the files are encrypted. Following data encryption, it opens an html file named “JSWORM-DECRYPT.html” which contains the following message:
“ALL YOUR FILES LOCKED!
YOUR PID %HWID%
YOUR PERSONAL EMAIL: [email protected]
Write your ID at title of mail and country at body of mail and wait answer.
You have to pay some bitcoins to unlock your files!
DON’T TRY DECRYPT YOUR FILES!
If you try to unlock your files, you may lose access to them!
No one can guarantee you a 100% unlock except us!
How to buy bitcoin”
How is the malicious payload of JSWorm ransomware disseminated online?
The malicious payload of JSWorm ransomware may be disseminated using several methods. One of the most common methods used is malicious spam email campaigns where crooks attach a file filled with malicious scripts used to launch JSWorm ransomware in the system. In addition, it could also spread by hacking through an unprotected RDP configuration, exploit kits, deceptive downloads, fake software updates, and many more.
Terminate JSWorm ransomware, as well as its malicious processes using the removal instructions laid out below.
Step 1: the first thing you have to do is eliminate the processes of JSWorm ransomware by opening the Task Manager. Just tap Ctrl + Shift + Esc keys to launch the Task Manager.
Step 2: Next, go to the Processes tab and look for the malicious process of JSWorm ransomware named “JSWorm.exe” and then right click on it and select End Process or End Task.
Step 3: Close the Task Manager and open Control Panel by pressing the Windows key + R, then type in “appwiz.cpl” and then click OK or press Enter.
Step 4: Look for dubious programs that might by related to JSWorm ransomware and then Uninstall it/them.
Step 5: Close Control Panel and then tap Win + E to launch File Explorer.
Step 6: After opening File Explorer, navigate to the following directories below and look for JSWorm ransomware’s malicious components such as JSWORM-DECRYPT.html, [random].exe and other suspicious-looking files and then erase them all.
Step 7: Close the File Explorer.
Before you proceed to the next steps below, make sure that you are tech savvy enough to the point where you know exactly how to use and navigate your computer’s Registry. Keep in mind that any changes you make will highly impact your computer. To save you the trouble and time, you can just use [product-name], this system tool is proven to be safe and excellent enough that hackers won’t be able to hack into it. But if you can manage Windows Registry well, then by all means go on to the next steps.
Step 8: Tap Win + R to open Run and then type in regedit in the field and tap enter to pull up Windows Registry.
Step 9: Navigate to the listed paths below and look for the registry keys and sub-keys created by JSWorm ransomware.
- HKEY_CURRENT_USER\Control Panel\Desktop\
- HKEY_USERS\.DEFAULT\Control Panel\Desktop\
Step 10: Delete the registry keys and sub-keys created by JSWorm ransomware.
Step 11: Close the Registry Editor.
Step 12: Empty your Recycle Bin.
Try to recover your encrypted files using their Shadow Volume copies
Restoring your encrypted files using Windows’ Previous Versions feature will only be effective if JSWorm ransomware hasn’t deleted the shadow copies of your files. But still, this is one of the best and free methods there is, so it’s definitely worth a shot.
To restore the encrypted file, right-click on it and select Properties, a new window will pop-up, then proceed to Previous Versions. It will load the file’s previous version before it was modified. After it loads, select any of the previous versions displayed on the list like the one in the illustration below. And then click the Restore button.
Once you’re done executing the steps given above, you need to continue the removal process of JSWorm ransomware using a reliable program like [product-name]. How? Follow the advanced removal steps below.
- Turn on your computer. If it’s already on, you have to reboot it.
- After that, the BIOS screen will be displayed, but if Windows pops up instead, reboot your computer and try again. Once you’re on the BIOS screen, repeat pressing F8, by doing so the Advanced Option shows up.
- To navigate the Advanced Option use the arrow keys and select Safe Mode with Networking then hit
- Windows will now load the Safe Mode with Networking.
- Press and hold both R key and Windows key.
- If done correctly, the Windows Run Box will show up.
- Type in the URL address, [product-url] in the Run dialog box and then tap Enter or click OK.
- After that, it will download the program. Wait for the download to finish and then open the launcher to install the program.
- Once the installation process is completed, run [product-code] to perform a full system scan.
- After the scan is completed click the “Fix, Clean & Optimize Now” button.