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JSE file virus decryption and removal

3 min read
The issue with an unsanctioned change of file format to .jse isn’t trivial, because it most likely means that a ransomware program has entered the computer.

The crypto malware alert du jour has to do with a bevy of user reports about the scrambling of data files on PCs that involves the JSE extension. Whereas it’s premature to accurately affiliate this threat with the existing ransomware families, the undoubted fact is it’s a new campaign aimed at defrauding people of money. The JSE file virus appears to be circulating through several vectors at this point. One is social engineering. The entry point in this case is human gullibility for the most part. The virus operators are leveraging a botnet to produce a large volume of spam. The rogue incoming webmail messages go with attachments, usually ZIP files, which launch the malicious process once extracted through double-clicking on the victim’s end. The other distribution technique occasionally detected by experts involves exploit kits, where Windows computers are compromised via unpatched software vulnerabilities.

JSE file virus displays a warning message during the attack
JSE file virus displays a warning message during the attack

JSE isn’t actually a harmful entity per se. It denotes the ‘JScript Encoded’ file format, a subtype of JavaScript that, ideally, can be processed using a commonplace text editor. The malicious implication, however, isn’t nearly as serene. When the ransomware plague in question attacks a computer and appends the .jse extension to the user’s sensitive files, things get out of hand because the data becomes inaccessible. The offending application takes the personal data lookup task seriously, scanning the entire hard disk for the most popular forms of information. What makes matters worse is that the infection also traverses plugged-in devices and network shares for objects that are likely to be important for the user.

As soon as the database of valuable files is readily available, the JSE ransomware unleashes the crypto part of its hideous feature set. Using a fusion of AES and RSA cryptosystems, it makes sure that the victim’s access to the data is completely blocked. The warped files are easy to tell – they all have the .jse string at the end. The only avenue to undo the damage is the use of the private RSA key, which unfortunately doesn’t reside on the machine. The malware spawns multiple ransom notes on the PC, which explain what happened and advise the person on recovery. In particular, the user is told to submit somewhere around 1 Bitcoin to obtain the unique master key and decrypt the information. Instead of quenching the extortionists’ thirst for easy profit, though, it’s strongly recommended to try a few workarounds first.

Automated removal of JSE file virus

Owing to an up-to-date database of malware signatures and intelligent behavioral detection, the recommended software can quickly locate the infection, eradicate it and remediate all harmful changes. So go ahead and do the following:

1. Download and install the antimalware tool. Open the solution and have it check your PC for PUPs and other types of malicious software by clicking the Start Computer Scan button

Download .jse files virus remover

2. Rest assured the scan report will list all items that may harm your operating system. Select the detected entries and click Fix Threats to get the troubleshooting completed.

Ways of non-ransom recovery of .jse files

Cracking the crypto used by this ransom trojan is more of a science fiction thing rather than an attainable prospect for the masses. This is why the troubleshooting in predicaments of this sort is a matter of two approaches: one is to pay the ransom, which isn’t an option for many victims; and the other is to apply instruments that take advantage of the ransomware’s possible weaknesses. If the latter is your pick, the advice below is a must-try.

Backups can make your day

Not only are you a lucky person in case you’ve been backing up your most important files, but you’re also a wise and prudent user. This isn’t necessarily a resource-heavy activity these days – in fact, some providers of online services are allocating a sufficient size of cloud storage space for free so that every customer can easily upload their critical data without paying a penny. Having removed JSE ransomware, therefore, all you have to do is download your stuff from the remote server or transfer it all from an external piece of hardware if that’s the case.

Restore previous versions of encrypted files

A positive upshot of using this technique depends on whether or not the ransomware has erased the Volume Shadow Copies of the files on your PC. This is a Windows feature that automatically makes and keeps the backups of data elements on the hard drive as long as System Restore is enabled. The cryptoware in question is programmed to switch off the Volume Shadow Copy Service (VSS), but it has reportedly failed to in some cases. Checking one’s options regarding this workaround is doable in two ways: through the Properties menu of each file or by means of the remarkable open-source tool called Shadow Explorer. We recommend the software-based way because it’s automated, hence faster and easier. Just install the app and use its intuitive controls to get previous versions of the encrypted objects reinstated.
Shadow Explorer

Data recovery toolkit to the rescue

Some strains of ransomware are known to delete the original files after the encryption routine has been completed. As hostile as this activity appears, it can play into your hands. There are applications designed to revive the information that was obliterated because of malfunctioning hardware or due to accidental removal. The tool called Data Recovery Pro by ParetoLogic features this type of capability therefore it can be applied in ransom attack scenarios to at least get the most important files back. So download and install the program, run a scan and let it do its job.

Download Data Recovery Pro

Data Recovery Pro

Ransomware Prevention Tips

To avoid the JSE ransomware and other file-encrypting infections in the future, follow several simple recommendations:

  • Toggle your email provider’s anti-spam settings to filter out all the potentially harmful incoming messages. Raising the bar beyond the default protection is an important countermeasure for ransom Trojans

  • Define specific file extension restrictions in your email system. Make sure that attachments with the following extensions are blacklisted: .js, .vbs, .docm, .hta, .exe, .cmd, .scr, and .bat. Also, treat ZIP archives in received messages with extreme caution

  • Rename the vssadmin.exe process so that ransomware is unable to obliterate all Shadow Volume Copies of your files in one shot

  • Keep your Firewall active at all times. It can prevent crypto ransomware from communicating with its C&C server. This way, the threat won’t be able to obtain cryptographic keys and lock your files

  • Back up your files regularly, at least the most important ones. This recommendation is self-explanatory. A ransomware attack isn’t an issue as long as you keep unaffected copies of your data in a safe place

  • Use an effective antimalware suite. There are security tools that identify ransomware-specific behavior and block the infection before it can do any harm.
These techniques are certainly not a cure-all, but they will add an extra layer of ransomware protection to your security setup.

Revise your security status

Post-factum assessment of the accuracy component in malware removal scenarios is a great habit that prevents the comeback of harmful code or replication of its unattended fractions. Make sure you are good to go by running an additional safety checkup.

Download JSE file ransomware removal tool

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