Article designed to help you get rid of the ransomware virus, known as Kasiski which uses [KASISKI] prefix after it encrypts files.
A ransomware virus, called [KASISKI] ransomware has been reported to demand victims to pay $500 to get files encrypted by this virus. The ransomware is operating in both 64 as well as 32 bit Windows operating systems. [KASISKI] ransomware also drops a INSTRUCCIONES.txt file in which the developers of the virus clearly demand the victim to pay a hefty fee to get the files back. In case you have become a victim of this ransomware infection, advices are to read this article and learn how to remove [KASISKI] from your computer and hopefully restore the files that have been encrypted by the virus.
Threat Summary
| Name |
[KASISKI] Virus |
| Type | Ransomware |
| Short Description | The malware encrypts users files using a strong encryption algorithm, making direct decryption possible only via a unique decryption key available to the cyber-criminals. |
| Symptoms | The user may witness ransom notes and “instrucciones.txt” having instructions on how to pay $500 to get the files back. The prefix [KASISKI] has been used. |
| Distribution Method | Via an Exploit kit, Dll file attack, malicious JavaScript or a drive-by download of the malware itself in an obfuscated manner. |
| Detection Tool |
See If Your System Has Been Affected by malware
Download
Malware Removal Tool
|
| User Experience | Join our forum to Discuss [KASISKI] Virus. |
| Data Recovery Tool | Windows Data Recovery by Stellar Phoenix Notice! This product scans your drive sectors to recover lost files and it may not recover 100% of the encrypted files, but only few of them, depending on the situation and whether or not you have reformatted your drive. |
[KASISKI] Ransomware – How Does It Spread
In order for this virus to infect unsuspecting users it may use e-mails with deceptive content. Since the malware attacks primarily Spanish speakers, the e-mails may be written in the same language too.
In the e-mails with which [KASISKI] ransomware may infect a computer, there may be either malicious e-mail attachments or web links, if the e-mail provider hasn’t blocked them. Those contain malicious code In them and after either opening an attachment or clicking on a link, believing they are legitimate documents or websites. Usually they are accompanied by deceitful messages that are primarily focused on getting the user to do what is asked. Some of the e-mails may even pretend to be an automated response of an e-mail with an invoice and fool the user that something is purchased in his name. Once these e-mail attachments or web links are opened, the virus begins to immediately download the payload on the infected machine.
[KASISKI] Ransomware – Further Details
The payload of the [KASISKI] infection has been reported to be named as the following:
- Kasiski.exe(malicious executable)
- Wpm.jpg(Wallpaper)
- INSTRUCCIONES.txt(Ransom note file)
After this has been done, the virus may modify the registry entries of the affected computer only to get kasiski.exe to run on system start. The usual sub-keys in the Windows Registry editor for this purpose are the following:
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
After the malicious executable of [KASISKI] Ransomware has been ran, the virus may begin scanning to encrypt files of the following file types:
→ “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 .DOCX .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”Source:fileinfo.com
After the encryption process has been completed, the files appear to look the same, however, cannot be opened and have the [KASISKI] prefix written on them. They may appear like the following:
After the encryption process has completeted, a ransom note, named “INSTRUCCIONES.txt” and a wallpaper appear. They both have the same message:
→ “TODOS SUS ARCHIVOS FUERON ENCRYPTADOS
PARA RECUPERARLOS ABRA EL DOCUMENTO
‘INSTRUCCiONES.txt’ QUE SE ENCUENTRA EN SU
ESCRITORIO Y SIGA LAS INSTRUCCIONES QUE ALI…
Información importante
Este es su numero personal (NO LO BORRE) =
Todos sus archivos fueron ecnryptados (bloqueados).
Para restaurar sus archivos usted necesita un (DECRYPT TOOL)
Nosotros le ofrecemos el (DECRYPT TOOL) para restaurar sus archivos, su costo es de ($500) quinie”
Judging by the ransom note, the cyber-criminals want the victims to purchase a decryptor, which is most likely a tool that contains the unlock key generated after the encryption process has complete. Since often those tools may not decrypt your files even after paying the ransom, experts strongly advise against paying.
Remove [KASISKI] Ransomware and Restore Your Data
For the removal process of this ransomware infection, malware researchers often advise using powerful anti-malware tool, which will help detect all associated objects with this virus and remove them automatically. In case you have experience you can follow the manual malware removal instructions below, but if you haven’t done this before, we recommend the automatic approach underneath.
After having removed [KASISKI] ransomware from your computer systems, it is time to think about the files. There are numerous methods to restore deleted or corrupted files and we have suggested some of them in step “2. Restore files encrypted by [KASISKI]” below. They may not be 100 percent guaranteed, however may help restore at least some of your files. Also, before trying them, we advise backing up your encrypted files, just in case.
Ventsislav Krastev
Ventsislav is a cybersecurity expert at SensorsTechForum since 2015. He has been researching, covering, helping victims with the latest malware infections plus testing and reviewing software and the newest tech developments. Having graduated Marketing as well, Ventsislav also has passion for learning new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management, Network Administration and Computer Administration of System Applications, he found his true calling within the cybersecrurity industry and is a strong believer in the education of every user towards online safety and security.
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Step 1: Scan for [KASISKI] Virus with SpyHunter Anti-Malware Tool
Ransomware Automatic Removal - Video Guide
Step 2: Uninstall [KASISKI] Virus and related malware 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. To do that:
Follow the instructions above and you will successfully delete most unwanted and malicious programs.
Step 3: Clean any registries, created by [KASISKI] Virus on your computer.
The usually targeted registries of Windows machines are the following:
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
You can access them by opening the Windows registry editor and deleting any values, created by [KASISKI] Virus there. This can happen by following the steps underneath:
Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.
Before starting "Step 4", please boot back into Normal mode, in case you are currently in Safe Mode.
This will enable you to install and use SpyHunter 5 successfully.
Step 4: Boot Your PC In Safe Mode to isolate and remove [KASISKI] Virus
Step 5: Try to Restore Files Encrypted by [KASISKI] Virus.
Method 1: Use STOP Decrypter by Emsisoft.
Not all variants of this ransomware can be decrypted for free, but we have added the decryptor used by researchers that is often updated with the variants which become eventually decrypted. You can try and decrypt your files using the instructions below, but if they do not work, then unfortunately your variant of the ransomware virus is not decryptable.
Follow the instructions below to use the Emsisoft decrypter and decrypt your files for free. You can download the Emsisoft decryption tool linked here and then follow the steps provided below:
1 Right-click on the decrypter and click on Run as Administrator as shown below:
2. Agree with the license terms:
3. Click on "Add Folder" and then add the folders where you want files decrypted as shown underneath:
4. Click on "Decrypt" and wait for your files to be decoded.
Note: Credit for the decryptor goes to Emsisoft researchers who have made the breakthrough with this virus.
Method 2: Use data recovery software
Ransomware infections and [KASISKI] Virus aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.
Simply click on the link and on the website menus on the top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.
[KASISKI] Virus-FAQ
What is [KASISKI] Virus Ransomware?
[KASISKI] Virus is a ransomware infection - the malicious software that enters your computer silently and blocks either access to the computer itself or encrypt your files.
Many ransomware viruses use sophisticated encryption algorithms to make your files inaccessible. The goal of ransomware infections is to demand that you pay a ransom payment to get access to your files back.
What Does [KASISKI] Virus Ransomware Do?
Ransomware in general is a malicious software that is designed to block access to your computer or files until a ransom is paid.
Ransomware viruses can also damage your system, corrupt data and delete files, resulting in the permanent loss of important files.
How Does [KASISKI] Virus Infect?
Via several ways.[KASISKI] Virus Ransomware infects computers by being sent via phishing emails, containing virus attachment. This attachment is usually masked as an important document, like an invoice, bank document or even a plane ticket and it looks very convincing to users.
Another way you may become a victim of [KASISKI] Virus is if you download a fake installer, crack or patch from a low reputation website or if you click on a virus link. Many users report getting a ransomware infection by downloading torrents.
How to Open .[KASISKI] Virus files?
You can't without a decryptor. At this point, the .[KASISKI] Virus files are encrypted. You can only open them once they are decrypted using a specific decryption key for the particular algorithm.
What to Do If a Decryptor Does Not Work?
Do not panic, and backup the files. If a decryptor did not decrypt your .[KASISKI] Virus files successfully, then do not despair, because this virus is still new.
Can I Restore ".[KASISKI] Virus" Files?
Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore .[KASISKI] Virus files.
These methods are in no way 100% guaranteed that you will be able to get your files back. But if you have a backup, your chances of success are much greater.
How To Get Rid of [KASISKI] Virus Virus?
The safest way and the most efficient one for the removal of this ransomware infection is the use a professional anti-malware program.
It will scan for and locate [KASISKI] Virus ransomware and then remove it without causing any additional harm to your important .[KASISKI] Virus files.
Can I Report Ransomware to Authorities?
In case your computer got infected with a ransomware infection, you can report it to the local Police departments. It can help authorities worldwide track and determine the perpetrators behind the virus that has infected your computer.
Below, we have prepared a list with government websites, where you can file a report in case you are a victim of a cybercrime:
Cyber-security authorities, responsible for handling ransomware attack reports in different regions all over the world:
Germany - Offizielles Portal der deutschen Polizei
United States - IC3 Internet Crime Complaint Centre
United Kingdom - Action Fraud Police
France - Ministère de l'Intérieur
Italy - Polizia Di Stato
Spain - Policía Nacional
Netherlands - Politie
Poland - Policja
Portugal - Polícia Judiciária
Greece - Cyber Crime Unit (Hellenic Police)
India - Mumbai Police - CyberCrime Investigation Cell
Australia - Australian High Tech Crime Center
Reports may be responded to in different timeframes, depending on your local authorities.
Can You Stop Ransomware from Encrypting Your Files?
Yes, you can prevent ransomware. The best way to do this is to ensure your computer system is updated with the latest security patches, use a reputable anti-malware program and firewall, backup your important files frequently, and avoid clicking on malicious links or downloading unknown files.
Can [KASISKI] Virus Ransomware Steal Your Data?
Yes, in most cases ransomware will steal your information. It is a form of malware that steals data from a user's computer, encrypts it, and then demands a ransom in order to decrypt it.
In many cases, the malware authors or attackers will threaten to delete the data or publish it online unless the ransom is paid.
Can Ransomware Infect WiFi?
Yes, ransomware can infect WiFi networks, as malicious actors can use it to gain control of the network, steal confidential data, and lock out users. If a ransomware attack is successful, it could lead to a loss of service and/or data, and in some cases, financial losses.
Should I Pay Ransomware?
No, you should not pay ransomware extortionists. Paying them only encourages criminals and does not guarantee that the files or data will be restored. The better approach is to have a secure backup of important data and be vigilant about security in the first place.
What Happens If I Don't Pay Ransom?
If you don't pay the ransom, the hackers may still have access to your computer, data, or files and may continue to threaten to expose or delete them, or even use them to commit cybercrimes. In some cases, they may even continue to demand additional ransom payments.
Can a Ransomware Attack Be Detected?
Yes, ransomware can be detected. Anti-malware software and other advanced security tools can detect ransomware and alert the user when it is present on a machine.
It is important to stay up-to-date on the latest security measures and to keep security software updated to ensure ransomware can be detected and prevented.
Do Ransomware Criminals Get Caught?
Yes, ransomware criminals do get caught. Law enforcement agencies, such as the FBI, Interpol and others have been successful in tracking down and prosecuting ransomware criminals in the US and other countries. As ransomware threats continue to increase, so does the enforcement activity.
About the [KASISKI] Virus Research
The content we publish on SensorsTechForum.com, this [KASISKI] Virus how-to removal guide included, is the outcome of extensive research, hard work and our team’s devotion to help you remove the specific malware and restore your encrypted files.
How did we conduct the research on this ransomware?
Our research is based on an independent investigation. We are in contact with independent security researchers, and as such, we receive daily updates on the latest malware and ransomware definitions.
Furthermore, the research behind the [KASISKI] Virus ransomware threat is backed with VirusTotal and the NoMoreRansom project.
To better understand the ransomware threat, please refer to the following articles which provide knowledgeable details.
As a site that has been dedicated to providing free removal instructions for ransomware and malware since 2014, SensorsTechForum’s recommendation is to only pay attention to trustworthy sources.
How to recognize trustworthy sources:
- Always check "About Us" web page.
- Profile of the content creator.
- Make sure that real people are behind the site and not fake names and profiles.
- Verify Facebook, LinkedIn and Twitter personal profiles.