How to uninstall Jenkins ransomware?

Also Known As: Jenkins virus
Distribution: Moderate
Damage level: Medium

Jenkins ransomware removal instructions

What is Jenkins?

Jenkins ransomware is designed to encrypt files and change their filenames by appending the ".jenkins" extension to them. For example, it changes a file named "sample.jpg" to "sample.jpg.jenkins", and so on. Also, it creates a text file (ransom note) named "!READ_ME.txt", it contains instructions on how to contact cyber criminals who designed Jenkins.

Victims are instructed to contact cyber criminals behind Jenkins (its developers) via jenkins0ran@countermail.com or jenkins0ran@cock.li email address. According to them, if contacted on the same day as files were encrypted, they will decrease size of a ransom by 20%. Typically, ransomware-type programs encrypt files with strong encryption algorithms so that victims could not recover (decrypt them) without tools that can be provided only by cyber criminals who developed that ransomware. Also, cyber criminals often offer a free decryption of some files. In this case they offer to decrypt up to two files. Nevertheless, it is quite common for victims who pay a ransom to get scammed. Simply said, they do not receive decryption tool and/or key even if they pay for it. Since there are no free tools that could decrypt files encrypted by Jenkins, the only way to recover them without risking to be scammed and having to pay money (typically, in cryptocurrency) is to restore them from a backup. It is worth mentioning that uninstallation of ransomware does not help to recover files, it only prevents ransomware from causing further encryptions.

Screenshot of a message encouraging users to pay a ransom to decrypt their compromised data:

Jenkins decrypt instructions (!READ_ME.txt)

A couple of other examples of software of this type are Afrodita, BitPyLock and Kangaroo. Typically, they are designed to prevent victims from accessing their files unless a ransom is paid. Two main (and most common) differences are price of a decryption and cryptographic algorithm (symmetric or asymmetric) that ransomware uses to encrypt data. In most cases it is impossible to decrypt files without the right tool and/or key and cyber criminals who designed ransomware are the only ones who have it. Usually it is possible only if a ransomware has some vulnerabilities (bugs, flaws), it is not fully developed. As a rule, victims can avoid data and financial loss only if they have a backup of their data. That is why it is important to always have a backup of data keep it stored on unplugged storage device and/or remote server like Cloud.

How did ransomware infect my computer?

In most cases cyber criminals proliferate ransomware (and other malicious software) via spam campaigns/emails, Trojans, fake software updaters, various questionable software download sources/channels and software 'cracking' tools. Very often they do that by sending emails that contain malicious attachments or web links that download malicious files. Their main goal is to trick recipients into opening a presented attachment which causes installation of a malicious program. Some examples of files that they often attach to their emails are Microsoft Office, PFF documents, archive files (like RAR, ZIP), executable files (.exe), and JavaScript files. Trojans are malicious programs that cause damage by simply installing some other malware. Simply said, programs of this type are often designed to cause chain infections. Fake (unofficial and unreliable) software updaters usually download and install malicious programs instead of the updating installed software. Also, they might be designed to infect systems by to exploiting bugs, flaws of outdated software that is installed on the operating system. Examples of questionable software download sources areP2P (Peer-to-Peer) networks like torrent clients, eMule, free file hosting websites, freeware download pages, third party downloaders, and other sources of this type. Cyber criminals these channels to upload malicious files that that they disguise as regular, harmless. By downloading opening them users cause computer infections by themselves. Software 'cracking' tools are programs that are being used with an intention to bypass activation of some paid software. However, quite often these tools do not activate software but install some malicious software, e.g., ransomware.

Threat Summary:
Name Jenkins virus
Threat Type Ransomware, Crypto Virus, Files locker
Encrypted Files Extension .jenkins
Ransom Demanding Message !READ_ME.txt
Cyber Criminal Contact jenkins0ran@countermail.com, jenkins0ran@cock.li
Detection Names Avast (Win32:Trojan-gen), BitDefender (Trojan.GenericKD.32892452), ESET-NOD32 (A Variant Of Win32/Filecoder.NXU), Kaspersky (Trojan-Ransom.Win32.Encoder.gry), Full List Of Detections (VirusTotal)
Symptoms Cannot open files stored on your computer, previously functional files now have a different extension (for example, my.docx.locked). A ransom demand message is displayed on your desktop. Cyber criminals demand payment of a ransom (usually in bitcoins) to unlock your files.
Distribution methods Infected email attachments (macros), torrent websites, malicious ads.
Damage All files are encrypted and cannot be opened without paying a ransom. Additional password-stealing trojans and malware infections can be installed together with a ransomware infection.
Removal

To eliminate Jenkins virus our malware researchers recommend scanning your computer with Spyhunter.
▼ Download Spyhunter
Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

How to protect yourself from ransomware infections?

We advise not to open attachments (and web links) that are included in irrelevant emails, especially if such emails are received from unknown, suspicious addresses. All software must be activated (if necessary) and updated using implemented functions and/or tools that are provided by official developers. Other tools might be designed to infect systems with malware. Besides, it is not legal to bypass activation of licensed software with third party, unofficial tools. No software should be downloaded from untrustworthy, unofficial websites, using third party downloaders and other tools of this kind. The safest way to do it is by using official pages and direct download links. One more way to keep computers safe is to regularly scan them for threats with a reputable anti-spyware or antivirus software and always keep it up to date. If your computer is already infected with Jenkins, we recommend running a scan with Spyhunter for Windows to automatically eliminate this ransomware.

Text presented in Jenkins ransomware's text file ("!READ_ME.txt"):

SOMETHING WENT WRONG, PLEASE CONTACT YOUR SYSTEM ADMINISTRATOR!

He can help you to understand whats happened.
If he can't help you, contact us via email:

jenkins0ran@countermail.com
jenkins0ran@cock.li

HURRY UP! WE HAVE ANTIDOTE FOR YOUR FILES! DISCOUNT 20% FOR CLIENTS, WHO CONTACT US IN THE SAME DAY!

You can attach 2 files (text or picture) to check our honest intentions, we will heal them and send  back.
File size not more than 1 Mb and it's should be text or picture, NOT DATABASE.
Fill the following QUESTIONNAIRE and send it in body of your email.

***********************************
QUESTIONNAIRE

Company name: [PUT YOUR COMPANY NAME HERE]
Country: [PUT YOUR COUNTRY HERE]
City: [PUT YOUR CITY HERE]
ID: -
***********************************

We can help you to avoid same issues in future, after heal we will provide advice how to fix security issues on your network.

***********************

Screenshot of files encrypted by Jenkins (".jenkins" extension):

Files encrypted by Jenkins ransomware (.jenkins extension)

Jenkins ransomware removal:

Instant automatic removal of Jenkins virus: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Spyhunter is a professional automatic malware removal tool that is recommended to get rid of Jenkins virus. Download it by clicking the button below:
▼ DOWNLOAD Spyhunter By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

Quick menu:

Step 1

Windows XP and Windows 7 users: Start your computer in Safe Mode. Click Start, click Shut Down, click Restart, click OK. During your computer start process, press the F8 key on your keyboard multiple times until you see the Windows Advanced Option menu, and then select Safe Mode with Networking from the list.

Safe Mode with Networking

Video showing how to start Windows 7 in "Safe Mode with Networking":

Windows 8 users: Start Windows 8 is Safe Mode with Networking - Go to Windows 8 Start Screen, type Advanced, in the search results select Settings. Click Advanced startup options, in the opened "General PC Settings" window, select Advanced startup. Click the "Restart now" button. Your computer will now restart into the "Advanced Startup options menu". Click the "Troubleshoot" button, and then click the "Advanced options" button. In the advanced option screen, click "Startup settings". Click the "Restart" button. Your PC will restart into the Startup Settings screen. Press F5 to boot in Safe Mode with Networking.

Windows 8 Safe Mode with networking

Video showing how to start Windows 8 in "Safe Mode with Networking":

Windows 10 users: Click the Windows logo and select the Power icon. In the opened menu click "Restart" while holding "Shift" button on your keyboard. In the "choose an option" window click on the "Troubleshoot", next select "Advanced options". In the advanced options menu select "Startup Settings" and click on the "Restart" button. In the following window you should click the "F5" button on your keyboard. This will restart your operating system in safe mode with networking.

windows 10 safe mode with networking

Video showing how to start Windows 10 in "Safe Mode with Networking":

Step 2

Log in to the account infected with the Jenkins virus. Start your Internet browser and download a legitimate anti-spyware program. Update the anti-spyware software and start a full system scan. Remove all entries detected.

If you cannot start your computer in Safe Mode with Networking, try performing a System Restore.

Video showing how to remove ransomware virus using "Safe Mode with Command Prompt" and "System Restore":

1. During your computer start process, press the F8 key on your keyboard multiple times until the Windows Advanced Options menu appears, and then select Safe Mode with Command Prompt from the list and press ENTER.

Boot your computer in Safe Mode with Command Prompt

2. When Command Prompt mode loads, enter the following line: cd restore and press ENTER.

system restore using command prompt type cd restore

3. Next, type this line: rstrui.exe and press ENTER.

system restore using command prompt rstrui.exe

4. In the opened window, click "Next".

restore system files and settings

5. Select one of the available Restore Points and click "Next" (this will restore your computer system to an earlier time and date, prior to the Jenkins ransomware virus infiltrating your PC).

select a restore point

6. In the opened window, click "Yes".

run system restore

7. After restoring your computer to a previous date, download and scan your PC with recommended malware removal software to eliminate any remaining Jenkins ransomware files.

To restore individual files encrypted by this ransomware, try using Windows Previous Versions feature. This method is only effective if the System Restore function was enabled on an infected operating system. Note that some variants of Jenkins are known to remove Shadow Volume Copies of the files, so this method may not work on all computers.

To restore a file, right-click over it, go into Properties, and select the Previous Versions tab. If the relevant file has a Restore Point, select it and click the "Restore" button.

Restoring files encrypted by CryptoDefense

If you cannot start your computer in Safe Mode with Networking (or with Command Prompt), boot your computer using a rescue disk. Some variants of ransomware disable Safe Mode making its removal complicated. For this step, you require access to another computer.

To regain control of the files encrypted by Jenkins, you can also try using a program called Shadow Explorer. More information on how to use this program is available here.

shadow explorer screenshot

To protect your computer from file encryption ransomware such as this, use reputable antivirus and anti-spyware programs. As an extra protection method, you can use programs called HitmanPro.Alert and EasySync CryptoMonitor, which artificially implant group policy objects into the registry to block rogue programs such as Jenkins ransomware.

Note that Windows 10 Fall Creators Update includes a "Controlled Folder Access" feature that blocks ransomware attempts to encrypt your files. By default, this feature automatically protects files stored in the Documents, Pictures, Videos, Music, Favorites, and Desktop folders.

Controll Folder Access

Windows 10 users should install this update to protect their data from ransomware attacks. Here is more information on how to get this update and add an additional protection layer from ransomware infections.

HitmanPro.Alert CryptoGuard - detects encryption of files and neutralises any attempts without need for user-intervention:

hitmanproalert ransomware prevention application

Malwarebytes Anti-Ransomware Beta uses advanced proactive technology that monitors ransomware activity and terminates it immediately - before reaching users' files:

malwarebytes anti-ransomware

  • The best way to avoid damage from ransomware infections is to maintain regular up-to-date backups. More information on online backup solutions and data recovery software Here.

Other tools known to remove Jenkins ransomware:

About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

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Malware activity

Global malware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

QR Code
Jenkins virus QR code
A QR code (Quick Response Code) is a machine-readable code which stores URLs and other information. This code can be read using a camera on a smartphone or a tablet. Scan this QR code to have an easy access removal guide of Jenkins virus on your mobile device.
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Platform: Windows

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