Nemucod Ransomware

Nemucod Ransomware Description

The Nemucod Ransomware is a variant of the Nemucod family that includes a ransomware component. The Nemucod is a well-known threat family composed by threatening Java scripts. A variant of the Nemucod downloads a variant of TeslaCrypt, referred to by malware researchers as the Nemucod Ransomware. The Nemucod Ransomware poses a real threat to computer users, and steps should be taken to ensure that your machine is not vulnerable to threats like the Nemucod Ransomware.

The Damage that may be Caused by a Code-Based Ransomware

These Nemucod variants include code that allows them to drop ransomware on an affected computer. The Nemucod Ransomware may be distributed using spam email messages that contain encrypted JavaScript attachments. When the JavaScript is decrypted, it tries to download a corrupted file. This file is a threatening executable file for the Nemucod Ransomware which will try to encrypt the victim's files. After the Nemucod Ransomware has finished encrypting the victim's files, it drops a ransom note in the form of a text file with instructions on carrying out payment. The Nemucod Ransomware, like other encryption ransomware Trojans, searches for files of a certain type on the victim's computer and then encrypts them. The Nemucod Ransomware targets documents, media files, images and other files. After a file is encrypted, the Nemucod Ransomware changes its extension to '.crypted,' making it clear that the Nemucod Ransomware is a variant of TrueCrypt. The Nemucod Ransomware encompasses two infections in one; after it has completed its attack, the Nemucod Ransomware will connect to a remote server and download additional threats on the victim's computer.

Good and Bad News Related to the Nemucod Ransomware

The good news about the Nemucod Ransomware is that the Nemucod Ransomware does not use RSA-1024 encryption, like more sophisticated ransomware Trojans. The Nemucod Ransomware only encrypts the first 2048 bytes of each file using the XOR encryption and a pre-defined key that is embedded in the corrupted executable file. However, even though it is relatively simple, the Nemucod Ransomware can still encrypt the victim's files. The Nemucod Ransomware serves as a successful amalgamation of encryption ransomware Trojans with the pre-existing family of JavaScript Trojans. This is possibly bad news since it's likely that the people responsible for the Nemucod Ransomware and other the Nemucod threats may be planning to increase the severity of these attacks.

Additional Information Regarding the Nemucod Ransomware

Our PC security researchers have observed that the Nemucod Ransomware is very similar to the KeyBTC Ransomware. However, the Nemucod Ransomware seems to be a simpler implementation of this ransomware Trojan's component. It is currently unknown if there is a direct relationship between the people responsible for the Nemucod Ransomware and the KeyBTC Ransomware, or if they simply copied the code from one to the other. Fortunately for computer users, the Nemucod Ransomware uses the XOR encryption, meaning that it is possible to decrypt the files without having to obtain the decryption key from the threat's creators. If your files have been encrypted by the Nemucod Ransomware, PC security researchers recommend the following measures to help with recovery:

  • Files encrypted by the Nemucod Ransomware can be recovered with the XOR key that is embedded in the threat executable (a 255 character key). It is possible that a decryption utility has been made available by security researchers.
  • Affected PCs can be restored using System Restore, which is usually disabled by more sophisticated ransomware Trojan variants.
  • Files encrypted by the Nemucod Ransomware can be restored using Shadow Volume copies, which are deleted by more advanced ransomware Trojans. To do this, it may be necessary to download and run a Shadow Volume browser or recovery utility that can find the shadow copies of files that were encrypted.

Do You Suspect Your PC May Be Infected with Nemucod Ransomware & Other Threats? Scan Your PC with SpyHunter

SpyHunter is a powerful malware remediation and protection tool designed to help provide PC users with in-depth system security analysis, detection and removal of a wide range of threats like Nemucod Ransomware as well as a one-on-one tech support service. Download SpyHunter's FREE Malware Remover
Note: SpyHunter's scanner is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter's malware removal tool to remove the malware threats. Read more on SpyHunter. Free Remover allows you to run a one-off scan and receive, subject to a 48-hour waiting period, one remediation and removal. Free Remover subject to promotional details and Special Promotion Terms. To understand our policies, please also review our EULA, Privacy Policy and Threat Assessment Criteria. If you no longer wish to have SpyHunter installed on your computer, follow these steps to uninstall SpyHunter.

Security Doesn't Let You Download SpyHunter or Access the Internet?

Solutions: Your computer may have malware hiding in memory that prevents any program, including SpyHunter, from executing on your computer. Follow to download SpyHunter and gain access to the Internet:
  • Use an alternative browser. Malware may disable your browser. If you're using IE, for example, and having problems downloading SpyHunter, you should open Firefox, Chrome or Safari browser instead.
  • Use a removable media. Download SpyHunter on another clean computer, burn it to a USB flash drive, DVD/CD, or any preferred removable media, then install it on your infected computer and run SpyHunter's malware scanner.
  • Start Windows in Safe Mode. If you can not access your Window's desktop, reboot your computer in "Safe Mode with Networking" and install SpyHunter in Safe Mode.
  • IE Users: Disable proxy server for Internet Explorer to browse the web with Internet Explorer or update your anti-spyware program. Malware modifies your Windows settings to use a proxy server to prevent you from browsing the web with IE.
If you still can't install SpyHunter? View other possible causes of installation issues.

Technical Information

File System Details

Nemucod Ransomware creates the following file(s):
# File Name Size MD5 Detection Count
1 %LOCALAPPDATA%\Uxtqmedia\c0fde8fd84767083f1facce2c3cc5316.exe 167,936 c0fde8fd84767083f1facce2c3cc5316 91
2 %TEMP%a2.exe 118,124 4d0f490e3e21bef1c6f0c6fa93de90ed 44
3 %SystemDrive%\Users\pegiowachini\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nuke.jse 390,408 f6e251aefb5d094c71511c4210fe9fcd 2
4 file.js 9,176 ba44cb88fb6b3d68a0198ad29ad9f27b 0
More files

Registry Details

Nemucod Ransomware creates the following registry entry or registry entries:
Regexp file mask
%APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup\adobe[RANDOM CHARACTERS]upd.jse
%APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup\def.jse
%APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup\fb.jse
%APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup\mn.jse
%APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup\nuke.jse
%APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup\skype_upd.jse
%APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup\xer64x.jse
Directory
%LOCALAPPDATA%\Upkfmedia
%UserProfile%\Local Settings\Application Data\Upkfmedia

Related Posts

Site Disclaimer

Enigmasoftware.com is not associated, affiliated, sponsored or owned by the malware creators or distributors mentioned on this article. This article should NOT be mistaken or confused in being associated in any way with the promotion or endorsement of malware. Our intent is to provide information that will educate computer users on how to detect, and ultimately remove, malware from their PC with the help of SpyHunter and/or manual removal instructions provided on this article.

This article is provided "as is" and to be used for educational information purposes only. By following any instructions on this article, you agree to be bound by the disclaimer. We make no guarantees that this article will help you completely remove the malware threats on your PC. Spyware changes regularly; therefore, it is difficult to fully clean an infected machine through manual means.

Leave a Reply

Please DO NOT use this comment system for support or billing questions. For SpyHunter technical support requests, please contact our technical support team directly by opening a customer support ticket via your SpyHunter. For billing issues, please refer to our "Billing Questions or Problems?" page. For general inquiries (complaints, legal, press, marketing, copyright), visit our "Inquiries and Feedback" page.