The newly released Nemucod ransomware is quit peculiar version that is known to download TeslaCrypt ransomware variant. The components of this ransomware arrives on a targeted computer through a Spam email with a Zip file attachment. The developers of this ransomware virus have used Spam emails as a attack vector which pretends like a fake invoice. The email with strange subject line try to convince users to open ZIP attachment. For distribution of such Spam email the authors of this malware uses email ID of another user and thus it can propagate from one to another online computer to infect as much as possible.
Nemucod ransomware claims that the RSA 1024 file encryption has been used to encrypt files on victims computer. It is a very strong file encryption algorithm that uses public and private RSA decryption key to undo file encryption. To supply decryption key the authors of this ransomware demands a certain amount in bitcoins on specified BTC address. The ransom note is published as “Decrypted.txt” and “.Crypted” file extension is used by this ransomware after file encryption. The good news for victims of Nemucod ransomware which is also known as .Crypted ransomware is that, the ransomware program does not use RSA-1024 in actual file encryption. It only encrypt first 2048 bytes of every file with XOR encryption. So the affected files can be easily decrypted if the user finds 255 characters long XOR key somewhere in downloaded components by Nemucod ransomware. Other manual and automatic methods to remove Nemucod ransomware are further discussed in this post like use of System Restore, Volume Shadow Copies etc.
What To Do If Your PC Get Infected By Nemucod ransomware
The ransomware infection has been mainly designed with the purpose to scare users and trick their money. It take your files on hostage and demand ransom to return your important data. But now the question is what you can do when your system got infected by Nemucod ransomware virus? Here are some option that you can use to get rid of this nasty infection.
Don’t Panic – Well the first thing is Don’t panic and then completely check out your system for any working files. If you got any working files then copy it to USB drive.
Pay Ransom – Other option is you can pay the ransom and wait to get your files back. (really a bad option)
Use Backup – Clean you entire system files, remove the infection completely from your PC and restore your files with any backup.
Remove Infection – You can also delete Nemucod ransomware virus using malware removal tool and remove all the infected files. You can later recover all your data by using any data recovery tool. (In case you don’t have backup of your files.) – Recommended Method.
Reinstall Windows – The last option is reinstall your Windows OS. It will completely remove all your data as well as infection. You will get a completely new infection free PC.
How To Remove Nemucod ransomware Virus From Your PC
Step 1 – Boot your computer in Safe mode.
Step 2 – Remove the infected registry entry files.
- Click Windows Flag and R button together.
- Type “regedit” and click OK button
- Find and delete following entries.
HKEY_CURRENT_USERSoftwareMicrosoftInternet ExplorerMain “Default_Page_URL”
Step 3 – Remove From msconfig
- Click Windows + R buttons simultaneously.
- Type msconfig and press Enter
- Go to Startup tab and uncheck all entries from unknown manufacturer.
Step 4 – Restart your computer normally.
Check your computer now. If the virus has gone then you can start using your computer. If the infection still remains then head to the next step.
Step 5 – System Restore
- Insert Windows installation disk to CD drive and restart your PC.
- While system startup, keep pressing F8 or F12 key to get boot options.
- Now select the boot from CD drive option to start your computer.
- Then after you will get the System Recovery Option on your screen.
- Select the System Restore option from the list.
- Choose a nearest system restore point when your PC was not infected.
- Now follow the option on your screen to Restore your computer.
If the above manual methods didn’t removed Nemucod ransomware virus then you have only option to remove infection using a malware removal tool. It is last and the only option that can easily and safely remove this nasty threat from your computer.
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