Understanding Ransomware

HOW RANSOMWARE ENCRYPTS FILE

Ransomware encrypts files using AES and RSA Encryptions. What exactly are AES and RSA?

Advanced Encryption Standard (AES) is an encryption algorithm used to prevent data theft and unauthorized access to sensitive information. NSA uses AES to keep their top secrets secure against cyber espionage. In AES, a string is divided into 128 bits per block. Each block is provided with a key. With each round, a ciphertext is generated out of the other encryption keys. Basically, you end up getting all the 128 bits encrypted, making it impossible to crack.

RSA Encryption is an asymmetric encryption system introduced in 1973. It stands for Rivest, Shamir, and Adleman. To cipher a message, it is converted into a number raised to the power of the first number and divided into a constant factor. The standard key length is set to a minimum of 3072 bits because a key length higher than 768 bits is almost impossible to decipher.

This process of converting plaintext to ciphertext combined with malware results in ransomware. That’s how ransomware encrypts files.

Ransomware encrypting files is such an inconvenience both to consumers and companies. If ransomware encrypted your files, considering alternative methods to restore your files is worth a try.

We’ll show you how to recover ransomware encrypted files without having to pay the ransom.

RANSOMWARE FILE RECOVERY

1. https://www.nomoreransom.org


Noransomware.org is a collaboration of different Law enforcement and IT Security companies such as The National High Tech Crime Unit of the Netherlands' police, Europol’s European Cybercrime Centre and McAfee. Their mission is to help the ransomware victims recover files without having to pay up for the decryption keys. Through their hard work, they have already decrypted different types of ransomware. Visit www.nomoreransom.org now to download a decryption key.

2. Ransomware File
recovery Software

File Recovery Software is a tool that allows you to scan a desired hard drive to recover lost files. In an instance that ransomware that encrypted your file is undecryptable, you can download data recovery software for free to recover files.

EaseUS - is one of the best free data recovery software that allows you to recover data for up to 2GB. It deep scans the computer to search for the deleted or encrypted files. Then you can preview the file before recovering it. It allows you to recover various types of files such as jpeg, doc, mp4, mp3, zip, and more.

3. Ransomware File Recovery
from a Shadow Copy

The shadow copy of the operating system allows the user to recover the previous version of the file. However, certain types of ransomware such as TrumpHead ransomware are able to delete the shadow copy of the operating system. Here’s what to do to restore the previous version of the file.

Open the folder that contains the ransomware encrypted file. Right click on the file, click on Properties. When a dialogue box opens, click on the Previous Versions tab. Clicking on the Copy button restores the file to a folder, while the Restore button automatically overwrites the current version of the file. (Choose the desired option.)

Once the files are restored, do not allow ransomware to encrypt your files again. The same type of ransomware can encrypt your files again if you leave the computer unprotected. Both personal and business computers need advanced protection to prevent ransomware infection.

For a business network that allows access to many endpoint devices, advanced endpoint protection is necessary. The internal users are involved in a business operation, keeping their endpoint devices safe is important, as they can be the entry point of ransomware.




WHAT ARE THE RISKS IF YOU DON’T DOWNLOAD a central security software

Comodo Advanced Endpoint Protection is central security software designed primarily to protect the network and endpoint devices. It consists of a multi-layered defense that keeps the endpoint devices secure.

valkyrie cloud-based
verdict platform

Valkyrie - cloud-based verdict platform that uses static and dynamic analysis to identify threats within just 40 seconds. It contains the complete collection of virus signatures and is constantly updated to defend the computer against the latest threats.

host intrusion
prevention system

HIPS - protects the computer memory, the registry, the keyboard, the hard drive against fileless malware. It prevents unauthorized modification and direct access.

auto
containment

Auto-Containment - built upon Default Deny, auto-contains untrusted files when it enters, rendering zero-day day threat on the endpoint devices. It only permits the file in the computer once it is confirmed safe.

remote monitoring
management

RMM (Remote Monitoring Management) - allows remote installation of the software on each endpoint device. It also allows threat reports be transmitted instantly for immediate malware protection.

powerful firewall

Firewall - protects the network against inbound and outbound threat by filtering network traffic and data transmission. It monitors the active applications on the endpoint devices ot prevent the entry of malicious software.


Choose the best for your computer and network. For a personal computer, click here to download Comodo anti malware for free. For a business network, download Comodo Advanced Endpoint Protection to receive complete malware protection for your network and endpoint devices. Comodo Advanced Endpoint Protection consists of multi-layered defense to protect the network and endpoint devices against varieties of malware such as ransomware, trojan, spyware, virus, and worm. Download Comodo Advanced Endpoint Protection today to keep the network and endpoint devices safe from malware attacks



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