Ransomware: How Ransomware Works & Prevention

What is Ransomware?

Ransomware is a type of malware that prevents users from accessing their system or personal files and requires blackmail to restore access. Some people think that “a virus has blocked my computer”, but ransomware is generally classified as a malicious form and not as a virus.

The first versions of the redemption program were developed in the late 1980s and had to be shipped by paid snails. Today, writers order payments with cryptocurrency or credit cards, while attackers target all kinds of individuals, businesses and organizations. Some emancipated writers sell this service to other cybercriminals known as ransomware as a service.

How Ransomware Works

Infection and Distribution Vectors

Ransomware, like any malware, can gain access to the organization’s system in a variety of ways. However, ransomware operators prefer infection vectors.

One of them is email phishing. A malicious email may contain a link to a site hosting malicious downloads or an attachment that has a built-in download feature. Once the email recipient finds the receipt, the ransomware is downloaded to his computer and completed.

Another popular ransomware carrier uses services such as Remote Desktop Protocol (RDP). With RDP, a person who steals or specifically attacks employee login credentials can use them for authentication and remote access to a corporate network computer. With this access, an attacker can directly download a malicious program and run it on a device under its control.

Others may try to damage systems directly, such as how WannaCry uses EternalBlue weaknesses. Most ransomware variants have multiple vectors of infection.

Data Encryption

Once the ransomware gets access to the system, it can start encrypting its files. Because the encryption feature is built into the operating system, it can only access files, encrypt them with a key controlled by an attacker, and modify encrypted versions of the original. Most of programs are cautious when it comes to encrypting files to ensure system stability. Some options also take steps to back up files and remove shadow copies to complicate recovery without a decryption key.

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Ransom Demand

Once the file encryption is complete, the ransomware program is ready for a ransom claim. Different versions of ransomware do this in many ways, but it is not uncommon to replace scripted documents or screen wallpapers with screen wallpapers placed in each encrypted directory.

Generally, these notes require a certain amount of cryptocurrency instead of accessing the affected files. In the case of ransom, the ransom operator provides a copy of the symmetric cryptographic key used to protect the private key or symmetric cryptographic key. This information is stored in encryption programs (also provided by cybercriminals) that can be used to modify encryption and restore access to user files.

Although all versions of the redemption program have these three basic steps, different redemption programs may have different implementations or additional steps. For example, Maze will scan software options, such as WannaCry ransomware infection and other malicious tools for encryption, such as files, registration information and data theft before encrypting data.

Ransomware Prevention and Detection

Preventing ransomware attacks usually involves backing up and testing as well as protecting ransomware on security devices. Security tools such as email gateways are the first line of protection, but the end-point is the second line of protection. Intrusion detection systems (IDSs) are sometimes used to detect commands and controls that alert the ransomware system that calls the control server. User training is important, but user training is enabled through certain levels of protection and email.

The safest solution, another preventive protection that failed, is the Bitcoin stock. Instant losses that affect a business or a business that affects a customer are common. Hospitals and hospitality businesses are at risk of disrupting the rescue program as they could harm the lives of patients or prevent people from entering or leaving the facility.

Here We Listed some ransomware decryption tools:

  • AES_NI.
  • Alcatraz Locker.
  • Apocalypse.
  • BadBlock.
  • Bart.
  • BigBobRoss.
  • BTCWare.
  • Crypt888.

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