The Crypto Locker on Machine: Understanding the Threat and Prevention Methods

In recent years, the crypto locker has become a significant threat to computer systems, with new strains emerging regularly. The primary concern is not only the loss of valuable data but also the financial implications that come with it. In this article, we will delve into the methods used by crypto lockers to infect machines and explore the various safeguards that can be put in place to prevent or limit the effects of these attacks.

Method of Delivery

Most crypto locker infections occur through two primary means: email attachments and Flash ads/banners on websites. The initial infection is often disguised as a legitimate attachment, such as a zip file or an Office document containing macros. Once the user opens the attachment, the malware downloads the Crypto* executable from a central site, bypassing standard email provider blocking mechanisms.

Flash ads and banners have also become a popular means of delivery, as they can be embedded with malicious code that executes when viewed by the user. This method is particularly effective due to its widespread use on the internet.

Severity of Infection

The severity of a Crypto* infection is extremely high, making it essential to employ a multi-layered approach to protecting your network. A single failure in any layer can result in a successful attack, highlighting the importance of having multiple safeguards in place.

GPO for Software Restriction Policies

One effective method of preventing crypto locker infections is through Group Policy Objects (GPOs) for software restriction policies. This setting restricts the execution of unauthorized code on network devices, making it more difficult for malware to spread.

File Screen Rules

Another crucial step in preventing crypto lockers is the implementation of file screen rules for executable files and 'ransom' files created during an attack. These rules can be set up using various security software or operating system features, such as Windows Defender's File and Folder Protection.

Prevention Methods

To prevent or limit the effects of Crypto* infections, it is essential to have a comprehensive plan in place. This includes:

1. Employee Education: Educating employees on the risks associated with crypto locker attacks and how they can be prevented.

2. Regular Software Updates: Ensuring that all software and operating systems are up-to-date with the latest security patches.

3. Firewall Configuration: Configuring firewalls to block suspicious traffic and prevent unauthorized access.

4. Antivirus Software: Installing and regularly updating antivirus software to detect and remove malware.

5. Network Segmentation: Segmenting networks to limit the spread of malware in case of an infection.

Crypto lockers are a significant threat to computer systems, with new strains emerging regularly. By understanding how they work and implementing effective prevention methods, organizations can reduce the risk of successful attacks. Remember, a multi-layered approach is key to protecting your network from crypto locker infections.

Crypto locker on machine