The fourth version from the dangerous file-locking cryptovirus family
Ransomware family that GandCrab v4 belongs to is known for a long time know, and new versions are raising researchers’ attention with new features. This particular one is using AES-256 and RSA-2048 encryption methods to lock various data on the infected system. Ransomware infections are especially dangerous because of the fact that your files get modified. If you have no backups, this means that you may lose your files. Often ransomware creators write the different code, so files can be encrypted twice. After this, there is no decryption tool that might help. Even the one virus developers allegedly have might not even exist nor help.
During the encryption process photos, videos, documents or other type files get an appendix, in this case .KRAB. This file modification makes your data unreachable and useless. After the successful file encryption, GandCrab v4 ransomware drops CRAB-DECRYPT.txt or KRAB-DECRYPT.txt files on every folder. This is a ransom note, and it contains a ransom message, more details about the attack and ransom payment instructions. As usual to ransomware, this virus demands a ransom in cryptocurrency. You shouldn’t even think about paying the cybercriminals or keeping contact with them. This may be very dangerous.
Silent infiltration gives an opportunity to work in the background
Since GandCrab v4 comes to the system from spam email attachments or poorly protected RDP, it allows virus developers to perform wanted activities while the victim has no idea about it. During this infiltration, ransomware doesn’t need approval from the user. All processes can run without the knowledge of the victim. Especially if this virus is spread with the help of other malware. Trojans or other intruders can be designed to automatically spread ransomware. These are also spread via insecure spam email attachments. Files from these emails can contain malicious script or direct infection and the minute you download this file and open it on your computer, malware starts to work.
If ransomware breaks through unprotected RDP or gets on your system using software vulnerabilities, it also can change significant parts of your operating system. After the infiltration virus scans the system and changes files, blocks or disables certain processes. All this ransomware activity is silent, and the victim is noticing the results after the encryption process when files are locked, and ransom message is displayed. When you are greeted with “Your files are encrypted” message there is no way back. The only solution is to perform a virus removal as soon as possible.
Tips on how to avoid ransomware encryption
The most frustrating thing about the ransomware attack is data locking. If the user is not backing their files, frequently they lose the most import files permanently. Unfortunately, there is a very low possibility that these files can be restored. However, file backing is not the only thing you might do if you want to be prepared for cyber infections. These are the things you need to do if you want to avoid malware attacks:
- Keep your devices up-to-date with the official and latest versions of software and applications. This can help avoid system vulnerabilities.
- Get reputable antivirus and anti-malware programs. Run them occasionally on your device.
- Keep your email and social media accounts protected with complex passwords containing letters in upper and lower cases, numbers.
- Do not visit questionable sites.
- Do not get products from random ads. Especially software and computer optimization tools.
- Be cautious when downloading anything off the internet.
- Always choose Advanced or Custom options during installations.