Ryuk ransomware encrypts business data on Windows PCs

Rabia Noureen avatar. By: Rabia Noureen
3 minute read
Ryuk ransomware PC

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Cyber criminals are using a new form of ransomware for targeting large businesses and getting money from them. Since August, the  Ryuk group ended up earning $4 million by installing malicious encryption software on high-value targets.

How Ryuk attacks its victims?

The ransomware named Ryuk ransomware works by encrypting the important data that is available on the network. The attackers then provide the decryption key to users in return for ransom in cryptocurrency.

The attackers usually aim to hack as many machines as possible, but Ryuk ransomware works in a unique way. The way hackers prepare for the strike makes the attack rare and unique in its nature.

The trickbot trojan is first installed on the system. The trojan basically aims to stay on the system for longer periods of time. The organizational network is mapped at the next step, and now the attackers can steal the credentials by compromising the network.

Now one of the two standard ransomware notes is sent to the victim’s system just after compromising the system. The target company is politely advised through the ransom note to decrypt their systems by paying a specific ransom amount in Bitcoin. The message further threatens the victims to destroy all the files if they fails to pay the ransom. Finally, a contact email and a Bitcoin wallet address are shared with the victims.

If the victim ignores the first ransom message the second ransom note is sent to the victim that threatens him about the consequences. It is worth mentioning that the new ransomware is alarming for users and might compel them to pay the ransomware. One half a Bitcoin is added to the amount to be paid with each passing day. The amount to be paid is estimated to be roughly $224,000.

The attackers need to have a clear idea about the financial condition of the target network before launching the attack. The main reason behind implanting Ryuk into the target systems is the identification of the most important computers and datasets.

Experts still don’t have any idea about the origin of Ryuk. Some of the attackers claim it to be from Russia while others are of the view that it’s originally from North Korea.

How to protect your PCs against Ryuk attacks

Several notable attacks have been reported during the past few months. Users should be trained to use an email protection platform that is able to recognize the malicious spams in the first attempt.

Furthermore, these malicious scripts should be stopped from installing on the system by using anti-exploit technology. The companies should also invest in effective security solutions and update them frequently.

Network segmentation is another approach that can be used to reduce the damage from a ransomware attack.

In this way, protection can be provided to stop Ryuk ransomware and hence prevent serious damage to the systems.

First-Aid tools to remove Ryuk and restore data on Windows 10

1. SpyHunter

First of all, we recommend you to use SpyHunter. This is an antimalware tool that is highly effective and is easy to use. It will help you remove Ryuk and will also find other ransomware that was hidden on your PC.

2.  Malwarebytes

Malwarebytes is another tool that is effective against all type of trojans and blocks them immediately, so we suggest you to get a copy or at least a free version in order to scan. The regular antiviruses do not use such ransomware technology as Malwarebytes. This tool is specialized in malware and ransomware, so try it out before all others.

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