The malware known as Youhau is a type of ransomware that carries out data encryption, modifies filenames, and generates a ransom note. When Youhau Ransomware infects a victim's system, it alters the names of files by appending certain elements to them. These elements include the victim's ID, a specific email address ('firstname.lastname@example.org'), and the '.youhau' extension. For example, a file that was originally named '1.png' would be changed to '1.png.MJ-MI1657895312.youhau.' Infosec researchers have also confirmed that Youhau Ransomware is part of the VoidCrypt malware variants.
Youhau Ransomware Takes Victims' Files Hostage
The ransom note that victims receive when their files have been encrypted by the Youhau Ransomware contains the demands of the threat actors. The note informs the victim that their files have been encrypted using a cryptography algorithm, rendering them inaccessible without the decryption key. It also cautions victims against attempting to rename or modify the files or using third-party apps or recovery tools.
Furthermore, the ransom note warns against reinstalling the operating system, as this may result in losing the key file and permanently losing access to the encrypted files. Victims are instructed to send a test file and the key file from their system's 'C:/ProgramData' folder to one of the provided email addresses ('email@example.com' or 'firstname.lastname@example.org').
In general, ransomware attacks often demand a ransom from victims in exchange for the decryption of the affected files. However, it is worth noting that victims may be able to recover their files without paying a ransom if they have a backup or if a reliable third-party decryption tool is available online. Paying the ransom is not recommended as it may lead to scams, where the cybercriminals may not provide the decryption key even after receiving payment.
Swift Action Is Crucial Following a Ransomware Attack
A ransomware attack can be a distressing and devastating experience for a victim, as it can result in the loss of valuable personal and business data. To mitigate the potential damage caused by the threat, there are several steps that victims should take.
Firstly, victims should disconnect the infected device from the internet to prevent the further spreading of the ransomware to other devices connected to the same network. It is essential to act quickly in this regard, as some ransomware may have the ability to spread laterally across a network, affecting multiple devices.
It is crucial to then identify the type of ransomware that infected the victim's system. This can help in determining the appropriate recovery strategy and the likelihood of successfully decrypting the files without paying a ransom. Then, use a professional anti-malware solution to remove any malicious threats from the breached device.
Only after the device has been confirmed to be completely clean from malware or unwanted apps should victims attempt to restore the encrypted data. Keep in mind that getting rid of the ransomware threat will not return any of the locked files back to normal. Instead, victims should look for a suitable backup of the affected data. Make sure that the chosen backup has been created before the ransomware threat had infiltrated the device or there is a risk of reintroducing the malware to the system.
The full text of Youhau Ransomware’s message to its victims is:
Your Files Are Has Been Locked
Your Files Has Been Encrypted with cryptography Algorithm
If You Need Your Files And They are Important to You, Dont be shy Send Me an Email
Send Test File + The Key File on Your System (File Exist in C:/ProgramData example : RSAKEY-SE-24r6t523 pr RSAKEY.KEY) to Make Sure Your Files Can be Restored
Get Decryption Tool + RSA Key AND Instruction For Decryption Process
1- Do Not Rename or Modify The Files (You May loose That file)
2- Do Not Try To Use 3rd Party Apps or Recovery Tools ( if You want to do that make an copy from Files and try on them and Waste Your time )
3-Do not Reinstall Operation System(Windows) You may loose the key File and Loose Your Files
Your Case ID :-
OUR Email :email@example.com
in Case of no answer: firstname.lastname@example.org