NOOSE Ransomware

NOOSE is a form of harmful software that shares common characteristics with other ransomware threats. When a computer becomes infected with NOOSE, it encrypts the files on the system, rendering them inaccessible to the user. The threat modifies the file names by appending the '.NOOSE' extension. The compromised device's visual appearance is also altered, with the desktop wallpaper being changed. Alongside these actions, NOOSE generates a text file named 'OPEN_ME.txt,' which contains a ransom note from the attackers.

To illustrate how NOOSE modifies file names, consider the following examples: '1.png' is transformed into '1.png.NOOSE,' '2.pdf' becomes '2.pdf.NOOSE,' and so forth. It is noteworthy that the NOOSE Ransomware is identified as a variant within the Chaos Ransomware family.

The NOOSE Ransomware Attempts to Extort Victims for Money by Taking Data Hostage

The perpetrators behind the NOOSE Ransomware demand a ransom payment, specifically in the form of Monero (XMR), as a condition for providing the decryption software necessary to restore the victim's compromised files. In an attempt to add a layer of legitimacy to their scheme, the attackers identify themselves as the National Office of Security Enforcement (NOOSE), a fictional government agency from the Grand Theft Auto video game, although non-existent in reality. The ransom note provides a detailed set of instructions for the victim to follow, which includes sending an email to a specified address along with their unique ID and a screenshot of the payment transaction.

To instill a sense of urgency, the criminals assure the victim that upon verification of the payment, the decryption software will be promptly delivered. The note also includes additional elements such as a potential discount if the victim contacts the attackers within 24 hours, a cautionary note regarding potential delays in email responses, and a menacing threat of permanent data loss should any attempt to falsify transaction information be detected.

Despite these claims, there are absolutely no guarantees that paying the ransom will result in the delivery of a functional decryption tool. As a result, it is strongly advised against proceeding with such payments. Swift removal of ransomware from compromised computers is essential, as this type of malware has the capability to initiate further encryptions and spread across local networks.

Security experts currently report that the NOOSE Ransomware does not employ double extortion tactics, and its focus seems to be on single machines through drive-by-download social engineering. However, the tactics and infection vectors used by cybercriminals could evolve in the future, highlighting the need for ongoing vigilance and proactive cybersecurity measures.

Essential Measures that can Help You Safeguard Your Devices against Malware and Ransomware Attacks

To safeguard devices against malware and ransomware attacks, users should implement a combination of preventive measures and proactive security practices. Here are crucial measures to enhance device security:

• Use Reliable Anti-malware Software: Install reputable anti-malware software on your device. Keep the security software updated to ensure protection against the latest threats.
•  Regular Software Updates: Keep the operating system, applications, and anti-malware software up to date. Enable automatic updates to patch vulnerabilities and improve security.
•  Exercise Alertness with Email Attachments and Links: Avoid opening emails from unknown or suspicious senders. Do not download attachments or access links from unfamiliar sources. Use email filtering tools to reduce the likelihood of malicious emails reaching your inbox.
•  Backup Important Data: Regularly back up your critical files to an independent device or a secure cloud service. Ensure that backups are stored offline to prevent them from being compromised during an attack.
•  Enable Firewall Protection: Activate the device's built-in firewall or install a reliable third-party firewall. Configure firewall settings to block unauthorized access to your network.
•  Secure Password Habits: Use strong, unique passwords for each account. Consider using a password manager to engender and store complex passwords securely.
•  Stay Informed: Look for the latest cybersecurity threats and trends. Subscribe to security alerts from reputable sources to receive timely information about emerging threats.

By consistently following these measures, users can significantly reduce the possibility of malware and ransomware attacks, creating a more secure computing environment.

Below, you will find the ransom note displayed by the NOOSE Ransomware:

'-----National Office of Security Enforcement [N.O.O.S.E] Report----------

*Introduction:
National Office of Security Enforcement [N.O.O.S.E]
You were infected by a ransomware made by N.O.O.S.E
No need to Google us, we only exist when we want to.

*What happened?
You are infected with the NOOSE ransomware. This version does have an antidot.
Your unique ID is: NOOSEVariant2ID3754865400

*I want my data back:
To get your data back, you need our decryption software. Which only N.O.O.S.E have.
Our software is worth 1540 USD.

*About the decryption software:
To decrypt your files and data you'll need a private key. Without it, you can't have anything back.
Our software uses your safely stored private key to decrypt your precious data.
No other softwares can decrypt your data without the private key.

*Payment currency:
We only accept Monero XMR as a payment method.

*Payment information:
Price: 9.7 XMR
Monero address: 476cVjnoiK2Ghv17CqMQFeuB3NTzJ2X28tfRmWaPyPQgvoHV5cYTKSd7CuF4LZJ76ZcDDt1WZZvpdZDuzbgPBPVs3yBBJ32

*After the payment:
-Send us a mail to malignant@tuta.io in the correct following format:
           -Subject: [Your country name] Device/user name (Example: [USA] John Doe)
           -My unique ID: [Your unique ID].
           -Transaction ID: [Transaction ID] and an attached screenshot of the payment.

*Verification and confirmation:
Once we verify and confirm your payment, we recognize your device and send you the decryption software.

*Important notes:
-We might give you a discount if you contact us within 24 hours.
-Due to our busy emails, we may take up to 24 hours to respond.
-All of our clients got their data back after the payment.
-Failure to write in the correct form will get your mail ignored.
-Any attempt to fake a transaction ID or screenshot will lead to a permanent loss of data
Screenshot of NOOSE's desktop wallpaper:'