Nova

MITRE ATT&CK does not currently catalogue Nova, so this is our assessment of the techniques it uses, drawn from public reporting. The techniques themselves, and every "what that means" definition below, come from MITRE ATT&CK v19.2. Confidence: medium. Treat it as orientation, not attribution.

1. T1059.001 PowerShell Execution

   What they do: nova executes malicious commands via PowerShell scripts to stage payloads and manipulate system processes.

   What that means: Adversaries may abuse PowerShell commands and scripts for execution.

2. T1547.001 Registry Run Keys / Startup Folder PersistencePrivilege Escalation

   What they do: nova modifies registry run keys to ensure malware execution upon system reboot for persistence.

   What that means: Adversaries may achieve persistence by adding a program to a startup folder or referencing it with a Registry run key.

3. T1685 Disable or Modify Tools Defense Impairment

   What they do: nova disables antivirus tools and security software to prevent detection and hinder incident response.

   What that means: Adversaries may disable, degrade, or tamper with security tools or applications (e.g., endpoint detection and response (EDR) tools, intrusion detection systems (IDS), antivirus, logging agents, sensors, etc.) to impair or reduce visibility of defensive capabilities.

4. T1027.016 Junk Code Insertion Stealth

   What they do: nova embeds junk code into its binaries to evade static analysis and signature-based detection.

   What that means: Adversaries may use junk code / dead code to obfuscate a malware’s functionality.

5. T1070.004 File Deletion Stealth

   What they do: nova deletes Volume Shadow Copies and backup directories via command-line utilities to eliminate recovery options.

   What that means: Adversaries may delete files left behind by the actions of their intrusion activity.

6. T1135 Network Share Discovery Discovery

   What they do: nova scans network shares using native tools to identify victim files and expand its foothold.

   What that means: Adversaries may look for folders and drives shared on remote systems as a means of identifying sources of information to gather as a precursor for Collection and to identify potential systems of interest for Lateral Movement.

7. T1021.002 SMB/Windows Admin Shares Lateral Movement

   What they do: nova leverages SMB/Windows Admin Shares for lateral movement across networked systems within the victim environment.

   What that means: Adversaries may use Valid Accounts to interact with a remote network share using Server Message Block (SMB).

8. T1486 Data Encrypted for Impact Impact

   What they do: nova encrypts victim files using symmetric encryption to maximize disruption and ransom demand leverage.

   What that means: Adversaries may encrypt data on target systems or on large numbers of systems in a network to interrupt availability to system and network resources.

9. T1490 Inhibit System Recovery Impact

   What they do: nova executes system recovery inhibition commands to prevent automatic restoration from backups or snapshots.

   What that means: Adversaries may delete or remove built-in data and turn off services designed to aid in the recovery of a corrupted system to prevent recovery.

The note this group leaves on a compromised machine. Click a filename to read it.

----------------------------------------------------------------------------- Ransom -----------------------------------------------------------------------------
-> Hello , without any problems , if you see this Readme its mean you under controll by Nova ransomware , Data stolen and will be leaked if didn't contact us in 48 hours
- encrypted files have ext .[victim_name]NV DON'T TOUCH IT
-> Data from your network will be leaked in 10 days , take action and get in touch please
--- make sure that the best way to less the time for you is contacted us to recover and decrypt your secret data and stop leak operation
-----------------
>>> what we will provide and help with ?
-> we will provide advanced decryptor easy for use and we will return every file or data we delete or stole from your Network
-> we will give you link to download data stolen from your network as plus recover
-> we provide report to how fix your network , and how we gain access and bypass your security, and some advice to up your security
-----------------
>>> contact us here (use tor Browser to access chat): download tor from torproject.org
----------------
Chat system (TOR) join link : http://c43mpmijbb7rrvb3gc2w2hli7haeyrr2jlsl6xguveysfxwkt2iayjqd.onion/chat
put any username to join
----------------
- our session messanger ID (Add ons , please use chat in tor to contact , contact in session if you can't access chat) : 
054f55ec93aca9bac362b9d91eff36a7ce451e7caba47c0b2e004ba429f9529c79 (https://getsession.org)

- also you can use qtox ID : 8E9A6195A769FE7115F087C61D75CF32874C339B3AB0947D07480C9A8A12DA5009151BE6A51F
-----------------
>>> important notes : 
-> please do not touch the files becouse we can't decrypt it if you touch it
-> please contact us today or soon a possible , becouse the leak operation should start , and we will not decrypt or recover you after time
-----------------
- your leak post will be in our Blog : http://novadmrkp4vbk2padk5t6pbxolndceuc7hrcq4mjaoyed6nxsqiuzyyd.onion/

----------------------------------------------------------------------------- Ransom -----------------------------------------------------------------------------

Ransom-note text from RansomLook, licensed CC BY 4.0.