Nevada

MITRE ATT&CK does not currently catalogue Nevada, 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: low. Treat it as orientation, not attribution.

1. T1059.001 PowerShell Execution

   What they do: Nevada executes PowerShell scripts to run malicious commands and deploy payloads across the network.

   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: Nevada modifies registry run keys to ensure malware execution upon system reboot.

   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: Nevada disables antivirus tools and security software to evade detection and persistence mechanisms.

   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. T1070.004 File Deletion Stealth

   What they do: Nevada deletes Volume Shadow Copies and backup directories to prevent data recovery.

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

5. T1135 Network Share Discovery Discovery

   What they do: Nevada scans network shares to identify victim systems and valuable files for encryption.

   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.

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

   What they do: Nevada uses SMB/Windows Admin Shares for lateral movement between compromised hosts.

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

7. T1486 Data Encrypted for Impact Impact

   What they do: Nevada encrypts victim files using strong symmetric cryptography to hold data for ransom.

   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.

8. T1490 Inhibit System Recovery Impact

   What they do: Nevada calls system recovery inhibitors like shutdown scripts to maximize disruption.

   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.

Greetings! Your files were stolen and encrypted.


You have two ways:

	-> Pay a ransom and save your reputation.

	-> Wait for a miracle and lose precious time.


We advise you not to wait.

After 2 days of your silence we will make a call your superiors and notificate them about what's happened.

After another 2 days all your competitors will be informed about your decision.

Finally, after 3 days we will post your critical data on our TOR-website.

If you are going to recover your files from backups and forget this like a nightmare, we are hurry to inform you - you can't prevent a leak.


Recommendations:

	-> Don't delete/rename encrypted files

	-> Don't use any public "decryptor", they contain viruses.


You have to download TOR browser.

To contact with us your can use the following link:

	http://nevcorps5cvivjf6i2gm4uia7cxng5ploqny2rgrinctazjlnqr2yiyd.onion/[snip]


The cat is out of the bag.

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