ElDorado

MITRE ATT&CK does not currently catalogue ElDorado, 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. T1078.002 Domain Accounts Initial AccessPersistencePrivilege EscalationStealth

   What they do: ElDorado exploits valid domain accounts to gain initial access and persist within victim networks.

   What that means: Adversaries may obtain and abuse credentials of a domain account as a means of gaining Initial Access, Persistence, Privilege Escalation, or Defense Evasion.

2. T1059.001 PowerShell Execution

   What they do: ElDorado executes malicious payloads via PowerShell scripts to stage ransomware and disable recovery mechanisms.

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

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

   What they do: ElDorado establishes persistence by modifying Registry Run Keys to execute ransomware on startup.

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

4. T1685 Disable or Modify Tools Defense Impairment

   What they do: ElDorado disables security tools like antivirus software and monitoring agents to prevent system recovery or detection.

   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.

5. T1027.013 Encrypted/Encoded File Stealth

   What they do: ElDorado encrypts victim files using encoded formats to obfuscate data before ransomware impact.

   What that means: Adversaries may encrypt or encode files to obfuscate strings, bytes, and other specific patterns to impede detection.

6. T1135 Network Share Discovery Discovery

   What they do: ElDorado uses network share discovery to locate and encrypt victim file shares across compromised infrastructure.

   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: ElDorado moves laterally via SMB/Windows Admin Shares to compromise additional systems.

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

8. T1567.002 Exfiltration to Cloud Storage Exfiltration

   What they do: ElDorado exfiltrates stolen victim data via C2 channels to enhance extortion leverage.

   What that means: Adversaries may exfiltrate data to a cloud storage service rather than over their primary command and control channel.

9. T1486 Data Encrypted for Impact Impact

   What they do: ElDorado encrypts critical victim data files to create impact and force ransom payments.

   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.

10. T1490 Inhibit System Recovery Impact

    What they do: ElDorado inhibits system recovery by destroying Volume Shadow Copies and backup restore capabilities.

    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.

To the board of directors.

Your network has been attacked through various vulnerabilities found in your system.
We have gained full access to the entire network infrastructure.

All your confidential information about all employees and all partners and developments has been downloaded to our servers and is located with us.

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-

Our team has an extensive background in legal and so called white hat hacking.
However, clients usually considered the found vulnerabilities to be minor and poorlyr\n
paid for our services.
So we decided to change our business model. Now you understand how important it isr\n

to allocate a good budget for IT security.
This is serious business for us and we really don't want to ruin your privacy,r\n
reputation and a company.
We just want to get paid for our work whist finding vulnerabilities in various networks.

Your files are currently encrypted with our tailor made state of the art algorithm.
Don't try to terminate unknown processes, don't shutdown the servers, do not unplug drives,
all this can lead to partial or complete data loss.

We have also managed to download a large amount of various, crucial data from your network.
A complete list of files and samples will be provided upon request.

We can decrypt a couple of files for free. The size of each file must be no more than 5 megabytes.

All your data will be successfully decrypted immediately after your payment.
You will also receive a detailed list of vulnerabilities used to gain access to your network.
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-

If you refuse to cooperate with us, it will lead to the following consequences for your company:
1. All data downloaded from your network will be published for free or even sold
2. Your system will be re-attacked continuously, now that we know all your weak spotsr

3. We will also attack your partners and suppliers using info obtained from your network
4. It can lead to legal actions against you for data breaches

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
                   !!!!Instructions for contacting our team!!!!
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
  ---> Download and install TOR browser from this site : https://torproject.org
  ---> For contact us via LIVE CHAT open our website : http://panelqbinglxczi2gqkwderfvgq6bcv5cbjwxrksjtvr5xv7ozh5wqad.onion/Url=[snip]
  ---> If Tor is restricted in your area, use VPN
  ---> All your Data will be published in 7 Days if NO contact made
  ---> Your Decryption keys will be permanently destroyed in 3 Days if no contact made
  ---> Your Data will be published if you will hire third-party negotiators to contact us

Hello! 

Your files have been stolen from your network and encrypted with a strong algorithm. We work for money and are not associated with politics. All you need to do is contact us and pay.

--- Our communication process:

	1. You contact us.
	1. We send you a list of files that were stolen.
	2. We decrypt 1 file to confirm that our decryptor works.
	3. We agree on the amount, which must be paid using BTC.
	4. We delete your files, we give you a decryptor.
	5. We give you a detailed report on how we compromised your company, and recommendations on how to avoid such situations in the future.
   
--- Client area (use this site to contact us):

	Link for Tor Browser: http://panela3eefdzfzxzxcshfnbustdprtlhlbe3x2fqomdz7t33iqtzvjyd.onion/Url=[snip]
	>>> to begin the recovery process.
	
	* In order to access the site, you will need Tor Browser, 
	  you can download it from this link: https://www.torproject.org/

--- Recommendations: 

	DO NOT RESET OR SHUTDOWN - files may be damaged.
	DO NOT RENAME OR MOVE the encrypted and readme files.
	DO NOT DELETE readme files.

--- Important:

	If you refuse to pay or do not get in touch with us, we start publishing your files.


	Еhe decryptor will be destroyed and the files will be published on our blog.
	
	Blog: http://dataleakypypu7uwblm5kttv726l3iripago6p336xjnbstkjwrlnlid.onion

Sincerely!

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