U-bomb

MITRE ATT&CK does not currently catalogue U-bomb, 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: u-bomb executes PowerShell scripts to run malicious commands and payload deployment on compromised hosts.

   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: u-bomb modifies registry run keys and startup folders to ensure malware persistence across reboots.

   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: u-bomb disables security tools and event logging mechanisms to hinder detection and forensic analysis of intrusions.

   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: u-bomb inserts junk code into legitimate 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: u-bomb deletes Volume Shadow Copies and backup directories via command-line utilities to prevent data recovery.

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

6. T1018 Remote System Discovery Discovery

   What they do: u-bomb performs remote system discovery to identify additional hosts within the network for spreading ransomware.

   What that means: Adversaries may attempt to get a listing of other systems by IP address, hostname, or other logical identifier on a network that may be used for Lateral Movement from the current system.

7. T1049 System Network Connections Discovery Discovery

   What they do: u-bomb queries system network connections to identify active services and communication endpoints for targeting.

   What that means: Adversaries may attempt to get a listing of network connections to or from the compromised system they are currently accessing or from remote systems by querying for information over the network.

8. T1135 Network Share Discovery Discovery

   What they do: u-bomb scans network shares using native tools to discover accessible victim directories for lateral movement and data targeting.

   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.

9. T1486 Data Encrypted for Impact Impact

   What they do: u-bomb encrypts victim files and data stores using strong symmetric encryption to maximize impact and pressure for ransom payment.

   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. T1491.001 Internal Defacement Impact

    What they do: u-bomb performs internal defacement by altering or corrupting web content and user files to increase disruption.

    What that means: An adversary may deface systems internal to an organization in an attempt to intimidate or mislead users, thus discrediting the integrity of the systems.

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

+++ YOUR COMPANY NETWORK HAS BEEN PENETRATED +++

All your important files have been encrypted!
No software available on internet can help you.
We are the only ones able to solve your problem.

Your sensitive data are currently stored on a private server.
This server will be immediately destroyed after your payment.
If you decide to not pay, we will release your data to public or re-seller.
So you can expect your data to be publicly available in the near future.

You will can send us 3 files and we will decrypt it for free to prove we are able to give your files back.

Do you really want to restore your files?
1. Type the address https://torproject.org in your Internet browser.
2. Press 'Download Tor Browser', install and run it.
3. Now you have Tor Browser. In the Tor Browser open the link.
   http://contiuevxdgdhn3zl2kubpajtfgqq4ssj2ipv6ujw7fwhggev3rk6hqd.onion
4. Copy and paste an access token in the input form on server.
   Your personal access token: [snip]
5. If site is not reachable, contact us via email: [email protected]

IF YOU DON'T CONTACT US WITHIN 72 HOURS, PRICE WILL BE HIGHER.

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