Disclosure context

About Cuba

The Cuba ransomware group is a financially-motivated cybercriminal organization that emerged in February 2021 and has since conducted attacks against at least 105 known victims globally. The group operates as an independent ransomware operation with suspected ties to Russian-speaking cybercriminals, though their exact country of origin remains unconfirmed by law enforcement agencies. Cuba ransomware operators primarily gain initial access through compromised Remote Desktop Protocol (RDP) credentials, exploitation of Microsoft Exchange vulnerabilities, and phishing campaigns, subsequently deploying their custom Cuba ransomware payload which encrypts victim files while exfiltrating sensitive data before encryption as part of their double extortion strategy. The group has particularly targeted organizations in the United States, United Kingdom, France, Australia, and Belgium, with a notable focus on critical infrastructure sectors including healthcare, financial services, manufacturing, and energy companies. According to FBI reporting, the Cuba ransomware group has demanded ransom payments ranging from hundreds of thousands to millions of dollars from their victims. As of recent threat intelligence assessments, the Cuba ransomware group remains active and continues to pose a significant threat to organizations across multiple sectors and geographic regions. The group has been linked to 105 public disclosures across our corpus. First observed on a leak site on February 3, 2021; most recent post February 1, 2024. The operation is currently inactive.

Also tracked as: COLDDRAW, Fidel.

Timeline of this disclosure

October 3, 2023co.rock.wi.us listed by Cubaon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Government sector, which has 509 disclosures indexed across all operators we track. Geographically, co.rock.wi.us is reported in United States, a country with 7,392 ransomware disclosures in our corpus.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.

Ransomware victim disclosure

← All victims

Rock County Public Health Department

listed as co.rock.wi.us · Claimed by Cuba · listed 3 years ago

32m

Age

since listed · data leaked

Status timeline

Listed
Oct 3, 2023
Data leaked

At a glance

Group: Cuba
Status: Data leaked
Country: United States
Sector: Government
Listed on leak site: Oct 3, 2023

About the victim

AI dossier — public-source company profile

The Rock County Public Health Department (RCPHD) is a Level III public health department serving Rock County, Wisconsin. It provides public health services to over 160,000 residents across more than 25 cities, villages, and towns in the county.

Industry: Public Health & Government Services
Address: Rock County, Wisconsin, United States

Attack summary

Severity: critical — The victim is a government public health department serving over 160,000 residents; data published by the threat actor likely includes regulated PII and potentially protected health information (PHI) at significant scale, meeting the threshold for critical severity.

The Cuba ransomware group claims to have attacked the Rock County Public Health Department and has published data (disclosed status: data_published), indicating exfiltration of data from this government public health entity.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Government public health records
Resident personal information
Internal departmental data

What the group claims

Rock County Public Health DepartmentThe Rock County Public Health Department (RCPHD) is a level III health department in Rock County, Wisconsin. Our staff serves over 160,000 people in more than 25 cities, villages, and towns. As a...

Sources

Victim siteco.rock.wi.us

Source

Indexed 3 years ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.