Who is the kazu ransomware group?

kazu is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

Ransomware victim disclosure

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Defensoría del Pueblo de Colombia – Protection and Promotion of Human Rights

Q: What data was leaked in the Defensoría del Pueblo de Colombia – Protection and Promotion of Human Rights breach?

kazu published data attributed to Defensoría del Pueblo de Colombia – Protection and Promotion of Human Rights. Darkfield captured the leak post and a screenshot of the listing.

Claimed by Kazu · listed 8 months ago

Age

since listed · data leaked

Status timeline

ListedNov 11, 2025
Data leakeddate unknown

At a glance

Group: Kazu
Status: Data leaked
Country: Colombia
Sector: Public Sector
Listed on leak site: Nov 11, 2025

About the victim

AI dossier — public-source company profile

La Defensoría del Pueblo de Colombia is a Colombian state institution responsible for the protection, promotion, and dissemination of human rights. It serves citizens across Colombia through regional offices and national directorates, handling complaints, judicial actions, public defender services, and early-warning systems for human rights risks. It operates under the Colombian Constitution and is a key oversight body for vulnerable populations.

Industry: Government Human Rights Ombudsman
Address: Bogotá, Colombia
Employees: 501-1000
Founded: 1992

Attack summary

Severity: critical — The victim is a national government human rights body holding sensitive records on conflict victims, vulnerable populations, indigenous groups, displaced persons, and complainants — categories constituting regulated PII at scale with high potential for harm to at-risk individuals. Data is marked as published.

The group 'kazu' claims to have published data belonging to the Defensoría del Pueblo de Colombia, with the disclosed status marked as 'data_published'; the leak post itself provides minimal detail beyond a Tor server header, suggesting data has been exfiltrated and made available on a dark-web server.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Government institutional records
Citizen complaints and petitions (PQRSDF)
Personal data of vulnerable populations
Human rights case files
Internal administrative documents
Staff and directorate information

What the group claims

The official online portal of the Defensoría del Pueblo de Colombia, a constitutional and autonomous institution responsible for promoting, protecting, and defending human rights across the country. It serves as a public platform where citizens can access information about their rights, file complaints, seek legal guidance, and learn about the institution’s oversight and advocacy efforts. The Defensoría operates independently from other branches of government and plays a key role in ensuring that state entities respect and uphold fundamental rights, especially for vulnerable populations

The leak post

captured from the group's site

Apache/2.4.65 (Debian) Server at 6czlbd2jfiy6765fbnbnzuwuqocg57ebvp3tbm35kib425k4qnmiiiqd.onion Port 80

Sources

Victim sitewww.defensoria.gov.co
Leak posthttp://6czlbd2jfiy6765fbnbnzuwuqocg57ebvp3tbm35kib425k4qnmiiiqd.onion/ransom.html#Defensoría

Source

Indexed 8 months 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.

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Disclosure context

About kazu

The Kazu ransomware group is a relatively new threat actor that emerged in November 2025, operating with apparent financial motivations based on their targeting patterns across multiple sectors and geographic regions. Given their recent emergence and limited public documentation, details about their country of origin and potential affiliations remain unclear, though their targeting of diverse international victims suggests either a ransomware-as-a-service model or an independent operation with broad reach capabilities. With only nine documented victims to date, specific details about Kazu's attack methodology, initial access vectors, and encryption techniques have not been extensively documented by major threat intelligence organizations, though their targeting spans healthcare, public sector, financial services, and technology organizations across the United States, Colombia, South Africa, Nigeria, and Great Britain. The group's recent emergence means there are no widely reported major campaigns or high-profile incidents documented by established security research organizations like Mandiant, CISA, or the FBI. As of the latest available intelligence, Kazu appears to remain active given their very recent first observation date, though their limited victim count and recent emergence make definitive assessments of their operational status preliminary. The group has been linked to 14 public disclosures across our corpus. First observed on a leak site on November 11, 2025; most recent post May 27, 2026. The operation is currently active.

Timeline of this disclosure

November 11, 2025Defensoría del Pueblo de Colombia – Protection and Promotion of Human Rights listed by kazuon the group's public leak site

Other recent disclosures by kazu

kazu has been linked to 14 public victims on Darkfield. A sample of the most recent:

See the full kazu dossier →

Sector and geography

This disclosure adds to ransomware activity in the Public Sector sector, which has 466 disclosures indexed across all operators we track. Geographically, Defensoría del Pueblo de Colombia – Protection and Promotion of Human Rights is reported in Colombia, a country with 19 ransomware disclosures in our corpus.

If your organisation is affected

A listing by kazu means Defensoría del Pueblo de Colombia – Protection and Promotion of Human Rights appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
Monitor for the data appearing on kazu's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

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.