Disclosure context

About coinbasecartel

CoinbaseCartel is a ransomware group that emerged in September 2025 with financially motivated operations targeting organizations across multiple sectors and geographic regions. The group has demonstrated significant activity in a short timeframe, compromising at least 102 known victims primarily across the United States, United Arab Emirates, Germany, Canada, and Brazil. Their targeting patterns show a preference for technology companies, financial services organizations, manufacturing entities, and consumer services businesses, suggesting an opportunistic approach focused on organizations likely to have both valuable data and the financial resources to pay ransoms. Given the group's recent emergence and limited public documentation from established threat intelligence sources, details regarding their specific attack methodologies, infrastructure, and organizational structure remain largely unconfirmed by major cybersecurity firms or law enforcement agencies. The group appears to maintain active operations as of late 2025, though comprehensive analysis of their tactics, techniques, and procedures awaits further investigation and reporting by established threat intelligence organizations. The group has been linked to 176 public disclosures across our corpus. First observed on a leak site on September 15, 2025; most recent post May 16, 2026. The operation is currently active.

Also tracked as: coinbase cartel.

Timeline of this disclosure

May 15, 2026Zywave listed by coinbasecartelon the group's public leak site

Data size: 43 GB

Sector and geography

This disclosure adds to ransomware activity in the Business Services sector, which has 2,640 disclosures indexed across all operators we track. Geographically, Zywave is reported in US, a country with 2,713 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

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Zywave

Claimed by coinbasecartel · listed 5 days ago

43 GB

Data size

Age

since listed · data leaked

Status timeline

Listed
May 15, 2026
Data leaked

At a glance

Group: coinbasecartel
Status: Data leaked
Country: US
Sector: Business Services
Listed on leak site: May 15, 2026
Data size: 43 GB

About the victim

AI dossier — public-source company profile

Zywave is a US-based insurance technology company that provides software, data, and AI-driven solutions to insurance carriers, brokers, MGAs, and agencies. Its product portfolio spans prospecting databases, rating/quoting/binding workflows, client engagement portals, underwriting analytics, and agentic AI tools. The company serves a broad cross-section of the US insurance distribution ecosystem and holds large volumes of insurance prospect, premium, quote, and loss-event data.

Industry: Insurance Technology (InsurTech) Software & Data
Employees: 501-1000

Attack summary

Severity: high — The group claims full exfiltration of all software repositories from an InsurTech company that holds large proprietary datasets including insurance prospect databases, anonymized premium/quote records, and over 1 million verified loss events. Source code theft from a SaaS/data platform represents significant IP and potential supply-chain risk for downstream insurers and brokers; disclosure status is 'data_published', elevating beyond medium despite no explicit regulated PII confirmation.

The group 'coinbasecartel' claims to have exfiltrated every software repository belonging to Zywave and is demanding contact, with the disclosure status marked as data_published. No ransom amount, data size, or proof files have been publicly detailed in the post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Software source code repositories
Proprietary insurance technology codebases
Potential insurance prospect and broker data
Potential premium and quote records
Potential loss event datasets

Original description

AI-summarised, not from the leak post

Zywave is a US-based software company headquartered in Milwaukee, Wisconsin. It operates in the insurance technology sector, providing cloud-based software solutions to insurance brokers, carriers, and agencies. Its platform offers tools for sales enablement, client delivery, analytics, and agency management. Zywave serves thousands of insurance professionals across North America, helping them streamline operations and improve client engagement.

The leak post

captured from the group's site

System Breach • Coinbasecartel We are looking for new partners/insiders. Send us a message to dicuss We are looking for new partners/insiders. Send us a message to dicuss CRITICAL ANNOUNCEMENTS &times; News We are behind on many leaks , that&#39;s going to change soon. New leaks added. Grafana Zywave ACKNOWLEDGE Skip to content CC Coinbasecartel Home Auctions Partnership Contacts WE HAVE ALL YOUR DATA Negotiate now, or don't, the choice is yours. We will make this a sustained campaign and watch your reputation burn. &#x1F441; 344156 have seen this page 105 Total Targets Featured Target Grafana Active Software $400 Million We can cause you more damage then you would ever imagine,contact us. Full Details Companies Sort by Recent Status Revenue Zywave NEW Active Software $210 Million zywave.com Details Buenos Aires Software NEW Active Tech $12.7 Million bas.com.ar Details Cass information Systems NEW Active Credit Card Processing $207.4 Million cassinfo.com Details Tab Service NEW Active Tech Undisclosed tabservice.com Details Alpinion NEW Active Medical $9.7 Million alpinion.com Details Jozef Stefan Institute (IJS) NEW Active Research $83.5 Million ijs.si Details Aptim Active Archite…

Screenshot of the leak post

Sources

Victim sitezywave.com
Leak posthttp://fjg4zi4opkxkvdz7mvwp7h6goe4tcby3hhkrz43pht4j3vakhy75znyd.onion/companies/zywave

Source

Indexed 5 days 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.