Was MIM Fertility hit by ransomware?

MIM Fertility was listed by the coinbasecartel ransomware operation (United Kingdom), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the coinbasecartel ransomware group?

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

What data was leaked in the MIM Fertility breach?

coinbasecartel published data attributed to MIM Fertility. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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MIM Fertility

Claimed by Coinbasecartel · listed 5 hours ago

Today

Age

since listed · data leaked

Status timeline

ListedAug 1, 2026
Data leakeddate unknown

At a glance

Group: Coinbasecartel
Status: Data leaked
Country: United Kingdom
Sector: Healthcare
Listed on leak site: Aug 1, 2026

About the victim

AI dossier — public-source company profile

MIM Fertility is a US-based fertility clinic network specializing in reproductive medicine and assisted reproductive technologies. They provide services including in vitro fertilization, egg freezing, preimplantation genetic testing, and fertility preservation for individuals and couples.

Industry: Reproductive Medicine & Fertility Services

Attack summary

Severity: medium — Healthcare provider with access to sensitive patient PII and medical data (fertility records, genetic information). Data published status indicates exfiltration occurred, but no proof files are mentioned and sensitive healthcare data is presumed at risk.

The coinbasecartel group claims to have attacked MIM Fertility. No specific details are provided regarding whether data was exfiltrated, encrypted, or what specific data categories are at risk.

medium

Data the group says was taken

AI dossier — extracted from the leak post

Patient medical records
Fertility treatment histories
Genetic testing results
Personal health information

Original description

AI-summarised, not from the leak post

MIM Fertility is a US-based fertility clinic network specializing in reproductive medicine and assisted reproductive technologies. The company provides services such as in vitro fertilization, egg freezing, preimplantation genetic testing, and fertility preservation. Operating within the healthcare and reproductive medicine industry, MIM Fertility focuses on personalized patient care and works with fertility specialists to help individuals and couples achieve pregnancy.

Sources

Leak posthttp://fjg4zi4opkxkvdz7mvwp7h6goe4tcby3hhkrz43pht4j3vakhy75znyd.onion/companies/mim

Source

Indexed 5 hours 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 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 196 public disclosures across our corpus. First observed on a leak site on September 15, 2025; most recent post August 1, 2026. The operation is currently active.

Also tracked as: coinbase cartel.

Timeline of this disclosure

August 1, 2026MIM Fertility listed by coinbasecartelon the group's public leak site

Other recent disclosures by coinbasecartel

coinbasecartel has been linked to 196 public victims on Darkfield. A sample of the most recent:

See the full coinbasecartel dossier →

Sector and geography

This disclosure adds to ransomware activity in the Healthcare sector, which has 2,603 disclosures indexed across all operators we track. Geographically, MIM Fertility is reported in United Kingdom, a country with 377 ransomware disclosures in our corpus.

If your organisation is affected

A listing by coinbasecartel means MIM Fertility 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.
Report the incident to your national CERT, NCSC (United Kingdom), as required for your jurisdiction.
Monitor for the data appearing on coinbasecartel'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.