Was Confidential files hit by ransomware?

Confidential files was listed by the medusalocker ransomware operation, 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 medusalocker ransomware group?

medusalocker 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 Confidential files breach?

medusalocker published data attributed to Confidential files. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Confidential files

Claimed by Medusalocker · listed 3 years ago

33m

Age

since listed · data leaked

Status timeline

ListedOct 2, 2023
Data leakeddate unknown

At a glance

Group: Medusalocker
Status: Data leaked
Sector: Financial Services
Listed on leak site: Oct 2, 2023

About the victim

AI dossier — public-source company profile

Unknown financial services company. The victim name 'Confidential files' is a generic placeholder with no identifying information available from public sources.

Industry: Financial Services

Attack summary

Severity: high — Confirmed exfiltration of sensitive financial and personally identifiable data (passports, client information) at scale; claimed revenue suggests multiple victims or substantial volume.

MedusaLocker claims to have exfiltrated a large volume of documents from one or more financial services companies, including financial records, client cases, passports, and tax-related documents. The group is offering the data for sale.

high

Data the group says was taken

AI dossier — extracted from the leak post

Financial documents
Client cases
Passports
Tax records

What the group claims

A large number of documents of large companies are available for sale Revenue-$10-$70kk Financial documents, client cases, passports, tax evasion and many other documents are in closed sale, please contact qtox to coordinate the sale

Sources

Leak posthttp://z6wkgghtoawog5noty5nxulmmt2zs7c3yvwr22v4czbffdoly2kl4uad.onion/?p=307

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.

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Disclosure context

About medusalocker

MedusaLocker is a ransomware operation first publicly documented around 2019, though the activity cluster reflected in this dataset shows observed campaigns beginning in November 2022, driven primarily by financial motivation with no known ideological or hacktivist agenda. The group is believed to operate out of or with ties to Eastern Europe, functioning as a Ransomware-as-a-Service model that allows affiliates to deploy the ransomware in exchange for a share of ransom proceeds, a structure documented in a joint advisory published by CISA, FBI, FinCEN, and HHS in June 2022. MedusaLocker actors typically gain initial access through phishing emails, exploitation of vulnerable Remote Desktop Protocol configurations, and compromised network devices, subsequently deploying the ransomware payload which encrypts victim files using AES-256 combined with RSA-2048 encryption while also exfiltrating sensitive data prior to encryption to enable double extortion pressure. Based on available telemetry, the group has claimed at least 67 known victims, with targeting concentrated heavily in the United States, United Kingdom, Brazil, France, and Israel, spanning sectors including business services, manufacturing, technology, and education, consistent with the opportunistic rather than highly selective targeting pattern characteristic of RaaS affiliate programs. As of the time of writing, MedusaLocker remains an active threat with no confirmed law enforcement disruption, takedown operation, or confirmed rebrand publicly attributed to the group by major intelligence or law enforcement agencies. The group has been linked to 78 public disclosures across our corpus. First observed on a leak site on November 15, 2022; most recent post July 7, 2026. The operation is currently active.

Timeline of this disclosure

October 2, 2023Confidential files listed by medusalockeron the group's public leak site

Other recent disclosures by medusalocker

medusalocker has been linked to 78 public victims on Darkfield. A sample of the most recent:

See the full medusalocker dossier →

Sector and geography

This disclosure adds to ransomware activity in the Financial Services sector, which has 1,184 disclosures indexed across all operators we track.

If your organisation is affected

A listing by medusalocker means Confidential files 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 medusalocker'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.