Disclosure context

About Quantum

Quantum is a ransomware group that emerged in September 2021, operating with primarily financial motivations and demonstrating a focus on high-value targets across English-speaking nations. The group's geographic targeting patterns and operational characteristics suggest possible connections to established ransomware ecosystems, though specific attribution or confirmed affiliations with other threat actors remain undocumented in public reporting. Quantum operators typically employ double extortion tactics, combining data encryption with the threat of public data exposure to maximize pressure on victims, and their campaigns have consistently targeted sectors with critical operational dependencies including business services, manufacturing, and information technology infrastructure. The group has maintained a relatively low public profile compared to other major ransomware operations, with their 68 documented victims representing a more selective approach to target acquisition rather than broad-scale campaigns. Despite limited public law enforcement reporting specifically focused on Quantum operations, the group's continued activity pattern suggests they remain an active threat as of recent observations, though comprehensive operational details remain scarce in publicly available threat intelligence reporting. The group has been linked to 68 public disclosures across our corpus. First observed on a leak site on September 9, 2021; most recent post December 9, 2022. The operation is currently inactive.

Also tracked as: QuantumLocker, Mount Locker, DagonLocker.

Timeline of this disclosure

June 14, 2022YMCA listed by Quantumon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Community, Social Services & Non-Profit Organisations sector. Geographically, YMCA 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

YMCA of South Florida

listed as YMCA · Claimed by Quantum · listed 4 years ago

47m

Age

since listed · data leaked

Status timeline

Listed
Jun 14, 2022
Data leaked

At a glance

Group: Quantum
Status: Data leaked
Country: United States
Sector: Community, Social Services & Non-Profit Organisations
Listed on leak site: Jun 14, 2022

About the victim

AI dossier — public-source company profile

YMCA of South Florida is a non-profit organization focused on building healthy, confident, and secure children, families, and communities in the South Florida region. It operates as part of the broader YMCA network, typically offering youth development programs, healthy living initiatives, and social responsibility efforts. The organization serves a wide geographic area across South Florida.

Industry: Non-Profit Community & Youth Services

Attack summary

Severity: high — Data has been published by the group (data_published status), indicating confirmed exfiltration. As a non-profit serving children and families, the organization likely holds PII for minors, families, and staff, which elevates sensitivity. The confirmed data publication without ransom resolution warrants a high severity rating.

The Quantum ransomware group claims to have attacked YMCA of South Florida and has published data (disclosed status: data_published), indicating exfiltration of data from the organization, though specific data categories and volume are not detailed in the leak post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Organizational data
Potentially member/donor records
Potentially employee records

What the group claims

YMCA of South Florida has been dedicated to building healthy, confident and secure children, families and communities.

Source

Indexed 4 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.