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

September 1, 2022Moscone Center listed by Quantumon the group's public leak site

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, Moscone Center 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

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Moscone Center

Claimed by Quantum · listed 4 years ago

45m

Age

since listed · data leaked

Status timeline

Listed
Sep 1, 2022
Data leaked

At a glance

Group: Quantum
Status: Data leaked
Country: United States
Sector: Business Services
Listed on leak site: Sep 1, 2022

About the victim

AI dossier — public-source company profile

Moscone Center is a major convention and exhibition facility headquartered in San Francisco, California, founded in 1981. It is one of the largest convention centers on the West Coast, hosting major trade shows, conferences, and public events. The center is operated by the City and County of San Francisco and managed by ASM Global.

Industry: Convention & Exhibition Centers
Address: 747 Howard Street, San Francisco, CA 94103
Employees: 201-500
Founded: 1981

Attack summary

Severity: high — Data has been published (disclosed status: data_published) by a known ransomware group against a prominent publicly managed venue, implying confirmed exfiltration of business and potentially personal/employee data from a high-profile civic institution.

The Quantum ransomware group claims an attack on Moscone Center and has published data, though the specific nature of the intrusion (encryption, exfiltration, or both) and the volume of data are not detailed in the post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Internal business documents
Employee records
Operational data

What the group claims

Founded in 1981. Moscone Center is headquartered in San Fransisco, California. Moscone Center is a meeting and exhibition facility

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.