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 January 16, 2024. The operation is currently inactive.

Also tracked as: QuantumLocker, Mount Locker, DagonLocker.

Timeline of this disclosure

June 30, 2022Crupi Group 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, Crupi Group is reported in Canada, a country with 810 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

Crupi Group

Claimed by Quantum · listed 4 years ago

47m

Age

since listed · data leaked

Status timeline

Listed
Jun 30, 2022
Data leaked

At a glance

Group: Quantum
Status: Data leaked
Country: Canada
Sector: Business Services
Listed on leak site: Jun 30, 2022

About the victim

AI dossier — public-source company profile

Crupi Group is a Canadian assembly of companies centred on D. Crupi and Sons Ltd., operating in the paving and road construction sector. The group serves developers and municipalities, suggesting it is a mid-sized civil infrastructure contractor. No further details about scale or founding date are available from the leak post or public sources.

Industry: Paving & Road Construction

Attack summary

Severity: high — Data has been confirmed as published by the threat actor, indicating successful exfiltration from a construction/civil infrastructure company that works with municipalities; government-adjacent contractor data exposure warrants a high severity rating even without a stated data volume.

The Quantum ransomware group claims to have attacked Crupi Group and has published data (disclosed status: data_published), indicating exfiltration of company data, though the specific volume and categories of data at stake are not detailed in the truncated post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Company business records

What the group claims

The Crupi Group is an assembly of companies surrounding D. Crupi and Sons Ltd. to fulfill paving and road construction needs for developers, municipalities

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.