Disclosure context

About crypto24

Crypto24 is a recently emerged ransomware group first observed in April 2025, with a primary financial motivation evidenced by their targeting of high-value sectors across multiple geographic regions. The group's origin and affiliations remain unclear due to their recent emergence, though their targeting pattern suggests either independent operations or a new ransomware-as-a-service offering given the diverse geographic spread of their 43 documented victims. Their attack methodology and specific technical capabilities have not yet been thoroughly documented by major threat intelligence providers, though their targeting of technology, financial services, healthcare, and business services sectors indicates they likely employ common initial access vectors such as phishing or exploitation of public-facing applications to gain entry into victim networks. The group has demonstrated a preference for targeting organizations primarily in the United States while also conducting operations across Southeast Asia including Malaysia, Singapore, and Indonesia, as well as extending their reach to Egypt, suggesting either a globally distributed affiliate network or opportunistic targeting based on vulnerable infrastructure discovery. Crypto24 remains active as of the latest available intelligence reporting, though given their recent emergence, comprehensive details about their specific tactics, techniques, and procedures await further analysis by established cybersecurity research organizations. The group has been linked to 49 public disclosures across our corpus. First observed on a leak site on April 8, 2025; most recent post May 18, 2026. The operation is currently active.

Timeline of this disclosure

October 27, 2025Meinhardt Group listed by crypto24on the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Construction sector, which has 415 disclosures indexed across all operators we track. Geographically, Meinhardt Group is reported in SG, a country with 33 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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Meinhardt Group

Claimed by crypto24 · listed 7 months ago

Age

since listed · data leaked

Status timeline

Listed
Oct 27, 2025
Data leaked

At a glance

Group: crypto24
Status: Data leaked
Country: SG
Sector: Construction
Listed on leak site: Oct 27, 2025

About the victim

AI dossier — public-source company profile

Meinhardt Group is a leading global planning, engineering and project management consultancy headquartered in Singapore, with 55 offices across 5 continents. The firm provides services spanning urban planning, civil and structural engineering, MEP, façade, fire performance, sustainability, and construction and project management across sectors including buildings, transportation, utilities, and industrial. Meinhardt Singapore celebrated its Golden Jubilee in 2024, indicating the group's founding around 1974.

Industry: Engineering Consulting & Project Management
Address: Singapore (headquarters); offices in 55 locations across 5 continents
Employees: 1001-5000
Founded: 1974

Attack summary

Severity: high — Data has been confirmed as published by the threat actor against a large, multinational engineering consultancy operating across critical infrastructure sectors (transportation, energy, utilities, healthcare, government projects), suggesting significant business-sensitive and potentially project-related data exposure across multiple jurisdictions.

The ransomware group crypto24 claims to have compromised Meinhardt Group and has published data ('data_published' status), though the specific nature of the attack (encryption, exfiltration, or both) and the volume of data are not detailed in the available leak post excerpt.

high

Data the group says was taken

AI dossier — extracted from the leak post

Corporate data (unspecified)

What the group claims

...

Sources

Victim sitewww.meinhardtgroup.com

Source

Indexed 7 months 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.