Was simmerscrane.com hit by ransomware?

simmerscrane.com was listed by the Lynx ransomware operation (United States), 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 Lynx ransomware group?

Lynx 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 simmerscrane.com breach?

Lynx published data attributed to simmerscrane.com. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Simmers Crane Design & Services Company

listed as simmerscrane.com · Claimed by Lynx · listed 9 months ago

Age

since listed · data leaked

Status timeline

ListedOct 24, 2025
Data leakeddate unknown

At a glance

Group: Lynx
Status: Data leaked
Country: United States
Sector: Manufacturing
Listed on leak site: Oct 24, 2025

About the victim

AI dossier — public-source company profile

Simmers Crane Design & Services Company is a US-based specialty engineering firm founded in 1958, providing complete engineering services, field services, and materials for cranes, weight handling, mill, special, and Category A nuclear equipment. The company serves both domestic and international clients, primarily in the steel and industrial sectors, and is an OEM supplier alongside its sister division Reading Crane & Engineering Co. Simmers is accredited by the U.S. Department of Labor to inspect, test, and certify maritime shore-based material handling devices.

Industry: Crane Engineering & Overhead Material Handling Services
Founded: 1958

Attack summary

Severity: high — Data has been published (disclosed status: data_published), confirming exfiltration of business data from a company handling nuclear-category and defence-adjacent industrial equipment; potential sensitivity of engineering and client data elevates severity.

The Lynx ransomware group claims an attack on Simmers Crane Design & Services Company and has disclosed the status as data_published, indicating exfiltration and/or publication of company data. The specific data types exfiltrated are not enumerated in the leak post excerpt.

high

Data the group says was taken

AI dossier — extracted from the leak post

Engineering documents
Business records
Field service records
Client/contract data

What the group claims

Simmers Crane Design & Services Company was founded in 1958 by Charles Simmers, former Chief Engineer with Koppers Co. and Vice President of Engineering with Morgan Engineering Company. Mr. Simmers recognized the need for a specialty engineering group to serve the steel industry, and was able to staff his group with engineering personnel from major crane and mill builders. Initially providing engineering services only, Simmers became a Division of Pollock Research and Design, Inc. in 1966 and has expanded its' capabilities to include complete engineering services, field services, and materials for cranes, weight handling, mill, special, and category "A" nuclear equipment. Providing services both domestically and internationally, Simmers, along with its' sister division Reading Crane & Engineering Co., is an OEM supplier. Simmers is accredited by the U.S. Department of Labor to inspect, test, and certify Maritime shore based material handling devices such as cranes, derricks, spouts

Sources

Victim sitesimmerscrane.com
Leak posthttp://lynxchatly4zludmhmi75jrwhycnoqvkxb4prohxmyzf4euf5gjxroad.onion/leaks/68fb33c52423bc3ce0e922a0

Source

Indexed 9 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.

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Disclosure context

About Lynx

Lynx is a relatively new ransomware group that emerged in July 2024, operating with apparent financial motivations and demonstrating rapid scaling capabilities with 397 documented victims within their first few months of operation. The group's origin and specific affiliations remain unclear due to their recent emergence, though their targeting patterns suggest a sophisticated operation that may operate independently rather than as a traditional Ransomware-as-a-Service model. Based on their victim distribution, Lynx appears to employ broad-spectrum targeting methodologies focusing heavily on English-speaking countries, with the United States, United Kingdom, Canada, Germany, and Australia representing their primary geographic targets, while concentrating their attacks on manufacturing, business services, technology, and transportation/logistics sectors, though specific technical details regarding their initial access vectors, encryption methods, and data exfiltration practices have not yet been extensively documented by major security research organizations. Due to the group's recent emergence, there are no widely reported major campaigns or high-profile incidents that have gained significant public attention from law enforcement agencies or established threat intelligence firms. As of late 2024, Lynx appears to remain active with no reported law enforcement disruptions or operational changes. The group has been linked to 414 public disclosures across our corpus. First observed on a leak site on July 29, 2024; most recent post June 18, 2026. The operation is currently active.

Timeline of this disclosure

October 24, 2025simmerscrane.com listed by Lynxon the group's public leak site

Other recent disclosures by Lynx

Lynx has been linked to 414 public victims on Darkfield. A sample of the most recent:

See the full Lynx dossier →

Sector and geography

This disclosure adds to ransomware activity in the Manufacturing sector, which has 3,681 disclosures indexed across all operators we track. Geographically, simmerscrane.com is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Lynx means simmerscrane.com 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.
Report the incident to your national CERT, CISA (United States), as required for your jurisdiction.
Monitor for the data appearing on Lynx'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.