Disclosure context

About Lorenz

Lorenz is a ransomware group that emerged in January 2020 and operates primarily for financial gain, having claimed approximately 78 victims across multiple sectors. The group's origin and specific affiliations remain largely undocumented by major threat intelligence organizations, though their targeting patterns suggest a focus on English-speaking nations including the United States, United Kingdom, and Australia. Lorenz primarily targets healthcare, finance, automotive, construction, and retail sectors, suggesting they may opportunistically attack organizations with valuable data and limited security resources rather than following a specific geopolitical agenda. While detailed technical analysis of their attack methodology has not been extensively published by major security firms like Mandiant or government agencies such as CISA, the group appears to follow typical ransomware deployment patterns common to financially-motivated cybercriminal organizations. Public documentation of specific high-profile campaigns, notable victims, or significant law enforcement actions against Lorenz remains limited in open-source intelligence reporting. Based on available victim data extending beyond 2020, the group appears to have maintained some level of operational activity, though comprehensive assessments of their current operational status have not been widely published by authoritative sources in the threat intelligence community. The group has been linked to 78 public disclosures across our corpus. First observed on a leak site on January 12, 2020; most recent post December 11, 2023. The operation is currently inactive.

Timeline of this disclosure

September 12, 2023BF&S Civil Engineers listed by Lorenzon 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.

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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BF&S Civil Engineers

Claimed by Lorenz · listed 3 years ago

32m

Age

since listed · data leaked

Status timeline

Listed
Sep 12, 2023
Data leaked

At a glance

Group: Lorenz
Status: Data leaked
Sector: Construction
Listed on leak site: Sep 12, 2023

About the victim

AI dossier — public-source company profile

BF&S Civil Engineers is a civil engineering firm operating in the construction sector. Based on the company name, they likely provide civil engineering design, consultancy, or project management services. No further details are available from the leak post or public site excerpt provided.

Industry: Civil Engineering & Construction Consultancy

Attack summary

Severity: medium — Data has been marked as published by the Lorenz group, implying exfiltration occurred, but no details on data type, volume, or sensitivity are available to elevate to high or critical. The construction/civil engineering sector may hold project plans, contracts, and employee PII, but this cannot be confirmed from available evidence.

The Lorenz ransomware group has listed BF&S Civil Engineers with a disclosed status of 'data_published', indicating that data has been exfiltrated and published. No further details on the nature of the attack or specific data claims are available from the captured leak post.

medium

Sources

Victim siteBF&S Civil Engineers

Source

Indexed 3 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.