Disclosure context

About lapsus$

Lapsus$ is a financially motivated cybercriminal group that emerged in December 2021, gaining notoriety for their aggressive extortion tactics and high-profile targeting of major corporations and government entities. The group is believed to have originated from South America, particularly Brazil, with suspected ties to young hackers operating independently rather than as a traditional ransomware-as-a-service operation, though they have demonstrated sophisticated coordination and insider recruitment capabilities. Lapsus$ primarily relies on social engineering techniques, SIM swapping, and insider threats to gain initial access to target networks, often recruiting employees through bribes or coercion rather than relying on traditional malware delivery methods, and they frequently employ data theft and public leak tactics for extortion rather than always deploying encryption-based ransomware. The group has conducted notable attacks against major technology companies including Microsoft, Nvidia, Samsung, and Okta, as well as targeting organizations across France, the United States, Brazil, Germany, and Canada, with a particular focus on consumer services, education, government facilities, and critical manufacturing sectors, leading to significant law enforcement attention and arrests of suspected members. Following arrests of key members by Brazilian and UK authorities in 2022, the group's activity has significantly diminished, though some security researchers suggest remnants may still be operational under different identities. The group has been linked to 21 public disclosures across our corpus. First observed on a leak site on December 10, 2021; most recent post May 10, 2026. The operation is currently active.

Timeline of this disclosure

March 1, 2026OSAC Aero listed by lapsus$on the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Not Found sector, which has 4,859 disclosures indexed across all operators we track. Geographically, OSAC Aero is reported in France, a country with 472 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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OSAC Aero

Claimed by lapsus$ · listed 3 months ago

Age

since listed · data leaked

Status timeline

Listed
Mar 1, 2026
Data leaked

At a glance

Group: lapsus$
Status: Data leaked
Country: France
Sector: Not Found
Listed on leak site: Mar 1, 2026

About the victim

AI dossier — public-source company profile

OSAC Aero is described as a Spanish aeronautical engineering company providing aeronautical consulting services, product development, aircraft maintenance, and the design, prototyping, and manufacturing of aerostructures. The company is noted as a partner to leading global aerospace organisations. No independent public site content was available to verify or expand these details.

Industry: Aeronautical Engineering & Aerospace Consulting

Attack summary

Severity: high — Data has been published (disclosed status: data_published) by Lapsus$ involving an aerospace engineering firm, which likely holds sensitive technical IP, aerostructure designs, and client data related to major aerospace organisations; aerospace sector data carries significant national-security and commercial sensitivity.

Lapsus$ claims to have attacked OSAC Aero with data published, indicating exfiltration of company data; no ransom amount or specific data volume was stated in the post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Aeronautical engineering documents
Product development data
Aircraft maintenance records
Aerostructure design/prototype files
Business/client records

Original description

AI-summarised, not from the leak post

"OSAC Aero" is a Spanish aeronautical engineering company. They provide aeronautical consulting services, product development, aircraft maintenance, and also focus on designing, prototyping, and manufacturing aerostructures. Their innovative solutions have established OSAC as a reliable partner for leading global aerospace organizations.

Source

Indexed 3 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.