Disclosure context

About LockBit

LockBit is a highly prolific ransomware group that emerged in October 2020 and has become one of the most active ransomware operations globally, with over 3,500 documented victims and a primary motivation of financial gain through extortion. The group is suspected to originate from Russia and operates as a Ransomware-as-a-Service (RaaS) model, recruiting affiliates to conduct attacks while providing them with ransomware tools, infrastructure, and support. LockBit primarily gains initial access through exploiting vulnerabilities in public-facing applications, credential stuffing attacks, and phishing campaigns, employing double extortion tactics where they steal sensitive data before encrypting systems and threatening to leak the information if ransom demands are not met. The group has demonstrated significant technical sophistication, developing multiple variants including LockBit 3.0 (also known as LockBit Black), and has been particularly active in targeting business services, manufacturing, technology, and healthcare sectors across the United States, France, Germany, United Kingdom, and Italy. Despite ongoing law enforcement efforts and international cooperation to disrupt their operations, including seizures of infrastructure and arrests of affiliates, LockBit has shown resilience and adaptability, continuing to operate and evolve their tactics while maintaining their position as one of the most dominant ransomware threats in the cybercriminal landscape. The group has been linked to 3,536 public disclosures across our corpus. First observed on a leak site on October 21, 2020; most recent post March 30, 2026. The operation is currently active.

Also tracked as: LockBit 3.0, LockBit Black, LockBit Green, ABCD ransomware.

Timeline of this disclosure

March 29, 2026AEA-MG (Association of Electricians and Employees of CEMIG) listed by LockBiton the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Labor Union/Association sector. Geographically, AEA-MG (Association of Electricians and Employees of CEMIG) is reported in Brazil, a country with 319 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

AEA-MG (Association of Electricians and Employees of CEMIG)

Claimed by LockBit · listed 2 months ago

52d

Age

since listed · data leaked

Status timeline

Listed
Mar 29, 2026
Data leaked

At a glance

Group: LockBit
Status: Data leaked
Country: Brazil
Sector: Labor Union/Association
Listed on leak site: Mar 29, 2026

About the victim

AI dossier — public-source company profile

AEA-MG (Associação dos Eletricitários e Empregados da CEMIG e Suas Subsidiárias) is a Brazilian labor union and employee association founded on 29 January 1983 by electricians working at CEMIG, the major Minas Gerais state electricity utility, and its subsidiaries. The organization represents and advocates for the professional and social interests of electricity-sector workers in Minas Gerais, Brazil.

Industry: Labor Union / Trade Association (Electricity Sector)
Founded: 1983

Attack summary

Severity: high — Data has been published (not merely listed), indicating confirmed exfiltration. As a union representing CEMIG electricity-sector workers, exfiltrated data likely includes PII of members and employees tied to critical infrastructure personnel, elevating sensitivity beyond a typical business data breach.

LockBit claims to have compromised AEA-MG and published the data (disclosed status: data_published), indicating exfiltration of organizational data. No specific data size or ransom amount was stated in the post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Member/employee records
Organizational documents
Association administrative data

What the group claims

Electricians and employees association data

The leak post

captured from the group's site

[ new blog domain lockbit 5.0  New secure blog domain, with a multi-layered protection system against all-powerful FBI agents lockbitapt67g6rwzjbcxnww5efpg4qok6vpfeth7wx3okj52ks4wtad.onion  Updated: 05 Dec, 2025, 10:16 UTC  ](http://lockbit3753ekiocyo5epmpy6klmejchjtzddoekjlnt6mu3qh4de2id.onion/post/Z4TENkdajdrO2dbx6932b0f72d10f) [ Cash in on big wins this tax season! Every hour from 5 - 9 pm, one lucky winner will snag $1,040 in CASH or Free Play! Earn just 25 points, print your voucher at a kiosk, and drop it in the drawing barrel for your shot at a hefty payout!  Updated: 24 Apr, 2025, 11:09 UTC  ](http://lockbit3753ekiocyo5epmpy6klmejchjtzddoekjlnt6mu3qh4de2id.onion/post/0ExUTjl9SZBWFqzh680a1beb5c857) [ Managing capital on behalf of institutional investors, family offices, and high net worth individuals. We focus on niche commodities strategies with an emphasis on the energy transition.  Updated: 23 Apr, 2025, 11:08 UTC  ](http://lockbit3753ekiocyo5epmpy6klmejchjtzddoekjlnt6mu3qh4de2id.onion/post/BtTEmcA14uQIPZv76808ca399f414) [ E' definito molto più di un registratore di cassa. Nettun@ 3000 Touch Olivetti effettivamente concede agli esercenti una serie di opportunità che altri…

Data the group says was taken

corporate_data

Sources

Leak posthttp://lockbit3753ekiocyo5epmpy6klmejchjtzddoekjlnt6mu3qh4de2id.onion

Source

Indexed 2 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.

Disclosure context

About LockBit

Timeline of this disclosure

Other recent disclosures by LockBit

Sector and geography

Status timeline

At a glance

About the victim

Attack summary

Data the group says was taken

What the group claims

The leak post

Data the group says was taken

Sources

Source