Who is the LockBit ransomware group?

LockBit is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

Ransomware victim disclosure

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

Claimed by LockBit · listed 4 months ago

Age

since listed · listed for ransom

Status timeline

ListedMar 29, 2026

Current state: Listed for ransom

At a glance

Group: LockBit
Status: Listed for ransom
Country: Brazil
Sector: Professional Association
Listed on leak site: Mar 29, 2026

About the victim

AI dossier — public-source company profile

AEA-MG (Associação dos Eletricistas e Empregados da CEMIG e suas Subsidiárias) is a Brazilian professional association and trade union founded on 29 January 1983 by electricians working at CEMIG (Companhia Energética de Minas Gerais) and its subsidiaries. It represents the interests of electricians and employees in the state electricity sector in Minas Gerais, Brazil. As a membership organisation tied to a major state-owned power utility, it likely holds personal and employment-related data on its members.

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

Attack summary

Severity: medium — The victim is a professional association connected to a critical-infrastructure energy utility (CEMIG), meaning member PII and employment records are likely at risk. However, the post is an initial listing only with no proof files, no stated data volume, and no confirmed exfiltration details published, preventing a higher severity rating.

LockBit claims to have listed AEA-MG as a victim on their leak blog as of 16 April 2025. The post provides only a brief company description with no explicit mention of encryption, exfiltration volume, or proof files published at the time of listing.

medium

What the group claims

Association of electricians 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…

Sources

Leak posthttp://lockbit3753ekiocyo5epmpy6klmejchjtzddoekjlnt6mu3qh4de2id.onion

Source

Indexed 4 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 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 and its Subsidiaries) listed by LockBiton the group's public leak site

Other recent disclosures by LockBit

LockBit has been linked to 3,536 public victims on Darkfield. A sample of the most recent:

See the full LockBit dossier →

Sector and geography

This disclosure adds to ransomware activity in the Professional Association sector. Geographically, AEA-MG (Association of Electricians and Employees of CEMIG and its Subsidiaries) is reported in Brazil, a country with 404 ransomware disclosures in our corpus.

If your organisation is affected

A listing by LockBit means AEA-MG (Association of Electricians and Employees of CEMIG and its Subsidiaries) appeared on a ransomware extortion site and is being pressured to pay before any publication. 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, CERT.br (Brazil), as required for your jurisdiction.
Monitor for the data appearing on LockBit'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.