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Mangueira Indústria e Comércio de Tubos e Aços Especiais Ltda.

listed as www.mercantetubos.com.br · Claimed by Alphalocker · listed 9 months ago

9m
Age
since listed · data leaked

Status timeline

  1. ListedOct 13, 2025
  2. Data leakeddate unknown

At a glance

Group
Alphalocker
Status
Data leaked
Country
Brazil
Sector
Manufacturing
Listed on leak site
Oct 13, 2025

About the victim

AI dossier — public-source company profile

Mangueira Indústria e Comércio de Tubos e Aços Especiais Ltda. was founded on October 3, 1972 in Brazil, originally to import DIN ST 52 steel mechanical tubes. The company later became a distributor of DIN ST 52 mechanical tubes through Mannesmann S.A. and operates in the steel tube and special steels trading and manufacturing sector.

Industry
Steel & Mechanical Tube Distribution / Manufacturing
Founded
1972

Attack summary

Severity: medium — Data is stated as published (disclosed status confirmed), indicating exfiltration occurred, but no specific data categories, volume, or regulated/sensitive data types (e.g. PII at scale, medical, financial) are enumerated in the post for this specific victim.

The Alphalocker group claims to have exfiltrated data from Mangueira Indústria e Comércio de Tubos e Aços Especiais Ltda. and has published it on their leak site. The specific data categories and volume are not detailed in the truncated post.

medium

What the group claims

Mangueira Indústria e Comércio de Tubos e Aços Especiais Ltda. was founded on October 3, 1972, with the objective of importing DIN ST 52 steel mechanical tubes. Later, when Mannesmann S.A. began industrializing this product line, Mangueira obtained a distribution quota for DIN ST 52 mechanical tu... Read more ⇒

The leak post

captured from the group's site
Blog ⇐ Enter system   Next page ⇒ https://www.pyramisgroup.com The data has been published PYRAMIS METALLOURGIA S.A. PYRAMIS is the only producer of household electrical appliances in Greece, and at the same time, a Global Champion with presence in more than 85 countries and exports exceeding 97% of its production. PASSWORD for files - @m@0810#! https://www.bew.co.th The data has been published Bangkok Eagle Wings Co.,Ltd. 67/14 Mu 5 Chuamsamphan Rd. Kokfad. Nongchok. Bangkok 10530. Thailand. Stamping process Welding and assembly process Machining process Painting process www.automotiveml.com The data has been published With over 70 years of rich experience serving in the auto industry, they are one of India's largest car dealerships. https://www.unterkofler.info The data has been published 117 GB data has stolen Bakery and confectionery 5611 Grossarl | Marktstr. 109 +43 (0) 6414 / 2760 www.verdugohillsdental.com The data has been published At Verdugo Hills Dental in Glendale, CA, our experienced team is committed to more than just dentistry—we’re here to ensure your comfort and overall well-being every step of the way. From routine check-ups to advanced restorative …

Sources

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 Alphalocker

Alphalocker is a relatively new ransomware group that emerged in January 2024, operating with apparent financial motivations based on their targeting patterns across multiple sectors and countries. The group's origin and affiliations remain unclear due to limited public documentation from major threat intelligence sources, though their global targeting suggests a sophisticated operation. With 31 documented victims primarily concentrated in the United States, United Kingdom, Thailand, Brazil, and Italy, Alphalocker appears to focus on business services, technology, manufacturing, and healthcare sectors, indicating they likely seek targets with both valuable data and the financial capacity to pay ransoms. The group's attack methodology, encryption techniques, and specific tactics have not been extensively documented by major security researchers or government agencies, suggesting either operational security measures that limit visibility into their methods or their relative novelty in the threat landscape. Given the limited public reporting on notable campaigns or high-profile attacks, Alphalocker appears to operate below the radar of major law enforcement initiatives that typically target more established ransomware operations. The group remains active as of available intelligence, though the lack of comprehensive public analysis from established threat intelligence firms suggests they may be a smaller-scale operation or one that has successfully maintained a lower profile compared to more notorious ransomware families. The group has been linked to 61 public disclosures across our corpus. First observed on a leak site on January 24, 2024; most recent post May 30, 2026. The operation is currently active.

Also tracked as: Alpha Ransomware.

Timeline of this disclosure

  • October 13, 2025www.mercantetubos.com.br listed by Alphalockeron the group's public leak site

Other recent disclosures by Alphalocker

Alphalocker has been linked to 61 public victims on Darkfield. A sample of the most recent:

See the full Alphalocker 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, www.mercantetubos.com.br is reported in Brazil, a country with 404 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Alphalocker means www.mercantetubos.com.br 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, CERT.br (Brazil), as required for your jurisdiction.
  • Monitor for the data appearing on Alphalocker'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.