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Cementos Bio-Bio

Claimed by Blackbyte · listed 3 years ago

39m
Age
since listed · data leaked

Status timeline

  1. ListedApr 9, 2023
  2. Data leakeddate unknown

At a glance

Group
Blackbyte
Status
Data leaked
Country
Chile
Sector
Manufacturing
Listed on leak site
Apr 9, 2023

About the victim

AI dossier — public-source company profile

Cementos Bío Bío S.A. is a Chilean company that manufactures and sells cement, clinker, pozzolana, gypsum, and concrete products for housing, buildings, pavement, infrastructure, and mining projects. It operates domestically in Chile and internationally, with facilities including locations in Providencia (Santiago) and Talcahuano (Bío Bío region). The company also operates in lime (cales) and ready-mix concrete (hormigones) business segments.

Industry
Cement & Concrete Manufacturing
Address
Avenida Andrés Bello 2457, Piso 18, Edificio Costanera Center, Providencia, Región Metropolitana, Chile

Attack summary

Severity: high — Data has been published by the ransomware group, confirming exfiltration of significant business data from a publicly listed industrial company with investor relations and supplier/client portal information at risk.

BlackByte claims to have compromised Cementos Bio-Bio S.A. and has published data (disclosed status: 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
  • Company business data
  • Investor documents
  • Supplier portal data
  • Client portal data
  • Internal corporate records

What the group claims

Cementos Bio Bio S.A. manufactures and sells cement in Chile and internationally. It provides clinker, pozzolana, gypsum, pozzolanic portland, and other cement; and concrete products for housing, buildings, pavement, infrastructure, and mining projects.

Sources

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.

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Disclosure context

About Blackbyte

BlackByte is a ransomware-as-a-service (RaaS) operation that emerged in October 2021, primarily motivated by financial gain through double extortion tactics targeting organizations across multiple sectors. The group is suspected to operate from Russia or former Soviet states based on their use of Russian-language forums and avoidance of targeting organizations in Commonwealth of Independent States countries, though they maintain no confirmed links to other established ransomware families. BlackByte operators typically gain initial access through vulnerable Microsoft Exchange servers, phishing campaigns, and exploitation of remote desktop protocol (RDP) services, employing tools such as Cobalt Strike for lateral movement and data exfiltration before deploying their custom ransomware payload that uses AES-256 encryption with RSA-2048 key protection. The group has demonstrated particular focus on critical infrastructure sectors, with the FBI and CISA issuing joint advisories in February 2022 highlighting attacks against organizations in government, healthcare, manufacturing, and education sectors, including notable incidents affecting San Francisco's transportation authority and multiple healthcare systems across the United States. BlackByte remains active as of 2024, continuing to evolve their tactics and maintain their leak site for publishing stolen data from victims who refuse to pay ransoms. The group has been linked to 147 public disclosures across our corpus. First observed on a leak site on October 4, 2021; most recent post July 30, 2025. The operation is currently inactive.

Timeline of this disclosure

  • April 9, 2023Cementos Bio-Bio listed by Blackbyteon the group's public leak site

Other recent disclosures by Blackbyte

Blackbyte has been linked to 147 public victims on Darkfield. A sample of the most recent:

See the full Blackbyte 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, Cementos Bio-Bio is reported in Chile, a country with 16 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Blackbyte means Cementos Bio-Bio 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.
  • Monitor for the data appearing on Blackbyte'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.