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Calumet Civil Contractors, Inc.

Claimed by 8Base · listed 2 years ago

26m
Age
since listed · data leaked

Status timeline

  1. ListedMay 2, 2024
  2. Data leakeddate unknown

At a glance

Group
8Base
Status
Data leaked
Country
India
Sector
Business Services
Listed on leak site
May 2, 2024

About the victim

AI dossier — public-source company profile

Calumet Civil Contractors, Inc. performs site development and road construction services, operating primarily in the Indianapolis area. The company operates via calumetcivil.com.

Industry
Civil Construction & Site Development
Address
Indianapolis area

Attack summary

Severity: medium — Data exfiltration confirmed (disclosed status: data_published) but no specific sensitive data types, volume, or proof files are described in the leak post. No ransom amount stated; no operational disruption claimed.

8Base claims to have breached Calumet Civil Contractors and exfiltrated data. The specific data categories and operational impact are not detailed in the available leak post.

medium

Data the group says was taken

AI dossier — extracted from the leak post
  • business records
  • company data

What the group claims

Calumet Civil Contractors performs all phases of site development and road construction, primarily in the Indianapolis area.calumetcivil.com

Sources

Source

Indexed 2 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 8Base

8Base is a ransomware group that emerged in May 2023, operating with primarily financial motivations and demonstrating a rapid escalation in activity with 458 documented victims across multiple sectors. The group's origin and specific affiliations remain largely undocumented by major security agencies, though their operational patterns suggest they function as an independent ransomware operation targeting predominantly Western markets. Based on publicly available victim data, 8Base appears to focus on opportunistic attacks against business services and manufacturing sectors, with the United States representing their primary target geography, followed by France, Brazil, Italy, and the United Kingdom, indicating a preference for developed economies with established digital infrastructure. The group has notably impacted healthcare and technology sectors alongside their primary business services focus, suggesting a broad targeting approach rather than sector-specific specialization. Given the group's recent emergence in 2023 and continued victim accumulation across diverse geographic and sectoral targets, 8Base appears to remain active as of current reporting periods, though detailed technical methodologies, specific attack vectors, and notable high-profile campaigns have not been extensively documented in public threat intelligence reporting from major security agencies. The group has been linked to 458 public disclosures across our corpus. First observed on a leak site on May 23, 2023; most recent post February 1, 2025. The operation is currently inactive.

Timeline of this disclosure

  • May 2, 2024Calumet Civil Contractors, Inc. listed by 8Baseon the group's public leak site

Other recent disclosures by 8Base

8Base has been linked to 458 public victims on Darkfield. A sample of the most recent:

See the full 8Base dossier →

Sector and geography

This disclosure adds to ransomware activity in the Business Services sector, which has 3,796 disclosures indexed across all operators we track. Geographically, Calumet Civil Contractors, Inc. is reported in India, a country with 381 ransomware disclosures in our corpus.

If your organisation is affected

A listing by 8Base means Calumet Civil Contractors, Inc. 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-In (India), as required for your jurisdiction.
  • Monitor for the data appearing on 8Base'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.