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Jasper County Sheriff's Office

listed as www.jaspercountysheriffoffice.com · Claimed by Onyx · listed 4 years ago

44m
Age
since listed · data leaked

Status timeline

  1. ListedNov 21, 2022
  2. Data leakeddate unknown

At a glance

Group
Onyx
Status
Data leaked
Country
United States
Sector
Government
Listed on leak site
Nov 21, 2022

About the victim

AI dossier — public-source company profile

The Jasper County Sheriff's Office is a county law enforcement agency located in Newton, Illinois, serving Jasper County. It operates 24/7 and is responsible for maintaining public peace, enforcing laws, managing the county jail, and protecting the constitutional rights of citizens. The office is led by Sheriff Brandon Francis.

Industry
Law Enforcement & Public Safety
Address
106 E. Morgan Street, Newton, IL 62448

Attack summary

Severity: critical — The victim is a county law enforcement agency (government/public safety sector) with data_published status. Law enforcement offices hold regulated sensitive data including PII of arrested individuals, detainee records, criminal investigation files, and staff personal information — constituting regulated/sensitive data at scale with serious public safety implications.

The Onyx ransomware group claims to have attacked the Jasper County Sheriff's Office, with the disclosure status listed as data_published. No specific details about encryption, exfiltration methods, or the nature of published data are available from the captured leak post.

critical

Data the group says was taken

AI dossier — extracted from the leak post
  • Law enforcement records
  • Arrest reports
  • Jail records
  • Personal data of detainees and staff
  • Internal government communications

Sources

Source

Indexed 4 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 Onyx

Onyx is a ransomware group that emerged in April 2022, primarily motivated by financial gain through extortion operations targeting organizations across North and South America. The group's country of origin and potential affiliations with other ransomware operations remain undetermined based on publicly available threat intelligence. Onyx has demonstrated a preference for targeting government and transportation sector entities, with their attack methodology and technical capabilities including initial access vectors, encryption methods, and data exfiltration practices not comprehensively documented in open-source intelligence reports from major cybersecurity firms or government agencies. The group has compromised 28 known victims, with the majority of their operations concentrated in the United States, Brazil, and Mexico, suggesting either a geographic targeting preference or regional access capabilities. Due to Onyx being a relatively smaller ransomware operation with limited public documentation from established threat intelligence sources like CISA, FBI, or major security research organizations, detailed information about specific notable campaigns, ransom demands, or high-profile victim organizations has not been extensively reported in public threat assessments. The current operational status of the Onyx ransomware group remains unclear based on available open-source intelligence reporting. The group has been linked to 28 public disclosures across our corpus. First observed on a leak site on April 29, 2022; most recent post November 21, 2022. The operation is currently inactive.

Timeline of this disclosure

  • November 21, 2022www.jaspercountysheriffoffice.com listed by Onyxon the group's public leak site

Other recent disclosures by Onyx

Onyx has been linked to 28 public victims on Darkfield. A sample of the most recent:

See the full Onyx dossier →

Sector and geography

This disclosure adds to ransomware activity in the Government sector, which has 685 disclosures indexed across all operators we track. Geographically, www.jaspercountysheriffoffice.com is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Onyx means www.jaspercountysheriffoffice.com 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, CISA (United States), as required for your jurisdiction.
  • Monitor for the data appearing on Onyx'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.