Was cisd.org hit by ransomware?

cisd.org was listed by the RansomHub ransomware operation (United States), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the RansomHub ransomware group?

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

What data was leaked in the cisd.org breach?

RansomHub published data attributed to cisd.org. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Corsicana Independent School District

listed as cisd.org · Claimed by RansomHub · listed 1 year ago

15m

Age

since listed · data leaked

Status timeline

ListedMar 24, 2025
Data leakeddate unknown

At a glance

Group: RansomHub
Status: Data leaked
Country: United States
Sector: Education
Listed on leak site: Mar 24, 2025

About the victim

AI dossier — public-source company profile

Corsicana Independent School District (CISD) is a public school district serving the Corsicana, Texas area. The district operates multiple elementary schools, intermediate, middle, and high schools, offering comprehensive K-12 education with special programs including special education, dyslexia services, and early childhood programs.

Industry: Public K-12 Education
Address: Corsicana, Texas, United States

Attack summary

Severity: high — Public school district with access to sensitive student and employee data, including minors' PII and educational records. Confirmed data publication by RansomHub indicates exfiltration occurred. Educational institutions serving minors represent high-sensitivity targets.

RansomHub claims to have compromised Corsicana ISD. The specific nature of the attack (encryption, exfiltration, or both) and the data categories involved are not detailed in the available leak post excerpt.

high

Data the group says was taken

AI dossier — extracted from the leak post

Student records
Employee personnel files
Financial/payroll data
Administrative documents

Original description

AI-summarised, not from the leak post

N/A

Sources

Victim sitecisd.org
Leak posthttp://ransomxifxwc5eteopdobynonjctkxxvap77yqifu2emfbecgbqdw6qd.onion/e72b989b-b574-4b4c-9de3-5b1566ac2492/

Source

Indexed 1 year 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 RansomHub

RansomHub is a financially-motivated ransomware group that emerged in February 2024 and has rapidly established itself as a significant threat, compromising over 1,000 victims within its first year of operation. The group operates as a Ransomware-as-a-Service (RaaS) model, though their specific country of origin and potential affiliations with other cybercriminal organizations remain under investigation by security researchers. RansomHub employs double extortion tactics, stealing sensitive data before encrypting victims' systems and threatening to leak the information if ransom demands are not met, with their attacks primarily targeting organizations in the United States, Brazil, Canada, United Kingdom, and Italy. The group has demonstrated a particular focus on business services, technology, manufacturing, and healthcare sectors, suggesting they prioritize targets with both high revenue potential and critical operational dependencies that increase the likelihood of ransom payment. Despite their recent emergence, RansomHub has quickly gained notoriety for their aggressive targeting approach and high victim count, with security agencies including CISA and FBI monitoring their activities as part of ongoing ransomware threat assessments. As of current reporting, RansomHub remains active and continues to recruit affiliates for their RaaS operation while expanding their victim base across multiple industries and geographic regions. The group has been linked to 1,032 public disclosures across our corpus. First observed on a leak site on February 10, 2024; most recent post March 31, 2025. The operation is currently inactive.

Also tracked as: RANSOM HUB.

Timeline of this disclosure

March 24, 2025cisd.org listed by RansomHubon the group's public leak site

Other recent disclosures by RansomHub

RansomHub has been linked to 1,032 public victims on Darkfield. A sample of the most recent:

See the full RansomHub dossier →

Sector and geography

This disclosure adds to ransomware activity in the Education sector, which has 1,082 disclosures indexed across all operators we track. Geographically, cisd.org is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by RansomHub means cisd.org 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 RansomHub'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.