Was Transunion hit by ransomware?

Transunion was listed by the Ransomedvc 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 Ransomedvc ransomware group?

Ransomedvc 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 Transunion breach?

Ransomedvc published data attributed to Transunion. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Transunion

Claimed by Ransomedvc · listed 3 years ago

35m

Age

since listed · data leaked

Status timeline

ListedAug 23, 2023
Data leakeddate unknown

At a glance

Group: Ransomedvc
Status: Data leaked
Country: United States
Sector: Financial Services
Listed on leak site: Aug 23, 2023

About the victim

AI dossier — public-source company profile

TransUnion is one of the three major consumer credit reporting bureaus in the United States, headquartered in Chicago, Illinois. The company collects and aggregates financial and personal data on hundreds of millions of consumers globally, providing credit reports, risk scores, fraud detection, and data analytics services to lenders, insurers, and other businesses. TransUnion operates in over 30 countries and serves a large portion of the global credit market.

Industry: Consumer Credit Reporting & Data Analytics
Address: 555 W Adams St, Chicago, IL 60661, United States
Employees: 10000+
Founded: 1968

Attack summary

Severity: critical — TransUnion is a major credit bureau holding highly sensitive regulated PII and financial data on hundreds of millions of consumers; any confirmed exfiltration from such an entity constitutes a critical-severity incident regardless of data volume specifics.

RansomedVC claimed an attack on TransUnion with a disclosed/published data status, though no specific leak post content, ransom demand, or data size was captured. The nature of the claimed action (encryption, exfiltration, or both) cannot be confirmed from available information.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Consumer credit records
Personally identifiable information (PII)
Financial data
Credit scores and reports
Business client data

Sources

Victim sitetransunion.com

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 Ransomedvc

Ransomedvc is a financially-motivated ransomware group that emerged in August 2023, representing one of the newer entrants in the ransomware ecosystem with a documented victim count of 68 organizations. Given the group's recent emergence and limited public documentation from major cybersecurity organizations, specific details about their country of origin and operational structure remain unclear, though their targeting patterns suggest they operate as an independent group rather than a established RaaS operation. The group demonstrates a preference for targeting critical infrastructure sectors, particularly focusing on Food & Agriculture and Healthcare organizations across a geographically diverse range of countries including Bulgaria, Brazil, Japan, Australia, and Russia, indicating either a broad opportunistic approach or the use of automated scanning tools to identify vulnerable systems. While comprehensive details about their specific attack methodologies, encryption techniques, and whether they employ double or triple extortion tactics have not been extensively documented by major threat intelligence firms, their targeting of healthcare and food sector organizations suggests they may leverage the critical nature of these services to pressure victims into payment. The group's notable campaign activity appears concentrated in their operational period since mid-2023, though no major high-profile attacks or significant law enforcement actions have been publicly reported by CISA, FBI, or other authoritative sources. Ransomedvc appears to remain active as of the latest available intelligence, though their relatively recent emergence means their long-term operational patterns and potential for rebranding or law enforcement disruption remain to be observed. The group has been linked to 68 public disclosures across our corpus. First observed on a leak site on August 21, 2023; most recent post October 30, 2023. The operation is currently inactive.

Timeline of this disclosure

August 23, 2023Transunion listed by Ransomedvcon the group's public leak site

Other recent disclosures by Ransomedvc

Ransomedvc has been linked to 68 public victims on Darkfield. A sample of the most recent:

See the full Ransomedvc dossier →

Sector and geography

This disclosure adds to ransomware activity in the Financial Services sector, which has 1,184 disclosures indexed across all operators we track. Geographically, Transunion is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Ransomedvc means Transunion 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 Ransomedvc'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.