Was Bay Area Rapid Transit hit by ransomware?

Bay Area Rapid Transit was listed by the Vicesociety 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 Vicesociety ransomware group?

Vicesociety 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 Bay Area Rapid Transit breach?

Vicesociety published data attributed to Bay Area Rapid Transit. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Bay Area Rapid Transit

Claimed by Vicesociety · listed 4 years ago

42m

Age

since listed · data leaked

Status timeline

ListedJan 6, 2023
Data leakeddate unknown

At a glance

Group: Vicesociety
Status: Data leaked
Country: United States
Sector: Transportation & Logistics
Listed on leak site: Jan 6, 2023

About the victim

AI dossier — public-source company profile

Bay Area Rapid Transit (BART) is a heavy-rail public transit agency serving the San Francisco Bay Area, operating 131 miles of track across 50 stations in five counties. It connects the San Francisco Peninsula with East Bay and South Bay communities, carrying approximately 405,000 trips on an average weekday. BART is a government-run regional transit district operating under public authority.

Industry: Public Heavy-Rail Transit
Address: 300 Lakeside Drive, Oakland, CA 94612
Employees: 3500
Founded: 1957

Attack summary

Severity: critical — BART is a critical public infrastructure operator serving hundreds of thousands of daily riders; Vice Society is known for publishing stolen data, and the disclosed status is data_published, indicating confirmed exfiltration from a government/public-sector critical infrastructure entity likely containing employee PII, operational data, and potentially sensitive security or financial records.

Vice Society claims to have exfiltrated data from BART's systems, with the disclosure status listed as data_published, indicating stolen data has been released. No ransom amount was stated and no specific data volume was disclosed in the post.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Internal BART documents
Employee records
Operational data
Financial records
Potentially personally identifiable information

What the group claims

The San Francisco Bay Area Rapid Transit District is a heavy-rail public transit system that connects the San Francisco Peninsula with communities in the East Bay and South Bay. BART operates in five counties with 131 miles of track and 50 stations, carrying approximately 405,000 trips on an average weekday.

Sources

Victim sitebart.gov/

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 Vicesociety

Vicesociety is a ransomware group that emerged in May 2021, primarily motivated by financial gain through targeting critical infrastructure and public service organizations. The group's origin and specific affiliations remain largely undetermined by public threat intelligence reporting, though their operational patterns suggest they function as an independent ransomware operation rather than a established RaaS model. Vicesociety primarily gains initial access through exploitation of public-facing applications and credential-based attacks, with documented cases showing they particularly focus on compromising remote access services and vulnerable web applications before deploying their ransomware payload across victim networks. The group has demonstrated a clear preference for targeting educational institutions, government agencies, and healthcare organizations, with their 188 documented victims concentrated heavily in the United States, United Kingdom, Germany, Australia, and Spain, indicating a focus on English-speaking and Western European entities. While specific high-profile campaigns have not been extensively detailed in major public threat intelligence reports from CISA or FBI advisories, the group's consistent targeting of critical sectors like education and healthcare has drawn attention from security researchers monitoring threats to essential services. Vicesociety remains active as of recent threat intelligence assessments, continuing their operations against similar target sectors with no documented law enforcement disruption or significant operational changes. The group has been linked to 188 public disclosures across our corpus. First observed on a leak site on May 31, 2021; most recent post June 20, 2023. The operation is currently inactive.

Also tracked as: VICE SOCIETY.

Timeline of this disclosure

January 6, 2023Bay Area Rapid Transit listed by Vicesocietyon the group's public leak site

Other recent disclosures by Vicesociety

Vicesociety has been linked to 188 public victims on Darkfield. A sample of the most recent:

See the full Vicesociety dossier →

Sector and geography

This disclosure adds to ransomware activity in the Transportation & Logistics sector, which has 180 disclosures indexed across all operators we track. Geographically, Bay Area Rapid Transit is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Vicesociety means Bay Area Rapid Transit 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 Vicesociety'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.