Was soundtransit.org hit by ransomware?

soundtransit.org was listed by the Braincipher 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 Braincipher ransomware group?

Braincipher 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 soundtransit.org breach?

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

Ransomware victim disclosure

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soundtransit.org

Claimed by Braincipher · listed 1 year ago

14m

Age

since listed · data leaked

Status timeline

ListedMay 5, 2025
Data leakeddate unknown

At a glance

Group: Braincipher
Status: Data leaked
Country: United States
Sector: Transportation/Logistics
Listed on leak site: May 5, 2025

About the victim

AI dossier — public-source company profile

Sound Transit is a regional public transit agency serving the Seattle metropolitan area in Washington state. It operates multiple transportation modes including Link Light Rail, Sounder Commuter Rail, and ST Express buses across King, Pierce, and Snohomish counties. The agency is voter-supported and manages the Sound Transit 3 (ST3) capital program with a projected $34.5 billion funding gap through 2046.

Industry: Public Transit & Mass Transportation
Address: Seattle, Washington, USA (serves King, Pierce, and Snohomish counties)
Founded: 1996

Attack summary

Severity: medium — Data has been published by the threat actor (disclosed_status: data_published), indicating confirmed exfiltration. However, no specific data inventory, proof count, or details about data sensitivity are provided in the post excerpt. Given the critical nature of public transit infrastructure and potential operational impact, but without confirmation of sensitive PII or regulatory data at scale, medium severity is appropriate pending fuller disclosure review.

Braincipher claims to have breached Sound Transit's systems. The group has disclosed data from the attack, but specific details about what was exfiltrated, encrypted, or compromised are not provided in the available post excerpt.

medium

Data the group says was taken

AI dossier — extracted from the leak post

Unknown—no specific data types disclosed in post

Original description

AI-summarised, not from the leak post

Sound Transit, operating under the domain "soundtransit.org", is a mass transit agency serving the Seattle, Washington, USA, metropolitan area. Founded in 1996, it offers public transit services including bus, light rail, and commuter rail services throughout King, Pierce, and Snohomish counties. Its major transportation systems include Link Light Rail, Sounder Commuter Rail, and ST Express buses.

Sources

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 Braincipher

Braincipher is a recently emerged ransomware group that was first observed in July 2024, operating with apparent financial motivations and targeting organizations primarily across North America and Europe. The group's origin and potential affiliations remain largely undocumented by major threat intelligence organizations, though their targeting patterns suggest a broad opportunistic approach rather than nation-state backing, likely operating as an independent entity rather than through established ransomware-as-a-service infrastructure. Their attack methodology and specific technical capabilities have not been extensively documented by CISA, FBI, or major security research firms, though their victim distribution across 44 confirmed targets spanning business services, manufacturing, technology, and healthcare sectors indicates a generalist approach to target selection rather than sector-specific expertise. No major high-profile campaigns or significant law enforcement actions have been publicly documented against this group by reputable sources, suggesting either a relatively low-impact operational scale or insufficient intelligence collection on their activities. As of current reporting, the group's operational status remains unclear due to limited public documentation from established threat intelligence sources. The group has been linked to 69 public disclosures across our corpus. First observed on a leak site on July 1, 2024; most recent post July 9, 2026. The operation is currently active.

Also tracked as: brain cipher.

Timeline of this disclosure

May 5, 2025soundtransit.org listed by Braincipheron the group's public leak site

Other recent disclosures by Braincipher

Braincipher has been linked to 69 public victims on Darkfield. A sample of the most recent:

See the full Braincipher dossier →

Sector and geography

This disclosure adds to ransomware activity in the Transportation/Logistics sector, which has 1,081 disclosures indexed across all operators we track. Geographically, soundtransit.org is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Braincipher means soundtransit.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 Braincipher'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.