Disclosure context

About rhysida

Rhysida is a ransomware group that emerged in June 2023, operating with primarily financial motivations through targeted attacks against critical infrastructure and public sector organizations. The group's origin and potential state affiliations remain unclear, though they operate independently rather than as a traditional Ransomware-as-a-Service model, with limited public documentation regarding connections to other cybercriminal organizations. Rhysida employs double extortion tactics, typically gaining initial access through compromised VPN credentials and exploiting vulnerable public-facing applications before deploying their ransomware payload and exfiltrating sensitive data prior to encryption. The group has demonstrated a particular focus on healthcare and educational institutions, with notable attacks documented by CISA and FBI advisories highlighting their targeting of hospitals and school districts across multiple countries, resulting in significant operational disruptions to critical services. As of late 2024, Rhysida remains an active threat with continued operations targeting organizations primarily in the United States, Canada, and other Western nations, maintaining their focus on high-value sectors where operational disruption can maximize ransom payment likelihood. The group has been linked to 278 public disclosures across our corpus. First observed on a leak site on June 5, 2023; most recent post May 20, 2026. The operation is currently active.

Timeline of this disclosure

May 19, 2026Landeshauptstadt Stuttgart listed by rhysidaon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Public Sector sector, which has 259 disclosures indexed across all operators we track. Geographically, Landeshauptstadt Stuttgart is reported in DE, a country with 333 ransomware disclosures in our corpus.

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.

Ransomware victim disclosure

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Landeshauptstadt Stuttgart

Claimed by rhysida · listed 2 days ago

Age

since listed · data leaked

Status timeline

Listed
May 19, 2026
Data leaked

At a glance

Group: rhysida
Status: Data leaked
Country: DE
Sector: Public Sector
Listed on leak site: May 19, 2026

About the victim

AI dossier — public-source company profile

Landeshauptstadt Stuttgart is the capital city of the state of Baden-Württemberg in southwestern Germany and one of the country's largest cities with a population of approximately 630,000. The city administration provides a wide range of public services including civil registration, social services, urban planning, public health, transport, and citizen engagement. It operates numerous municipal institutions including Klinikum Stuttgart (hospital), public baths, and cultural facilities.

Industry: Municipal Government Administration
Address: Marktplatz 1, 70173 Stuttgart, Baden-Württemberg, Germany
Employees: 10000+
Founded: 1219

Attack summary

Severity: critical — Stuttgart is a major state capital municipal government. An attack with confirmed data publication on a large public-sector entity of this scale almost certainly involves PII of hundreds of thousands of citizens, sensitive administrative records, and potentially health or social services data — all regulated categories under GDPR and German public law.

Rhysida claims to have attacked Landeshauptstadt Stuttgart and has published data (disclosed status: data_published), indicating exfiltration of data from the municipal government's systems. The leak post provides minimal detail on the specific data categories or volume exfiltrated.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Municipal government records
Citizen data
Administrative documents

What the group claims

Landeshauptstadt Stuttgart Stuttgart is the capital city of Baden-Wurttemberg in southwestern Germany.

Sources

Victim sitestuttgart.de

Source

Indexed 2 days 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.