Was cs.at hit by ransomware?

cs.at was listed by the lockbit5 ransomware operation (Austria), 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 lockbit5 ransomware group?

lockbit5 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 cs.at breach?

lockbit5 published data attributed to cs.at. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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CS Caritas Socialis

listed as cs.at · Claimed by Lockbit5 · listed 4 months ago

Age

since listed · data leaked

Status timeline

ListedFeb 14, 2026
Data leakeddate unknown

At a glance

Group: Lockbit5
Status: Data leaked
Country: Austria
Sector: Technology
Listed on leak site: Feb 14, 2026

About the victim

AI dossier — public-source company profile

CS Caritas Socialis is an Austrian Catholic charitable organisation based in Vienna that provides a comprehensive range of nursing and care services. Its offerings include home care, day centres for seniors, long-term residential care, Alzheimer and dementia specialist facilities, hospice services, multiple sclerosis care, kindergartens, and a mother-and-child shelter. It operates multiple specialist facilities across Vienna and is a significant non-profit healthcare provider in Austria.

Industry: Healthcare & Social Services (Nursing, Hospice & Elderly Care)
Address: Vienna, Austria

Attack summary

Severity: critical — CS Caritas Socialis handles highly sensitive medical, personal, and social care data for vulnerable populations including elderly, terminally ill, dementia, MS, and domestic-violence-affected individuals. Data publication by the group indicates confirmed exfiltration of what is almost certainly regulated health and personal data (PII at scale, medical records) for a healthcare/social-care provider, meeting the critical threshold.

LockBit 5 claims to have attacked CS Caritas Socialis and has published data (disclosed status: data_published), suggesting exfiltration of organisational data. The specific data categories and volume have not been detailed in the available leak post excerpt.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Patient/resident care records
Personal health information
Employee records
Organisational/administrative documents
Donor and financial records

What the group claims

CS Pflege & Betreuung Die CS Caritas Socialis bietet Pflege- und Betreuungsangebote aus einer Hand:...

Sources

Victim sitecs.at
Leak posthttp://lockbitapt67g6rwzjbcxnww5efpg4qok6vpfeth7wx3okj52ks4wtad.onion/post/7498b53ee40b9dd9708b3b6c289494a7

Source

Indexed 4 months 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 lockbit5

Based on the provided data, LockBit5 appears to be a recently emerged ransomware operation first observed in December 2025, representing what may be a new iteration or rebrand within the LockBit ransomware ecosystem, with primary financial motivations evidenced by their targeting of high-value sectors. Given the LockBit naming convention and the timing of emergence, this group likely operates from Eastern Europe or Russia and may represent either a continuation of previous LockBit operations or a new affiliate group leveraging the established LockBit brand, though specific organizational details remain undocumented by major security agencies. While detailed attack methodologies have not been publicly documented by CISA, FBI, or major security researchers, the group's targeting pattern across 157 victims suggests a broad-spectrum approach focusing on technology, manufacturing, healthcare, and transportation sectors primarily in the United States, Brazil, Germany, Italy, and Mexico. Due to the group's recent emergence in December 2025, there are no publicly documented notable campaigns or major incidents reported by established threat intelligence sources, though the victim count indicates active operations. The group appears to be currently active based on the recent first observation date, though comprehensive analysis from major security agencies has not yet been published given the short timeframe since emergence. The group has been linked to 278 public disclosures across our corpus. First observed on a leak site on December 7, 2025; most recent post June 11, 2026. The operation is currently active.

Timeline of this disclosure

February 14, 2026cs.at listed by lockbit5on the group's public leak site

Other recent disclosures by lockbit5

lockbit5 has been linked to 278 public victims on Darkfield. A sample of the most recent:

See the full lockbit5 dossier →

Sector and geography

This disclosure adds to ransomware activity in the Technology sector, which has 2,526 disclosures indexed across all operators we track. Geographically, cs.at is reported in Austria, a country with 5 ransomware disclosures in our corpus.

If your organisation is affected

A listing by lockbit5 means cs.at 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.
Monitor for the data appearing on lockbit5'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.