Was polleninformation.at hit by ransomware?

polleninformation.at was listed by the Apt73 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 Apt73 ransomware group?

Apt73 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 polleninformation.at breach?

Apt73 published data attributed to polleninformation.at. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Österreichischer Polleninformationsdienst (polleninformation.at)

listed as polleninformation.at · Claimed by Apt73 · listed 3 months ago

Age

since listed · data leaked

Status timeline

ListedApr 27, 2026
Data leakeddate unknown

At a glance

Group: Apt73
Status: Data leaked
Country: Austria
Sector: Healthcare
Listed on leak site: Apr 27, 2026

About the victim

AI dossier — public-source company profile

Polleninformation.at is the Austrian Pollen Information Service (Österreichischer Polleninformationsdienst), a non-profit association providing pollen forecasts, allergy risk assessments, and related health information to the public across Austria and Europe. The service offers real-time pollen load maps, 4-day forecasts, asthma weather data, and diagnostic/therapeutic allergy guidance. It operates apps, a digital assistant, and a pollen diary service, suggesting a registered user base.

Industry: Environmental Health Information & Allergy Services

Attack summary

Severity: high — Confirmed exfiltration and publication of 22,140 user records containing personal information and passwords constitutes a significant PII breach affecting a large number of individuals, with data already published.

The group APT73 claims to have exfiltrated personal information and passwords from polleninformation.at, publishing 22,140 lines of user data, indicating a database dump containing user credentials and personal details.

high

Data the group says was taken

AI dossier — extracted from the leak post

Personal information (22,140 records)
Passwords / password hashes
User account data

The group's post references roughly 1 proof file.

What the group claims

Pollen situation informational site. Personal info + Pass. 22140 lines

Sources

Victim sitepolleninformation.at
Leak posthttp://basherq53eniermxovo3bkduw5qqq5bkqcml3qictfmamgvmzovykyqd.onion/page_company.php?id=90

Source

Indexed 3 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 Apt73

APT73 is a recently emerged ransomware group that began operations in April 2024, with financial motivation as their primary driver based on their targeting patterns across multiple high-value sectors. The group has demonstrated rapid growth in their operational tempo, accumulating 78 documented victims within their first months of activity. Their targeting methodology shows a preference for English-speaking markets and major economies, with the United Kingdom and United States representing their primary focus areas, followed by significant activity in India, Brazil, and France. The group exhibits a clear preference for high-value sectors including business services, technology, financial services, and healthcare organizations, suggesting a calculated approach to victim selection based on potential payment capability and operational impact. Given the group's recent emergence and limited public documentation from major threat intelligence sources, specific details regarding their initial access vectors, tooling, encryption methods, or organizational structure remain largely unconfirmed by authoritative sources such as CISA, FBI, or established security research firms. The group's current operational status appears active based on the timeline of their emergence, though comprehensive analysis of their capabilities and infrastructure requires additional intelligence gathering and documentation by security researchers. The group has been linked to 161 public disclosures across our corpus. First observed on a leak site on April 22, 2024; most recent post July 6, 2026. The operation is currently inactive.

Also tracked as: Eraleign.

Timeline of this disclosure

April 27, 2026polleninformation.at listed by Apt73on the group's public leak site

Other recent disclosures by Apt73

Apt73 has been linked to 161 public victims on Darkfield. A sample of the most recent:

See the full Apt73 dossier →

Sector and geography

This disclosure adds to ransomware activity in the Healthcare sector, which has 2,600 disclosures indexed across all operators we track. Geographically, polleninformation.at is reported in Austria, a country with 15 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Apt73 means polleninformation.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.
Report the incident to your national CERT, CERT.at (Austria), as required for your jurisdiction.
Monitor for the data appearing on Apt73'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.