Was A1 hit by ransomware?

A1 was listed by the Ransomedvc 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 Ransomedvc ransomware group?

Ransomedvc 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 A1 breach?

Ransomedvc published data attributed to A1. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

← All victims

A1 Group

listed as A1 · Claimed by Ransomedvc · listed 3 years ago

35m

Age

since listed · data leaked

Status timeline

ListedAug 21, 2023
Data leakeddate unknown

At a glance

Group: Ransomedvc
Status: Data leaked
Country: Austria
Sector: Technology
Listed on leak site: Aug 21, 2023

About the victim

AI dossier — public-source company profile

A1 Group is a leading telecommunications and digitalization company headquartered in Vienna, Austria, serving 30 million customers across 7 core markets in Central and Eastern Europe. The company offers voice telephony, broadband internet, mobile and home entertainment, smart home, data and IT solutions, wholesale, payment solutions and digital services. It is publicly listed on the Vienna Stock Exchange and reported revenues of 5.6 billion EUR in 2025.

Industry: Telecommunications & ICT Services
Address: Lassallestraße 9, 1020 Vienna, Austria
Employees: 16000
Founded: 2000

Attack summary

Severity: high — A1 Group is a major telecommunications operator with 30 million customers across 7 countries; data_published status confirms exfiltration and release of data from a critical communications infrastructure provider, though the specific nature and volume of published data is not detailed in the post.

RansomedVC claims to have attacked A1 Group as a 'data provider', noting that 1 of 4 partial payments was made on 2023-08-23, suggesting partial ransom negotiation occurred. The post is classified as data_published, indicating exfiltration and publication of company data.

high

Data the group says was taken

AI dossier — extracted from the leak post

Corporate data
Potentially customer data
Internal business documents

What the group claims

A1 Data Provider (1/4 partial payments have been paid on 2023-08-23)

Sources

Victim sitea1.group

Source

Indexed 3 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 Ransomedvc

Ransomedvc is a financially-motivated ransomware group that emerged in August 2023, representing one of the newer entrants in the ransomware ecosystem with a documented victim count of 68 organizations. Given the group's recent emergence and limited public documentation from major cybersecurity organizations, specific details about their country of origin and operational structure remain unclear, though their targeting patterns suggest they operate as an independent group rather than a established RaaS operation. The group demonstrates a preference for targeting critical infrastructure sectors, particularly focusing on Food & Agriculture and Healthcare organizations across a geographically diverse range of countries including Bulgaria, Brazil, Japan, Australia, and Russia, indicating either a broad opportunistic approach or the use of automated scanning tools to identify vulnerable systems. While comprehensive details about their specific attack methodologies, encryption techniques, and whether they employ double or triple extortion tactics have not been extensively documented by major threat intelligence firms, their targeting of healthcare and food sector organizations suggests they may leverage the critical nature of these services to pressure victims into payment. The group's notable campaign activity appears concentrated in their operational period since mid-2023, though no major high-profile attacks or significant law enforcement actions have been publicly reported by CISA, FBI, or other authoritative sources. Ransomedvc appears to remain active as of the latest available intelligence, though their relatively recent emergence means their long-term operational patterns and potential for rebranding or law enforcement disruption remain to be observed. The group has been linked to 68 public disclosures across our corpus. First observed on a leak site on August 21, 2023; most recent post October 30, 2023. The operation is currently inactive.

Timeline of this disclosure

August 21, 2023A1 listed by Ransomedvcon the group's public leak site

Other recent disclosures by Ransomedvc

Ransomedvc has been linked to 68 public victims on Darkfield. A sample of the most recent:

See the full Ransomedvc dossier →

Sector and geography

This disclosure adds to ransomware activity in the Technology sector, which has 3,549 disclosures indexed across all operators we track. Geographically, A1 is reported in Austria, a country with 84 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Ransomedvc means A1 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 Ransomedvc'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.