BlackCat/ALPHV Responsible for Optum Outage: ARRL, PA AG Confirm Data Heists Across Critical Infrastructure

Post date: November 18, 2025 · Discovered: April 23, 2026 · 6 posts, 0 comments

The BlackCat/ALPHV ransomware gang claimed responsibility for the cyberattack on Optum, a UnitedHealth Group subsidiary, causing a massive outage affecting Change Healthcare. Beyond this, records show confirmed data theft incidents involving the American Radio Relay League (ARRL) and Pennsylvania's attorney general confirming the theft of personal and medical files following a cyberattack.

Commenters are reporting specific, confirmed breaches. 'BrikoX' details Henry Schein disclosed a data breach affecting over 160,000 people from at least two back-to-back BlackCat attacks in 2023. Furthermore, 'BrikoX' cites the Hunters International gang claiming a January attack on Tata Technologies stole 1.4TB of data. The consensus evidence points to multiple, confirmed breaches across healthcare, radio, and technology sectors.

The narrative is not based on speculation. Multiple authoritative sources, including the ARRL and state attorneys general, have confirmed actual data theft. The pattern shows repeated, confirmed ransomware incidents hitting diverse, critical infrastructure, with named gangs claiming credit for major outages.

Key Points

#1BlackCat/ALPHV linked to major healthcare disruption.

The gang claimed responsibility for the attack on Optum, causing the significant Change Healthcare outage.

#2PA State officials confirm medical file theft.

Pennsylvania's attorney general confirmed an August 2025 cyberattack stole personal and medical files.

#3ARRL suffered confirmed data theft.

The American Radio Relay League confirmed in May that some employee data was stolen via ransomware.

#4Henry Schein experienced multi-year breaches.

'BrikoX' documented Henry Schein disclosing a breach for over 160,000 people from at least two 2023 BlackCat attacks.

#5Hunters International claimed theft from Tata Technologies.

'BrikoX' reported that the gang claimed responsibility for stealing 1.4TB of data from Tata Technologies in January.

Source Discussions (6)

This report was synthesized from the following Lemmy discussions, ranked by community score.

54
points
Ransomware gang claims they stole 6TB of Change Healthcare data
[email protected]·1 comments·3/2/2024·by BrikoX·bleepingcomputer.com
16
points
ARRL finally confirms ransomware gang stole data in cyberattack
[email protected]·0 comments·7/13/2024·by BrikoX·bleepingcomputer.com
15
points
Henry Schein discloses data breach a year after ransomware attack
[email protected]·0 comments·10/24/2024·by BrikoX·bleepingcomputer.com
6
points
Pennsylvania AG confirms data breach after INC Ransom attack
[email protected]·0 comments·11/18/2025·by BrikoX·bleepingcomputer.com
5
points
Hunters International ransomware claims attack on Tata Technologies
[email protected]·0 comments·3/4/2025·by BrikoX·bleepingcomputer.com
4
points
ARRL finally confirms ransomware gang stole data in cyberattack
[email protected]·0 comments·7/12/2024·by lemmydev2·bleepingcomputer.com