Disclosure context

About Blackbyte

BlackByte is a ransomware-as-a-service (RaaS) operation that emerged in October 2021, primarily motivated by financial gain through double extortion tactics targeting organizations across multiple sectors. The group is suspected to operate from Russia or former Soviet states based on their use of Russian-language forums and avoidance of targeting organizations in Commonwealth of Independent States countries, though they maintain no confirmed links to other established ransomware families. BlackByte operators typically gain initial access through vulnerable Microsoft Exchange servers, phishing campaigns, and exploitation of remote desktop protocol (RDP) services, employing tools such as Cobalt Strike for lateral movement and data exfiltration before deploying their custom ransomware payload that uses AES-256 encryption with RSA-2048 key protection. The group has demonstrated particular focus on critical infrastructure sectors, with the FBI and CISA issuing joint advisories in February 2022 highlighting attacks against organizations in government, healthcare, manufacturing, and education sectors, including notable incidents affecting San Francisco's transportation authority and multiple healthcare systems across the United States. BlackByte remains active as of 2024, continuing to evolve their tactics and maintain their leak site for publishing stolen data from victims who refuse to pay ransoms. The group has been linked to 147 public disclosures across our corpus. First observed on a leak site on October 4, 2021; most recent post July 30, 2025. The operation is currently inactive.

Timeline of this disclosure

June 16, 2023Kisco Senior Living listed by Blackbyteon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Healthcare sector, which has 1,779 disclosures indexed across all operators we track. Geographically, Kisco Senior Living is reported in United States, a country with 7,392 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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Kisco Senior Living

Claimed by Blackbyte · listed 3 years ago

35m

Age

since listed · data leaked

Status timeline

Listed
Jun 16, 2023
Data leaked

At a glance

Group: Blackbyte
Status: Data leaked
Country: United States
Sector: Healthcare
Listed on leak site: Jun 16, 2023

About the victim

AI dossier — public-source company profile

Kisco Senior Living is a United States-based operator of senior living communities, providing assisted living and independent living services to elderly residents. Founded in 1990, the company manages multiple residential communities across the country. It serves a vulnerable population requiring ongoing healthcare and personal support services.

Industry: Senior Living & Elderly Care Services
Employees: 501-1000
Founded: 1990

Attack summary

Severity: critical — Kisco Senior Living operates in the healthcare and senior care sector, handling PII and likely medical/care data for elderly residents — a vulnerable population. The 'data_published' status confirms exfiltration and public release of regulated sensitive data, meeting the critical threshold.

BlackByte claims to have attacked Kisco Senior Living and has published data as part of a disclosed leak, indicating exfiltration of company data. The specific data types have not been fully enumerated in the post, but the disclosure status is 'data_published', suggesting sensitive information has been released.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Resident personal information
Employee records
Healthcare/care plan data
Financial records
Internal business documents

What the group claims

Kisco Senior Living was founded in 1990. This company provides elderly care services in the form of assisted and independent community living.

Sources

Victim sitekiscoseniorliving.com

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.