Was Asian Heart Institute hit by ransomware?

Asian Heart Institute was listed by the sinobi ransomware operation (India), 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 sinobi ransomware group?

sinobi 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 Asian Heart Institute breach?

sinobi published data attributed to Asian Heart Institute, around 425.000 patients records. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Asian Heart Institute

Claimed by Sinobi · listed 5 months ago

425.000 patients

Records

Age

since listed · data leaked

Status timeline

ListedJan 21, 2026
Data leakeddate unknown

At a glance

Group: Sinobi
Status: Data leaked
Country: India
Sector: Healthcare
Listed on leak site: Jan 21, 2026
Records: 425.000 patients

About the victim

AI dossier — public-source company profile

Asian Heart Institute (AHI) is a leading cardiac care hospital located in Mumbai, India, specializing in cardiology, cardiac surgery, and pediatric cardiac care across 25+ medical specialties. Founded in 2002, the institute has treated over 425,000 patients and reports a 99.83% success rate in cardiac surgeries. It serves both domestic and international patients using advanced technology and minimally invasive procedures.

Industry: Cardiac Care & Heart Surgery (Hospital)
Address: Mumbai, India
Founded: 2002

Attack summary

Severity: critical — Asian Heart Institute is a large-scale healthcare provider that has treated over 425,000 patients; a confirmed data publication from a hospital of this scale almost certainly involves regulated, sensitive medical PII and health records at scale, meeting the threshold for critical severity.

The ransomware group sinobi claims to have compromised Asian Heart Institute and has published data (disclosed status: data_published), though the leak post does not specify the volume of data exfiltrated or whether encryption was also performed.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Patient records
Medical/clinical data
Personal health information (PII)
International patient records
Appointment and admission records

What the group claims

Asian Heart Institute (AHI) is a leading cardiac care hospital located in Mumbai, India, specializing in comprehensive heart treatment. The institute offers a wide range of services including cardiology, cardiac surgery, and pediatric cardiac care, with a strong emphasis on personalized and expert care. AHI has treated over 425,000 patients, showcasing its reputation for excellence with a 99.83% success rate in cardiac surgeries. Designed to cater to both local and international patients, AHI is committed to ensuring high-quality healthcare by utilizing advanced technology and minimally invasive procedures.

Sources

Source

Indexed 5 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 sinobi

Based on the limited publicly available information, Sinobi appears to be a recently emerged ransomware operation first observed in July 2025, with financial motivations evidenced by their targeting of 268 victims across multiple sectors. The group's origin and specific affiliations remain undocumented in public threat intelligence reporting, and there is no confirmed information regarding whether they operate as a Ransomware-as-a-Service model or as an independent entity. Their attack methodology and technical capabilities have not been extensively documented by major security research organizations, though their targeting patterns suggest a broad opportunistic approach rather than highly selective operations. The group demonstrates a preference for targeting organizations in the United States, India, United Kingdom, Canada, and Italy, with a focus on manufacturing, healthcare, construction, and technology sectors, suggesting they may exploit common vulnerabilities across these industries rather than deploying sophisticated, sector-specific attack vectors. No major high-profile campaigns or significant law enforcement actions against Sinobi have been publicly reported by CISA, FBI, or established threat intelligence firms. Given the recent emergence timeline and lack of extensive public documentation, the group's current operational status and long-term trajectory remain unclear, though the substantial victim count suggests continued activity as of the last available reporting period. The group has been linked to 274 public disclosures across our corpus. First observed on a leak site on July 5, 2025; most recent post May 8, 2026. The operation is currently active.

Timeline of this disclosure

January 21, 2026Asian Heart Institute listed by sinobion the group's public leak site

Records: 425.000 patients

Other recent disclosures by sinobi

sinobi has been linked to 274 public victims on Darkfield. A sample of the most recent:

See the full sinobi dossier →

Sector and geography

This disclosure adds to ransomware activity in the Healthcare sector, which has 1,780 disclosures indexed across all operators we track. Geographically, Asian Heart Institute is reported in India, a country with 255 ransomware disclosures in our corpus.

If your organisation is affected

A listing by sinobi means Asian Heart Institute 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 sinobi'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.