Was OnSight hit by ransomware?

OnSight was listed by the sinobi ransomware operation (United States), 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 OnSight breach?

sinobi published data attributed to OnSight. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Onsight Training and Consulting

listed as OnSight · Claimed by Sinobi · listed 5 months ago

Age

since listed · data leaked

Status timeline

ListedJan 22, 2026
Data leakeddate unknown

At a glance

Group: Sinobi
Status: Data leaked
Country: United States
Listed on leak site: Jan 22, 2026

About the victim

AI dossier — public-source company profile

Onsight Training and Consulting (onsight.com) is a US-based provider of on-site and online technical training and consulting services, offering courses in Python, Perl, Linux, JavaScript, and related technologies. The company serves clients including Fermilab, Motorola, Intel, Eli Lilly, and Abbott. It also provides consulting in programming, web development, system administration, database administration, and Linux security.

Industry: IT Training & Technical Consulting

Attack summary

Severity: medium — Data is listed as published, indicating confirmed exfiltration, but no specific data types, volume, or sensitive regulated data categories are described in the leak post. The apparent mismatch between the leak post description and the actual company at onsight.com further reduces clarity on true impact.

The sinobi ransomware group claims to have exfiltrated data from what it describes as a production facilities company in the film and broadcast industry; however, the leak post description does not match the actual onsight.com business (an IT training firm), suggesting possible victim misidentification. The disclosure status is listed as data_published, implying data has been released.

medium

Data the group says was taken

AI dossier — extracted from the leak post

Unspecified exfiltrated company data

What the group claims

ONSIGHT is a leading production facilities company, specializing in services to the film and broadcast industries. The suite of services range from equipment rental through to post production and DI finishing. Conveniently based at Shepperton Studios, the camera department supplies high-end digital cameras and 2D or 3D production equipment. The award-winning post production team is located in Soho, London and offers editing systems with 24/7 technical support, a digital lab, and a full 2D or stereoscopic 3D post service. Renowned for innovative technology and groundbreaking 3D, ONSIGHT works closely with key manufacturers and is an official service provider to the premier 3D broadcaster, BSkyB. Recent 3D credits include the BAFTA-winning Flying Monsters 3D With David Attenborough (Atlantic/Sky 3D), Madam Butterfly 3D (a co-productionfrom RealD and the Royal Opera House, produced by Principal Large Format), Flight of the Butterflies in 3D (SK Films), Kingdom of Plants 3D WithDavid Atten

Sources

Victim siteonsight.com
Leak posthttp://sinobi6ftrg27d6g4sjdt65malds6cfptlnjyw52rskakqjda6uvb7yd.onion/leaks/6971248e6387a4c9a2929a67

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 22, 2026OnSight listed by sinobion the group's public leak site

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

Geographically, OnSight is reported in United States, a country with 7,392 ransomware disclosures in our corpus.

If your organisation is affected

A listing by sinobi means OnSight 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.