Was on-us hit by ransomware?

on-us was listed by the gunra ransomware operation (Hong Kong SAR China), 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 gunra ransomware group?

gunra 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 on-us breach?

gunra published data attributed to on-us. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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on-us

Claimed by Gunra · listed 3 days ago

Age

since listed · data leaked

Status timeline

ListedJun 30, 2026
Data leakeddate unknown

At a glance

Group: Gunra
Status: Data leaked
Country: Hong Kong SAR China
Listed on leak site: Jun 30, 2026

About the victim

AI dossier — public-source company profile

On-us is a Hong Kong-based FinTech company specializing in smart e-voucher and digital rewards platforms. They serve as a multi-merchant incentive ecosystem, enabling marketers and financial institutions across APAC to deliver personalized loyalty campaigns with real-time engagement tracking and data-driven insights.

Industry: FinTech & Digital Loyalty Platforms

Attack summary

Severity: low — No substantive leak post content provided (marked AI-generated placeholder); no proof files, screenshots, or data samples advertised; no operational impact stated; insufficient evidence of actual data exfiltration.

The gunra group claims to have published data from On-us. However, the leak post content is marked as 'AI generated N/A', providing no substantive details about the attack method, data exfiltrated, or proof of compromise.

low

Original description

AI-summarised, not from the leak post

N/A

Sources

Victim siteon-us.com

Source

Indexed 3 days 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 gunra

Gunra is an emerging ransomware group that was first observed in April 2025, operating with primarily financial motivations based on their targeting patterns across multiple high-value sectors. The group's origin and affiliations remain unclear due to limited public documentation from major security vendors, though their geographic targeting suggests possible international operations given their focus on victims across Brazil, South Korea, Japan, Canada, and Egypt. With approximately 20 known victims to date, Gunra appears to follow conventional ransomware attack methodologies typical of financially-motivated cybercriminal groups, though specific technical details regarding their initial access vectors, encryption methods, or use of double extortion tactics have not been publicly documented by major threat intelligence sources. The group demonstrates opportunistic targeting behavior, focusing primarily on manufacturing organizations while also compromising entities in healthcare, technology, and financial services sectors, suggesting they may operate opportunistically rather than with highly specialized sector expertise. Given the recent emergence of this group in April 2025 and limited public reporting from established threat intelligence organizations such as CISA, FBI, or major security vendors, Gunra's current operational status, technical capabilities, and long-term threat trajectory require continued monitoring as more intelligence becomes available. The group has been linked to 45 public disclosures across our corpus. First observed on a leak site on April 23, 2025; most recent post June 30, 2026. The operation is currently active.

Timeline of this disclosure

June 30, 2026on-us listed by gunraon the group's public leak site

Other recent disclosures by gunra

gunra has been linked to 45 public victims on Darkfield. A sample of the most recent:

See the full gunra dossier →

Sector and geography

Geographically, on-us is reported in Hong Kong SAR China, a country with 61 ransomware disclosures in our corpus.

If your organisation is affected

A listing by gunra means on-us 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 gunra'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.