Was Geoplin hit by ransomware?

Geoplin was listed by the sinobi ransomware operation (Slovenia), 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 Geoplin breach?

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

Ransomware victim disclosure

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Geoplin

Claimed by Sinobi · listed 5 months ago

Age

since listed · data leaked

Status timeline

ListedJan 20, 2026
Data leakeddate unknown

At a glance

Group: Sinobi
Status: Data leaked
Country: Slovenia
Sector: Energy
Listed on leak site: Jan 20, 2026

About the victim

AI dossier — public-source company profile

Geoplin is a leading natural gas supplier based in Slovenia, serving industrial, commercial, and residential customers with energy supply and optimization services. Founded in 1975, the company operates in Slovenia and extends into neighbouring countries. Geoplin positions itself as an advocate for natural gas as a transitional low-carbon energy source.

Industry: Natural Gas Supply & Distribution
Address: Cesta Ljubljanske brigade 11, 1000 Ljubljana, Slovenia
Employees: 201-500
Founded: 1975

Attack summary

Severity: high — Geoplin is a critical energy infrastructure operator (natural gas supply) in Slovenia; confirmed data publication by the threat actor indicates actual exfiltration affecting a nationally significant energy supplier, which elevates severity to high even without explicit data volume figures.

The sinobi ransomware group claims to have attacked Geoplin and has published data (disclosed_status: data_published), indicating exfiltration of company data, though no specific data volume or ransom demand has been stated in the post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Company operational data
Customer records (industrial, commercial, residential)
Energy optimization service data
Internal business documents

What the group claims

Geoplin is a leading supplier of natural gas in Slovenia, providing reliable and flexible energy solutions since 1975. The company caters to a diverse clientele, including industries, commercial sectors, and residential customers, by offering a range of services such as energy optimization and industrial lighting. Geoplin is also focused on environmental responsibility, promoting natural gas as a cleaner energy source to support the transition to a low-carbon society. With operations extending into neighboring countries, Geoplin is committed to adapting its offerings to meet the individual needs of its customers.

Sources

Victim sitewww.geoplin.com
Leak posthttp://sinobi6ftrg27d6g4sjdt65malds6cfptlnjyw52rskakqjda6uvb7yd.onion/leaks/696d497a6387a4c9a26eb4ed

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 20, 2026Geoplin 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

This disclosure adds to ransomware activity in the Energy sector, which has 375 disclosures indexed across all operators we track. Geographically, Geoplin is reported in Slovenia.

If your organisation is affected

A listing by sinobi means Geoplin 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.