Was Sika Footwear hit by ransomware?

Sika Footwear was listed by the worldleaks ransomware operation (Denmark), 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 worldleaks ransomware group?

worldleaks 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 Sika Footwear breach?

worldleaks published data attributed to Sika Footwear. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Sika Footwear

Claimed by Worldleaks · listed 11 months ago

10m

Age

since listed · data leaked

Status timeline

ListedAug 26, 2025
Data leakeddate unknown

At a glance

Group: Worldleaks
Status: Data leaked
Country: Denmark
Sector: Consumer Services
Listed on leak site: Aug 26, 2025

About the victim

AI dossier — public-source company profile

Sika Footwear is a Danish company that manufactures and sells professional work footwear, including shoes, clogs, boots, and sandals designed for sectors such as healthcare, hospitality, construction, food industry, and heavy industry. The company operates a multi-brand e-commerce platform offering products certified to EN ISO 20345 and EN ISO 20347 safety standards. It distributes brands including SIKA, BRYNJE, ELTEN, COFRA, DUNLOP, and others across multiple European markets.

Industry: Work & Safety Footwear Manufacturing & Retail

Attack summary

Severity: medium — Data has been published, indicating confirmed exfiltration, but no details on data type, scale, or sensitivity (e.g. PII, financial records) are provided in the post, limiting severity to medium.

The worldleaks group claims to have compromised Sika Footwear and has published data (disclosed status: data_published), though the leak post provides no specific details on encryption or volume of exfiltrated files.

medium

Data the group says was taken

AI dossier — extracted from the leak post

Unspecified company data

Original description

AI-summarised, not from the leak post

Sika Footwear is a Danish company specializing in manufacturing and selling work footwear specifically designed for the needs and comfort of professionals in various sectors such as healthcare, hospitality, and construction. It prioritizes user comfort, durability of products, foot safety, as well as stylish design. The company produces shoes, clogs, and boots suitable for different work environments.

Sources

Victim sitewww.sikafootwear.dk
Leak posthttps://worldleaksartrjm3c6vasllvgacbi5u3mgzkluehrzhk2jz4taufuid.onion/companies/3722231435

Source

Indexed 11 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 worldleaks

Based on the limited available data, worldleaks is a recently emerged ransomware group that was first observed in May 2025 and appears to be primarily financially motivated, having claimed 134 victims in a relatively short timeframe since its emergence. The group's origin and organizational structure remain unclear, with no publicly documented information from major cybersecurity firms or law enforcement agencies regarding their country of origin, potential affiliations, or operational model. Their targeting patterns indicate a focus on English-speaking countries, particularly the United States, United Kingdom, and Canada, with additional activity observed in Germany and Japan, while their sector targeting shows a preference for healthcare, technology, manufacturing, and consumer services organizations. Due to the group's recent emergence and limited public documentation by established threat intelligence sources, specific details about their attack methodologies, encryption techniques, extortion tactics, and notable campaigns have not yet been comprehensively analyzed or reported by organizations such as CISA, FBI, or major cybersecurity research firms. The group appears to remain active as of the most recent observations, though comprehensive threat intelligence profiling awaits further analysis and documentation by established cybersecurity authorities. The group has been linked to 173 public disclosures across our corpus. First observed on a leak site on May 18, 2025; most recent post July 2, 2026. The operation is currently active.

Timeline of this disclosure

August 26, 2025Sika Footwear listed by worldleakson the group's public leak site

Other recent disclosures by worldleaks

worldleaks has been linked to 173 public victims on Darkfield. A sample of the most recent:

See the full worldleaks dossier →

Sector and geography

This disclosure adds to ransomware activity in the Consumer Services sector, which has 829 disclosures indexed across all operators we track. Geographically, Sika Footwear is reported in Denmark, a country with 13 ransomware disclosures in our corpus.

If your organisation is affected

A listing by worldleaks means Sika Footwear 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.
Report the incident to your national CERT, CFCS (Denmark), as required for your jurisdiction.
Monitor for the data appearing on worldleaks'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.