Was SKK Networks Sp. z o.o. and UNICARD Systems Sp. z o. o. and SKK SA hit by ransomware?

SKK Networks Sp. z o.o. and UNICARD Systems Sp. z o. o. and SKK SA was listed by the Deadlock ransomware operation (Poland), 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 Deadlock ransomware group?

Deadlock 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 SKK Networks Sp. z o.o. and UNICARD Systems Sp. z o. o. and SKK SA breach?

Deadlock published data attributed to SKK Networks Sp. z o.o. and UNICARD Systems Sp. z o. o. and SKK SA. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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SKK Networks Sp. z o.o.

listed as SKK Networks Sp. z o.o. and UNICARD Systems Sp. z o. o. and SKK SA · Claimed by Deadlock · listed 5 days ago

Age

since listed · data leaked

Status timeline

ListedJul 10, 2026
Data leakeddate unknown

At a glance

Group: Deadlock
Status: Data leaked
Country: Poland
Sector: Business Services
Listed on leak site: Jul 10, 2026

About the victim

AI dossier — public-source company profile

SKK Networks is a specialized IT infrastructure provider based in Kraków, Poland, with 17 years of experience. The company designs, builds, and maintains professional LAN and WLAN networks for industrial and commercial environments, including warehouses, cold storage facilities, and manufacturing plants. They offer comprehensive services from network audits and NIS2 compliance to design, construction, and ongoing maintenance.

Industry: IT Infrastructure & Network Solutions
Address: Kraków, Poland

Attack summary

Severity: medium — Victim is a professional services company with access to sensitive network infrastructure and client data. However, no explicit proof of data exfiltration is presented in the leak post, and no operational impact is claimed. The disclosure appears to be an announcement rather than a proof-of-concept dump.

Deadlock claims to have compromised SKK Networks and two related entities (UNICARD Systems and SKK Labels). The post does not explicitly state whether data was exfiltrated, encrypted, or both, nor does it specify the nature or volume of data at risk.

medium

What the group claims

SKK Networks is a specialized IT infrastructure provider based in Kraków, Poland, that designs, builds, and maintains professional LAN and WLAN networks. They focus on creating high-performance connectivity solutions for challenging environments like high-bay warehouses, cold storage facilities, and industrial plants. Unicard Systems is a Polish manufacturer and integrator of security and building automation systems with over 30 years of experience. Based in Kraków, the company specializes in designing and implementing proprietary hardware and software solutions for business and public infrastructure. SKK Labels , a prominent Polish label manufacturer and printing company based in Kraków. With over 30 years of experience, the company provides comprehensive product marking solutions across various industries, including pharmaceutical, automotive, and logistics.

Sources

Victim sitewww.skk-networks.com/en

Source

Indexed 5 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 Deadlock

Deadlock is a ransomware group first observed in June 2026 with an apparent financial motivation, having claimed responsibility for attacks against at least 10 known victims across a geographically diverse target set. Given the recency of their emergence and limited public documentation by major threat intelligence organizations such as CISA, FBI, or Mandiant at this time, a comprehensive technical profile cannot be fully established. Based on available victimology data, the group has demonstrated a targeting pattern spanning Singapore, China, Sweden, Spain, and Nigeria, suggesting an opportunistic or globally distributed operational scope rather than a regionally focused campaign. Targeted sectors include manufacturing, business services, telecommunications, and financial services, indicating a preference for industries with high operational dependencies and potential for significant disruption, which is consistent with financially motivated ransomware actors seeking maximum leverage for ransom payment. No confirmed attribution regarding country of origin, RaaS affiliation, or specific tooling has been publicly documented by authoritative sources as of this profile's preparation. Due to the group's nascent operational timeline and the limited volume of publicly verified intelligence, analysts should treat this profile as preliminary and subject to significant revision as additional technical indicators, victim disclosures, and research reporting become available. Continued monitoring is advised given the cross-sector and cross-regional targeting behavior observed in this early operational phase. The group has been linked to 76 public disclosures across our corpus. First observed on a leak site on June 15, 2026; most recent post July 12, 2026. The operation is currently active.

Timeline of this disclosure

July 10, 2026SKK Networks Sp. z o.o. and UNICARD Systems Sp. z o. o. and SKK SA listed by Deadlockon the group's public leak site

Other recent disclosures by Deadlock

Deadlock has been linked to 76 public victims on Darkfield. A sample of the most recent:

See the full Deadlock dossier →

Sector and geography

This disclosure adds to ransomware activity in the Business Services sector, which has 3,796 disclosures indexed across all operators we track. Geographically, SKK Networks Sp. z o.o. and UNICARD Systems Sp. z o. o. and SKK SA is reported in Poland, a country with 21 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Deadlock means SKK Networks Sp. z o.o. and UNICARD Systems Sp. z o. o. and SKK SA 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, CERT Polska (Poland), as required for your jurisdiction.
Monitor for the data appearing on Deadlock'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.