Was Schlemmer Holding GmbH hit by ransomware?

Schlemmer Holding GmbH was listed by the Payouts King ransomware operation (Germany), 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 Payouts King ransomware group?

Payouts King 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 Schlemmer Holding GmbH breach?

Payouts King published data attributed to Schlemmer Holding GmbH. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Schlemmer Holding GmbH

Claimed by Payouts King · listed 1 year ago

12m

Age

since listed · data leaked

Status timeline

ListedJul 14, 2025
Data leakeddate unknown

At a glance

Group: Payouts King
Status: Data leaked
Country: Germany
Sector: Manufacturing
Listed on leak site: Jul 14, 2025

About the victim

AI dossier — public-source company profile

Schlemmer Holding GmbH is a German technology company specializing in protective systems, including cable protection and production technologies. They serve automotive, energy, and telecommunications sectors globally.

Industry: Cable Protection & Production Technologies

Attack summary

Severity: low — Leak post contains only a generic company description with no proof files, screenshots, or details of data compromise or operational impact. Disclosed status is 'data_published' but no actual data inventory, proof count, or exfiltration evidence is documented.

The payoutsking group claims to have attacked Schlemmer Holding GmbH. No specific details are provided regarding whether data was exfiltrated, encrypted, or what data categories are at stake.

low

Original description

AI-summarised, not from the leak post

Schlemmer Holding GmbH, based in Germany, is a global technology company focusing on innovative solutions and products for a variety of sectors. Schlemmer specializes in the production of protective systems like cable protection and production technologies, offering its services to industries like the automotive, energy, and telecommunication sectors.

Sources

Victim siteschlemmer.com
Leak posthttps:/payoutsgn7cy6uliwevdqspncjpfxpmzgirwl2au65la7rfs5x3qnbqd.onion/detail_post/H2TjrDu9ReB9bk5veTXH

Source

Indexed 1 year 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 Payouts King

Payouts King Group. We are not RaaS. No affiliates are accepted. We use Tox messaging protocol. The group has been linked to 100 public disclosures across our corpus. First observed on a leak site on July 7, 2025; most recent post May 13, 2026. The operation is currently active.

Also tracked as: payoutsking.

Timeline of this disclosure

July 14, 2025Schlemmer Holding GmbH listed by Payouts Kingon the group's public leak site

Other recent disclosures by Payouts King

Payouts King has been linked to 100 public victims on Darkfield. A sample of the most recent:

See the full Payouts King dossier →

Sector and geography

This disclosure adds to ransomware activity in the Manufacturing sector, which has 3,681 disclosures indexed across all operators we track. Geographically, Schlemmer Holding GmbH is reported in Germany, a country with 926 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Payouts King means Schlemmer Holding GmbH 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-Bund (Germany), as required for your jurisdiction.
Monitor for the data appearing on Payouts King'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.