Skip to content
Back to Blog
high severity November 02, 2023 · 3 min read Unverified claim — what this is

Koh Brothers Listed by lorenz Ransomware Group

If you are a customer of Koh Brothers, here’s what is being claimed, and what it would mean for you.

Koh Brothers was listed on the lorenz ransomware leak site. The group claims to have stolen internal data.

— from Lorenz’s own leak-site posting. This is the group’s claim, quoted verbatim; it is not GalaxyWarden’s reporting and has not been independently verified.
Koh Brothers Listed by lorenz Ransomware Group

On November 2, 2023, construction and engineering firm Koh Brothers appeared on the leak site operated by the lorenz ransomware group. The listing states that the company suffered a ransomware attack in which internal files were exfiltrated. The disclosure does not specify the number of records affected, the exact data types stolen, or any ransom demand.

Already exposed?
You can’t unleak data. You can take away what it’s worth.
A leaked record is where it starts, not where it ends. What turns it into your front door is the look-up sites publishing your address beside your name — and those are what an AI reads when somebody asks about you. The free scan shows you both. We write to 582 companies.
See what is exposed about you — free scan →
Not ready yet? Run a free breach check on this email
We’ll check it against 13.1B+ leaked records right now — no account needed. Continuous monitoring & alerts are part of Protection.

Reported Details from the Listing

The lorenz leak site entry claims the attackers successfully stole internal company data during a ransomware operation. As is typical with these listings, the group has published a sample of allegedly stolen files to pressure the victim. The primary disclosure gives no further technical details about the initial access vector, the precise date of the intrusion, or the volume of data taken. It simply states that Koh Brothers data is now hosted on the extortion platform.

Why This Matters for You and Your Family

When a company like Koh Brothers is hit, the information exposed often includes documents that contain names, addresses, contact details, financial records, or employee information belonging to ordinary people. If your employer, your contractor, your insurer, or any vendor you deal with uses Koh Brothers, your personal data may now sit in an attacker-controlled archive. That exposure creates long-term risk because stolen internal files rarely stay private once they reach ransomware leak sites.

The Doxxing and Identity-Chain Risk

Internal files frequently contain spreadsheets that link employee names to home addresses, phone numbers, dates of birth, or even family member details. Attackers and subsequent buyers can combine this information with other breaches to build complete identity profiles. These chains often extend to email addresses and passwords that get reused at retail sites, government portals, and online services. The same credentials can also unlock gaming accounts belonging to you or your children, turning one corporate breach into a cascade of account takeovers and further doxxing. DoxxScan by GalaxyWarden continuously monitors 13.1 billion+ breach records across more than 100 platforms and uses AI-powered identity-chain mapping to reveal exactly how one leak connects to others.

Lorenz Ransomware Group Track Record

Public reporting attributes the emergence of lorenz to late 2020. The group has targeted organizations across multiple sectors, including manufacturing, healthcare, and professional services. Their typical playbook involves gaining initial access through phishing or exploited remote desktop services, deploying ransomware to encrypt systems, exfiltrating sensitive files before encryption, and then publishing samples on their leak site when the victim does not pay. The group’s extortion style relies on public shaming and the threat of full data release rather than solely on encryption.

What to do

  • Run a DoxxScan to map every link between your handles, emails, phone numbers, and real identity, with cleanup handled by Warden specialists.
  • Enable continuous DoxxScan monitoring so the next breach that touches your data is caught in hours rather than months.
  • Rotate any password you used at Koh Brothers or any related vendor account, and switch on 2FA using an authenticator app instead of SMS.
  • Cover the entire household with DoxxScan family protection that extends to dependents and children’s gaming accounts that often chain back to the same address or email domain.
  • Let remediation specialists manage takedown requests for any exposed personal documents found circulating on data broker or extortion sites.

The incident shows that corporate ransomware leaks continue to expose ordinary families to identity theft and doxxing long after the initial attack. Staying ahead requires more than reactive checks. Start your DoxxScan trial and let continuous monitoring plus hands-on specialists do the heavy lifting across both corporate leaks and the gaming accounts that increasingly sit at the center of identity chains.

What the free scan actually returns

Sample resultyou@email.comIllustrative — not a real person

Found on people-search siteswe remove these

These listings are live, public, and legal to remove — and removing them is what we do.

value redacted in this sampleage, relatives, address historySpokeo
value redacted in this samplephone, household, property recordsBeenVerified
value redacted in this sample582 companies checked

Found in breach recordsverifiedreported — unverified

Each record is labeled: confirmed breach data, or an attacker’s claim no one has verified.

verifiedvalue redacted in this samplepassword + phone · 2024telecom breach
unverifiedvalue redacted in this sampleclaimed in ransomware listing · 2026leak-site claim

Leaked data cannot be deleted from the internet — anyone claiming otherwise is lying. Broker listings can be removed. We do the second, and show you exactly what to fix from the first.

Check your exposure
Koh Brothers is one listing. Your email is probably in others.
We can’t confirm any single incident against the sources we search, so we won’t pretend to. What we can show you is your own exposure — your email against 13.1B+ leaked records and the sites that publish your address. About 15 seconds. No account, no card.

By running your scan you agree to the Terms and Conditions and the Privacy Policy, and to GalaxyWarden emailing you the results of this scan.

Report details & sourcing

Severity High
Disclosed November 02, 2023
Last reviewed August 8, 2026
Affected Unconfirmed
Unverified claim — what this report is
This page documents a public listing on a ransomware/extortion group’s leak site, tracked via public threat-intelligence sources. A listing is the attacker’s claim. GalaxyWarden aggregates and reports such claims; we have not independently verified that a breach occurred, what data (if any) was taken, or the accuracy of anything the group asserts, and the named organisation has not necessarily confirmed the incident. Sections above describe what the listing shows and the group’s documented history — not verified findings about the named organisation. If you represent this organisation and believe anything here is inaccurate, tell us and we’ll review it promptly.
Editorial & sourcing policy
GalaxyWarden is a breach-monitoring service and news aggregator. We do not exfiltrate, host, purchase, or redistribute stolen data. Breach information is compiled from publicly accessible sources and threat-intelligence platforms, and is reported as claims attributed to their source. We promptly correct or remove material shown to be inaccurate — see our content & takedown policy or write to support@galaxywarden.com.
Share this Post on X Reddit Email