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high severity June 19, 2023 · 3 min read Unverified claim — what this is

Mammoth Energy (NASDAQ: TUSK) Listed by alphv Ransomware Group

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

Energy At Mammoth Energy Services, our employees are our most valuable asset, and we are committed to providing an environment that promotes safety, health and wellbeing.

— from Alphv’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.
Mammoth Energy (NASDAQ: TUSK) Listed by alphv Ransomware Group

Mammoth Energy Services (NASDAQ: TUSK) appeared on the Alphv ransomware group’s leak site on June 19, 2023, claiming that the oilfield services company suffered a ransomware attack in which internal files were exfiltrated. The listing does not specify how many employees or customers were affected, nor does it detail the exact volume or sensitivity of the stolen data.

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Reported Details from the Listing

The Alphv leak site entry states that internal files were exfiltrated during a ransomware incident. No sample data is publicly shown, and the disclosure does not quantify the number of records involved. Mammoth Energy has not released a detailed public breach notification that adds further specifics on data types or affected individuals. The incident therefore stands as a claimed ransomware exfiltration with limited public visibility into its full scope.

Alphv gave the company a deadline to engage before additional material would be published, a standard part of their extortion process. The exact deadline and any subsequent actions remain unclear from the primary listing.

Why This Matters for You and Your Family

When an energy-services provider like Mammoth Energy loses control of internal files, the information often includes employee records, contractor details, tax forms, direct-deposit information, and correspondence that can be used to impersonate or target individuals. Even if you never worked directly for the company, your data may have been shared through vendors, benefits administrators, or joint ventures common in the oilfield sector.

Any exposed personal information raises the risk of identity theft, fraudulent tax filings, and spear-phishing campaigns aimed at your household. Children’s records, if included in employee benefit files, can be especially damaging because they often remain untouched for years until credit checks or college applications reveal the compromise.

Doxxing and Identity-Chain Implications

Ransomware leaks rarely stop at one company. Stolen internal files frequently contain email addresses, usernames, and passwords that attackers test across other services. A single credential pair allegedly taken from Mammoth Energy can unlock personal email, banking portals, or gaming accounts that link back to your real identity and home address.

These credential leaks cascade into doxxing chains: attackers combine workplace data with social-media handles, then map family relationships and children’s online profiles. Once the household is connected, extortion or identity fraud becomes far easier. DoxxScan by GalaxyWarden continuously monitors 13.1B+ breach records and 100+ platforms with AI-powered identity-chain mapping and hands-on remediation by specialists, including coverage for family and children’s gaming accounts that often serve as weak links in these chains.

Alphv’s Known Track Record

Public reporting attributes the emergence of Alphv (also known as BlackCat) to late 2021. The group has since targeted organizations across healthcare, manufacturing, education, and energy sectors. Notable prior victims include large U.S. healthcare providers and industrial firms whose internal documents were gradually released when ransom demands went unmet.

Alphv’s typical playbook begins with initial access gained through phishing, compromised remote desktop credentials, or vulnerable public-facing applications. Once inside, operators exfiltrate sensitive files before deploying ransomware. They then pressure victims through a dual-extortion model: threatening both data encryption and public leak of stolen documents. The group maintains a professional leak site and frequently updates it with countdown timers and sample files to increase pressure.

What to do

  • Run a DoxxScan to map every link between your handles, emails, phone numbers, and real identity, with cleanup handled by the service.
  • Enable continuous DoxxScan monitoring so the next breach exposing your information is caught in hours rather than months.
  • Rotate any password you used at Mammoth Energy or its vendors anywhere it has been reused, and switch to 2FA through an authenticator app instead of SMS.
  • Cover the entire household — DoxxScan family coverage extends to dependents and children’s gaming accounts that often chain back to the same breached credentials.
  • Let remediation specialists manage takedown requests for any exposed personal documents appearing on data-broker or extortion sites.

The Mammoth Energy listing is a reminder that ransomware groups continue to target mid-sized public companies whose employee and contractor data directly affects thousands of ordinary families. Acting quickly on credential hygiene and identity mapping limits how far attackers can travel down the chain. Start your DoxxScan trial today to gain both immediate visibility into your exposure and ongoing protection that includes hands-on help when new leaks surface.

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.

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Report details & sourcing

Severity High
Disclosed June 19, 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.
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