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high severity August 22, 2023 · 3 min read Unverified claim — what this is

Atlantic Federal Credit Union Listed by alphv Ransomware Group

If you are a client of Atlantic Federal Credit Union, here’s what is being claimed, and what it would mean for you.

Atlantic Federal Credit Union serves Southern Maine in Biddeford, Brunswick, Cumberland, Freeport, Sanford, Saco, Topsham, and York. With Atlantic Kasasa Free Checking, along with great Auto Loan and Mortgage rates Atlantic believes that better rates can lead to a better future and a better life.

— 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.
Atlantic Federal Credit Union Listed by alphv Ransomware Group

Atlantic Federal Credit Union was listed on the Alphv ransomware group's leak site on August 22, 2023, claiming that internal files had been exfiltrated during a ransomware attack. The credit union, which serves communities across Southern Maine including Biddeford, Brunswick, Cumberland, Freeport, Sanford, Saco, Topsham, and York, has not publicly quantified the number of members affected or detailed the specific records involved.

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Reported Details from the Listing

The Alphv leak site entry states that internal files were taken in a ransomware incident. The disclosure does not specify the volume of data, the exact types of documents, or the number of individuals whose information appears in the stolen material. It simply confirms exfiltration occurred and that the group possesses the files. Public reporting on Alphv, also known as BlackCat, indicates the group typically posts samples or proof of data before escalating extortion pressure if demands are not met. The listing does not reveal any ransom amount or negotiation status.

Why This Matters for You and Your Family

If you or your family hold accounts at Atlantic Federal Credit Union, your personal and financial details may now sit in the hands of professional extortionists. Internal files from a credit union often contain names, addresses, Social Security numbers, account numbers, loan records, and transaction histories. Even without an exact count of affected records, the exposure creates immediate risk because financial institutions aggregate sensitive data that directly ties to your identity, credit, and daily banking. For families in Southern Maine who chose Atlantic for checking, auto loans, or mortgages, this claimed breach means the information you trusted the institution to protect is now a commodity on the dark web.

Doxxing and Identity-Chain Risks

Stolen internal files rarely stay isolated. Attackers and subsequent buyers combine them with other leaks to build complete profiles. A single email or phone number from the Atlantic files can link to your gaming accounts, social media handles, or children's online profiles, triggering cascading takeovers. Credential leaks of this nature frequently cascade into account takeovers and doxxing chains that expose home addresses, family relationships, and even children's gaming usernames. Once mapped, this information fuels identity theft, targeted phishing, or physical threats. The speed at which such data spreads across underground forums means the window for proactive defense is narrow.

Alphv Group's Known Track Record

Public reporting attributes the Alphv ransomware operation, also operating as BlackCat, to a group that emerged in late 2021 after the shutdown of the REvil gang. The actors have targeted healthcare providers, financial institutions, and municipalities across the United States and Europe. Their typical playbook involves initial access through compromised credentials or vulnerable remote desktop services, followed by extensive internal network reconnaissance, data exfiltration, and then deployment of custom ransomware. Rather than immediate encryption and public shaming, Alphv often relies on prolonged extortion, threatening to release sensitive files unless payment is made. The group has repeatedly demonstrated willingness to publish proof packages on their leak site when victims refuse to pay, as appears to be the case with Atlantic Federal Credit Union.

What to do

  • Run a DoxxScan to map every link between your emails, phone numbers, usernames, and real-world identity so you can see exactly what the Atlantic files connect to.
  • Rotate any password you used at Atlantic Federal Credit Union anywhere else it appears, and switch to 2FA through an authenticator app rather than SMS.
  • Enable continuous DoxxScan monitoring across 13.1B+ breach records and 100+ platforms so the next leak exposing your data is caught and acted on within hours.
  • Cover the entire household with DoxxScan family protection that extends to dependents and children's gaming accounts that often chain back to the same addresses and emails.
  • Let remediation specialists handle data-broker takedown requests and follow-up monitoring while you focus on securing your accounts.

The incident underscores that credit-union breaches now feed directly into sophisticated identity webs that threaten every member of your household. Starting a DoxxScan trial gives you continuous monitoring across 13.1B+ breach records and 100+ platforms, AI-powered identity-chain mapping, hands-on remediation by specialists, and full family coverage including children's gaming accounts. Protecting yourself and your family begins with seeing the full picture of what attackers already know.

What the free scan actually returns

Sample resultyou@email.comIllustrative — not a real person

Found on people-search siteswe remove these

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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 August 22, 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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