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high severity May 05, 2023 · 3 min read Unverified claim — what this is

Coteccons Group was hacked One of the most insecure construction companies in Asia has lea Listed by alphv Ransomware Group

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

Coteccons Group was listed on Alphv's leak site. Alphv claims to have stolen internal data. This is the group's claim, not a confirmed finding.

Coteccons Group was hacked One of the most insecure construction companies in Asia has lea Listed by alphv Ransomware Group

Coteccons Group, a major Vietnamese construction firm, appeared on the Alphv ransomware leak site on May 05, 2023. The listing states that the company suffered a ransomware attack in which internal files were exfiltrated. The number of records affected remains unknown, and the precise data types taken have not been detailed beyond the generic description of internal files.

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Primary Disclosure Details

The Alphv leak-site entry states that Coteccons was listed after refusing or failing to meet the group's demands. It provides the company's headquarters address at 236-6 Dien Bien Phu Ward 17 St, Ho Chi Minh City, along with contact phone number, website, LinkedIn, Facebook, Twitter, and stock symbol CTD. The disclosure indicates that internal files were exfiltrated during the ransomware attack but does not quantify the volume of data or specify exact document categories. Public mirrors of the leak site, such as ransomware.live, preserve this original posting.

Why This Matters for You and Your Family

When a construction company like Coteccons is breached, the exposed internal files can easily contain contracts, employee records, vendor details, or customer information that include personal data. If your employer, your contractor, or any business you dealt with in Vietnam worked with Coteccons, your details may now sit in an attacker-controlled archive. Internal files exfiltrated in these incidents frequently hold names, addresses, national ID numbers, banking coordinates, or project-related correspondence that identity thieves prize. Even without an exact record count, the risk is concrete: once data leaves the victim's network it circulates on dark-web forums and can surface months or years later in fraud schemes targeting you or your family.

Doxxing and Identity-Chain Risks

Ransomware groups rarely stop at publishing a single compressed archive. They often slice the stolen material into smaller dumps and sell or trade portions on multiple platforms. A leaked employee spreadsheet can be cross-referenced with your LinkedIn profile, social-media accounts, or gaming usernames, rapidly building a complete identity chain. This chaining turns one corporate breach into persistent harassment, SIM-swapping attempts, or targeted phishing against your household. Credential leaks of this kind also cascade into account takeovers on personal services and children's gaming accounts that share the same email address or password patterns.

Alphv Group's Known Track Record

Public reporting attributes the Alphv operation, also known as BlackCat, to a ransomware-as-a-service collective that emerged in late 2021. The group has claimed responsibility for attacks on hundreds of organizations worldwide, including large corporations in healthcare, manufacturing, and technology sectors. Their typical playbook begins with initial access gained through compromised credentials or exploited remote-desktop services, followed by rapid lateral movement, data exfiltration, and deployment of custom ransomware. After encryption they wait a short period before publishing samples on their leak site if the victim does not pay. Extortion tactics combine threats of data publication with distributed-denial-of-service attacks, applying pressure across multiple communication channels. The exact success rate and average ransom collected by Alphv remain uncertain, but public trackers show the group maintains an active presence on both clear-web and onion leak portals.

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 across 13.1B+ breach records and 100+ platforms so the next exposure surfaces in hours rather than months.
  • Rotate any password you used at Coteccons or associated vendors anywhere it has been reused, and switch to 2FA through an authenticator app instead of SMS.
  • Cover the entire household with DoxxScan family protection that extends to dependents and children's gaming accounts often chained to the same personal details.
  • Let remediation specialists manage takedown requests for any exposed personal documents or broker listings that appear after the incident.

The Coteccons breach illustrates how quickly corporate ransomware spills into personal lives when internal files containing identifiable information are taken. Acting promptly limits how far attackers can build on the stolen material. DoxxScan by GalaxyWarden delivers continuous monitoring across 13.1B+ breach records and 100+ platforms, AI-powered identity-chain mapping, hands-on remediation by specialists, and full household coverage that includes children's gaming accounts. Start your DoxxScan trial today to close the gaps this and future incidents create.

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 May 05, 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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