Coinmama 2017 Data Breach

Coinmama Cryptocurrency Brokerage Breach (2017, Discovered 2019): 479K Customer Accounts Including Passwords Exposed

Platform · Cryptocurrency buying and selling · Digital asset brokerage · Global

Coinmama Cryptocurrency Brokerage Breach (2017, Discovered 2019): 479K Customer Accounts Including Passwords Exposed

Cryptocurrency brokerage platform.

Confirmed · ObscureIQ Intelligence
Breach Risk Index i
24/100
Lower riskHigher risk
Lower: limited current risk based on data value and recency.
Data Sensitivity i
Standard
Exposed data is largely lower-sensitivity. Standard identity-protection precautions are advised.
479KRecords
2017Year

The Breach Risk Index (BRI) is a proprietary 0–100 score rating how dangerous a breach is right now, based on how recently the data has been circulating on the dark web and how valuable it is to attackers.

Classification Tags
Cryptocurrency2017

Breach Summary

In August 2017 (discovered February 2019), the cryptocurrency brokerage Coinmama suffered a data breach affecting about 479,000 subscribers. Exposed data included email addresses, usernames, and passwords stored as MD5 WordPress hashes.

Full threat analysis, exploitation vectors, and principal guidance below.

9 additional sections · verified field analysis · defensive doctrine

Querying breach corpus…
Cross-referencing exposed field types…
Resolving threat-actor attribution…
Compiling principal risk advisory…

479K records analyzed

About Coinmama

Coinmama is a cryptocurrency brokerage service for buying and selling digital currencies.

Why They Hold Your Data

Cryptocurrency brokerage platforms collect identity verification data, contact details, transaction history, payment information, and compliance records tied to digital asset purchases and anti-money-laundering workflows.

Data Points Exposed

3 verified field types
Email Address
Password High
Username

Breach Impact

MD5-based hashes are crackable, exposing reused credentials; the crypto context makes affected users attractive targets for phishing and account-takeover.

Exploitation & Downstream Threats

• Credential stuffing against reused passwords across other platforms | • Targeted phishing campaigns using exposed email addresses

Principal Risk Advisory

What this means for a principal

A financial-institution breach: account, wealth or payment data supports direct fraud and highly credible financial-impersonation scams. For a high-profile principal the main risk is credible impersonation and enrichment of existing exposure.

What You Should Do

  1. Reset any reused passwords and enable MFA on email first, then financial accounts.
  2. Do not use unofficial 'am I affected' lookups; several are themselves harvesting operations.

How ObscureIQ Can Help

  1. Corpus confirmation: determine whether and where the principal (plus household and staff) appear in this dataset and which specific fields are exposed for them.
  2. Exposure mapping: cross-reference the exposed identifiers against broker-available data to size and prioritize the principal's wider footprint.
  3. ThreatWatch tuned to this incident's identifiers and misuse pattern (impersonation and targeting patterns, not generic credential monitoring).

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