MOIN BizPlus leak of documents customers submitted, such as ID and bankbook copies

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Made public

What leaked16

Hard to replace

  • ID card image
  • Driver's licence number
  • Income, balances, loans, credit or other financial details
  • ID document number
  • Passport number
  • Bank account number
  • Mobile number
  • Home or delivery address
  • Email address
  • Other profile data

Permanent

  • Resident registration number
  • Date of birth
  • Names of family members
  • Purchase or order history
  • Full name
  • Gender
  • ID card imagecopies of ID documents with photo: resident registration card, driver's licence, passport, alien registration card, domestic residence report card, youth ID card or Japanese residence card, depending on what each customer submitted
  • Resident registration numberon resident registration cards, driver's licences, youth ID cards, some passports, resident register extracts, family relation certificates and shareholder registers
  • Driver's licence numberlicence number and the card's serial code
  • Income, balances, loans, credit or other financial detailsshareholder registers: share type, number of shares, stake and acquisition date
  • ID document numberalien registration number, domestic residence report number or Japanese residence card number
  • Bank account numberbankbook copies · holder, bank, branch, account number; counterparties' account numbers on invoices and contracts
  • Names of family membersnames, resident registration numbers and relationship of household members and family (parents, spouse, children) on resident register extracts and family relation certificates
  • Mobile numbercounterparties' phone numbers on remittance documents · type not stated
  • Home or delivery addresson ID documents other than passports, resident register extracts (with address history) and shareholder registers; counterparties' addresses on remittance documents
  • Purchase or order historytransaction amounts, items, details and dates on invoices, contracts and tuition bills
  • Email addresscounterparties' email addresses on remittance documents
  • Other profile datanationality, residence status and expiry dates on ID documents; business registration details · company name, registration numbers, business address

To-dos10 · about 1 h 30 min in all

  1. Block new loans and cards in your nameabout 10 minStops: loans or cards in your name · Limits harm from: scam calls, applications with your ID (opens in a new tab)
  2. Block non-face-to-face account opening in your nameabout 10 minStops: bank account in your name · Limits harm from: scam calls (opens in a new tab)
  3. Register as an exposed person with the FSSabout 10 minLimits harm from: scam calls, loans or cards in your name, bank account in your name, applications with your ID (opens in a new tab)
  4. Know the scam pattern: calls and texts that cite these leaked detailsabout 5 minfreeLimits harm from: scam calls, phishing messages
  5. Check your credit records and block status on credit4uabout 10 minfreeHelps you notice: loans or cards in your name (opens in a new tab)
Company
MOIN BizPlus
When it happened
–
Company detected it
Made public
Notice
Leak confirmed
Affected
unknown; customers whose documents were submitted to MOIN up to about 07:24 KST on October 19, 2023, and the shareholders, counterparties and family members named in those documents · the company notice gives no count

How the facts developed

  1. Company notice: an outside attacker took document files that customers had submitted, at about 02:30 KST on October 23, 2026; MOIN found it at about 15:00 KST on October 29, 2026

Outcome

MOIN reported the leak to the Personal Information Protection Commission (through KISA) and to the Financial Supervisory Service (company notice). No decision.

Sources