INSPECTING ARCHIVED INTELLIGENCE (OUTDATED VERSION).

Viti's Personal Data Leaked in Cyber Attack

| 2026-10-29 20:23 HIGH LOW DATA BREACH
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Executive Summary
AI-generated
On October 29, hackers breached Bithumb, South Korea's largest virtual asset trading platform, exposing personal info of 6,444 individuals and 715 employees and partners. The leaked information includes sensitive personal data such as resident registration numbers, driver's license numbers, account numbers, and copies of identification documents. An unauthorized user accessed the DaouOffice system on October 27, extracting personal info and files without permission for approximately 59 minutes between 11:28 AM and 12:27 PM. The attackers then posted a personal info leak notice on Bithumb's official website at 5:49 PM. As a result of this attack, there is a risk of identity theft and phishing, as well as 2nd-party fraud due to the leaked information including resident registration numbers and copies of identification documents.
Technical Mitigations AI-generated
• Block access to DaouOffice system using a technique like IP blocking or network segmentation. • Use a product like Naver's security measures, such as blocking access routes and discontinuing groupware usage, after detecting unauthorized user activity. • Hunt for indicators of phishing attempts by monitoring suspicious app installations or remote control requests.
Intelligence Metadata
Actors / Malware / CVEs / Campaigns
Target & Sectors
KR
Incident Timeline
‎October 27
Attackers accessed the DaouOffice system, a company's internal mobile groupware system, for approximately 59 minutes between 11:28 AM and 12:27 PM on October 27.
organisation DaouOffice
The company also revealed that an unauthorized user accessed the DaouOffice system, a company's internal mobile groupware system, on October 27, and extracted personal info and files without permission.
general_metric 59 minutes
Attackers accessed the company's internal mobile groupware for approximately 59 minutes between 11:28 AM and 12:27 PM on October 27.
organisation The Korea Internet & Security Agency
The Korea Internet & Security Agency (KISA) received a report of the incident at 11:39 PM on October 27, while the Personal Information Protection Commission reported the incident at 12:48 AM on October 28.
organisation KISA
The Korea Internet & Security Agency (KISA) received a report of the incident at 11:39 PM on October 27, while the Personal Information Protection Commission reported the incident at 12:48 AM on October 28.
organisation the Personal Information Protection Commission
The Korea Internet & Security Agency (KISA) received a report of the incident at 11:39 PM on October 27, while the Personal Information Protection Commission reported the incident at 12:48 AM on October 28.
‎October 28
The Korea Internet & Security Agency received a report of the incident at 11:39 PM on October 27, while the Personal Information Protection Commission reported it at 12:48 AM on October 28.
organisation The Korea Internet & Security Agency
The Korea Internet & Security Agency (KISA) received a report of the incident at 11:39 PM on October 27, while the Personal Information Protection Commission reported the incident at 12:48 AM on October 28.
organisation KISA
The Korea Internet & Security Agency (KISA) received a report of the incident at 11:39 PM on October 27, while the Personal Information Protection Commission reported the incident at 12:48 AM on October 28.
organisation the Personal Information Protection Commission
The Korea Internet & Security Agency (KISA) received a report of the incident at 11:39 PM on October 27, while the Personal Information Protection Commission reported the incident at 12:48 AM on October 28.
‎2026/10/29
Hackers breached Bithumb, South Korea's largest virtual asset trading platform, exposing personal info of 6,444 individuals and 715 employees.
victims 715 employees
Hackers breach Bithumb, South Korea's largest virtual asset trading platform, exposing personal info of 6,444 individuals and 715 employees and partners.
Cyber attack on Viti, 6,444 customers and 715 employees' personal information leaked, including copies of resident numbers and ID cards..
victims 6,444 customers
Cyber attack on Viti, 6,444 customers and 715 employees' personal information leaked, including copies of resident numbers and ID cards..
organisation KEB Hana Bank
Viti (formerly known as KEB Hana Bank) has confirmed a data breach involving individual customers and will notify affected customers via text message with details of the breach and prevention methods.
organisation Naver
Naver reported the incident at 12:14 PM the same day, taking emergency measures such as blocking access routes and discontinuing groupware usage.
organisation OTP
Naver advised customers to be cautious of the following: not responding to requests for passwords or one-time passwords (OTP), or authentication numbers, and to be wary of suspicious app installations or remote control requests, as well as asset transfers.
organisation TF
The bank has established a dedicated incident response team (TF) to investigate the cause of the breach, in collaboration with its service development partner.
data_breach 646 Bithumb employees
The total number of leaked employee and partner information is 715, including 646 Bithumb employees and 69 external partners.
Tactical Metrics
Metrics
victims
715
Employees
Hackers breach Bithumb, South Korea's largest virtual asset trading platform, exposing personal info of 6,444 individuals and 715 employees and partners.
Cyber attack on Viti, 6,444 customers and 715 employees' personal information leaked, including copies of resident numbers and ID cards..
Metrics
victims
6,444
Customers
Cyber attack on Viti, 6,444 customers and 715 employees' personal information leaked, including copies of resident numbers and ID cards..
Metrics
data_breach
646
Bithumb Employees
The total number of leaked employee and partner information is 715, including 646 Bithumb employees and 69 external partners.
Intelligence Sources
Dailysecu 2026-10-29