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sbisec.co.jp Domain Breach Exposure Report

Risk Score

High Risk

Massive event volume or critical assets compromised.

AI Findings Summary

Critical

The domain sbisec.co.jp has experienced a high volume of data breaches, totaling 73,399 events, and 16,898 active infostealer logs over the reporting period. These events primarily involve client data, with a significant portion originating from "Combolist sources" within leak repositories. The timeline indicates a surge in client-related incidents from September 2025 through April 2026, with employee-related incidents also appearing during this period. Malware families such as LummaC2, X-Files, and Rhadamanthys are frequently observed. Given the high number of data breaches and active infostealer logs, this exposure presents a critical risk. The prevalence of client data exposure and the use of infostealers suggest a high likelihood of credential compromise and potential financial fraud. Prioritization should focus on immediate containment of active infostealer threats, thorough investigation of all data breach incidents, and strengthening client-facing authentication and data protection mechanisms. Remediation should include enhanced endpoint security, user education on phishing and credential hygiene, and a review of data access controls.

Total Events

90,297
credential exposure events

Employee Affected Events

175
account email domain = sbisec.co.jp

Client Affected Events

90,122
service target = sbisec.co.jp

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12-Month Events Timeline

Event volume by breach date, employee VS client

EmployeesClients
30,00020,00010,0000
peak month 25,281
Jul 25Sep 25Nov 25Jan 26Mar 26May 26Jun 26

Infostealers VS Data Breaches

Live stealer logs VS data breaches

Infostealer logs
Events16,898
Share19%
Data breaches
Events73,399
Share81%
Infostealer logs (19%)
16,898events
Data breaches (81%)
73,399events

175 compromised employee accounts pose an infrastructure risk, while 90,122 leaked client credentials create regulatory liability.

Antivirus Distribution

Security Tools on Infected Endpoints

Windows Defender224
Windows Defender McAfee78
Windows Defender マカフィー ウイルススキャン49
Windows Defender ウイルスバスター クラウド マカフィー McAfee18
Trend Micro18
ノートン 36013
Windows Defender ESET Security9
Windows Defender ウイルスバスター クラウド8
Windows Defender ウイルスバスター クラウド McAfee マカフィー7

Malware Families Distribution

Distribution of Active Stealer Strains

LummaC22,195
X-Files2,182
Rhadamanthys1,874
Vidar1,174
Acreed932
Redline797
StealC248
Millenium215
Raccoon172

Top Login URLs

Top exposed services found in the event results

  1. 1https://site1.sbisec.co.jp/ETGate/3,287
  2. 2https://site2.sbisec.co.jp/ETGate/2,898
  3. 3https://www.sbisec.co.jp/ETGate/2,666
  4. 4https://jderivatives.sbisec.co.jp/main/trade/future2,512
  5. 5sbisec.co.jp2,511
  6. 6site2.sbisec.co.jp/ETGate/2,161
  7. 7https://m.sbisec.co.jp1,940
  8. 8https://sbisec.co.jp1,940
  9. 9m.sbisec.co.jp1,840
  10. 10https://www.sbisec.co.jp/ETGate1,775

Infostealer By Geography

Shows the distribution of Infostealer-related credential exposure events across different geographic regions. The location is determined by analyzing the metadata of the infected machines associated with each event.

Japan
Events10,222
Algeria
Events109
Switzerland
Events63
United States
Events48
Brazil
Events41
Egypt
Events30
France
Events26
China
Events25

Country Breakdown

  1. 1Japan10,222
  2. 2Algeria109
  3. 3Switzerland63
  4. 4United States48
  5. 5Brazil41
  6. 6Egypt30
  7. 7France26
  8. 8China25

Services Classification Distribution

Blast radius - closer to core = more critical infrastructure, size = credential volume

Intranet7

Operating System Distribution

Distribution of compromised endpoint builds

Windows 102,656
Windows 111,258
Windows 11 24H2 build 26100 (64 Bit)1,045
Windows 10 Home879
Windows 11 Pro (10.0.22631) x64778

Leak Repository Classification

Where the exposed records currently reside

0
Named breaches
72,955
Combolist pools
444
Unattributed dumps

Disclaimer: This report includes AI-generated content. AI can make mistakes, so verify important findings independently before taking action.