CyberNew CyberNew
Threat Intelligence & APT The Record 1 week ago

Japanese media group Nikkei discloses intrusions targeting employees and users

CN
CyberNew Threat Research Desk
• Original Reporting: The Record
CyberNew Threat Intel Assessment
Assessed Severity: HIGH
Impacted Surface
Enterprise Data & Identity Stores
Intelligence Sector
Threat Intelligence & APT

Analyst Takeaway

"A Nikkei printing facility in Osaka, Japan. Credit: Mr.ちゅらさん / Wikimedia Commons Japanese media group Nikkei discloses intrusions targeting employees and users The Japanese media giant Nikkei disclosed two cyber incidents involving employee email accounts on Sunday, joining a growing list of major Japanese companies hit by data breaches in recent weeks. In the more recent incident, an attacker..."

Recommended Defense & Mitigation

  • Access Review: Audit administrative roles, enforce phishing-resistant MFA, and review privilege escalations.
  • Credential Rotation: Rotate high-privilege service credentials and tokens associated with impacted services.
Curated & Verified by CyberNew Threat Intelligence Desk Standard Defense Framework (NIST / MITRE ATT&CK)
Nikkei
A Nikkei printing facility in Osaka, Japan. Credit: Mr.ちゅらさん / Wikimedia Commons

Japanese media group Nikkei discloses intrusions targeting employees and users

The Japanese media giant Nikkei disclosed two cyber incidents involving employee email accounts on Sunday, joining a growing list of major Japanese companies hit by data breaches in recent weeks.

In the more recent incident, an attacker compromised a Microsoft 365 account belonging to a Nikkei employee and used it to send roughly 9,000 phishing emails to people inside and outside the company, including journalistic sources.

Source Verification & Original Intelligence

This threat report was reviewed by CyberNew analysts and cross-referenced with primary security disclosures from The Record.

Primary Advisory →