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HPE notifies employees of data breach after Russian Office 365 hack

ID: b21febe4-328c-561f-a9e5-cdca68c9ac95

STIX ID: report--b21febe4-328c-561f-a9e5-cdca68c9ac95

Feed Name: Bleeping Computer

Threat Score
75/100

Date Published: 2025-02-07

Date Updated: 2026-04-20

Author: Sergiu Gatlan

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Hewlett Packard Enterprise disclosed that in May 2023 Russian state-linked APT29 (Cozy Bear/Midnight Blizzard) accessed a small percentage of HPE Office 365 mailboxes and a SharePoint server, exfiltrating employee personal information (including driver's licenses, credit card numbers, and Social Security numbers); the breach was reported in SEC filings and notified to impacted individuals.

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