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Hackers stole 340,000 Social Security numbers from government consulting firm

ID: c10aa14d-6dcc-55da-b6a9-b715b6cf2a43

STIX ID: report--c10aa14d-6dcc-55da-b6a9-b715b6cf2a43

Feed Name: TechCrunch Security News

Threat Score
70/100

Date Published: 2024-04-08

Date Updated: 2026-04-23

Author: Lorenzo Franceschi-Bicchierai

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Greylock McKinnon Associates disclosed a May 2023 cyberattack that resulted in the theft of personal and Medicare-related data — including names, dates of birth, addresses, some medical and insurance information, Medicare claim numbers, and up to 341,650 Social Security numbers — with affected individuals notified in February 2024; technical details and attacker attribution remain unspecified.

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