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The Top 5 Cyberattacks of May 2020

ID: 2da7af96-66cd-5676-8f35-c212d8b65c7c

STIX ID: report--2da7af96-66cd-5676-8f35-c212d8b65c7c

Feed Name: Arctic Wolf Blog

Threat Score
70/100

Date Published: 2020-06-09

Date Updated: 2026-04-26

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Executive summary: This report catalogs the top five cyber incidents of May 2020 — several healthcare breaches involving phishing and ransomware (BJC Healthcare, Magellan Health, Asheville Plastic Surgery / Maze), a large NTT compromise that reached internal Active Directory and affected 621 customer records, and a DDoS against Minneapolis city systems — and highlights attacker methods, impacts, and organizational responses.

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