United States
USA
Layer 7 DDoS attacks disrupt Microsoft Outlook and cloud services
Beginning 5 June 2023, distributed application-layer denial-of-service attacks triggered availability problems for Outlook and other Microsoft online services, interrupting customers' access to the company's digital services. Microsoft confirmed DDoS activity but found no evidence of customer-data compromise.
79
Estimated severity
79 / 100
96
Source reliability
96 / 100
Approximate Date
2023-06-05
Targeted Company
MICROSOFT
Targeted Company Supply Chain Impact
Distribution & Fulfillment
Procurement & Sourcing
Production & Manufacturing
Sales (Retail & Ecommerce)
Warehousing
Service Delivery
Unrecognized Impact
Supply Chain Relations
No information
Geographic Impact
Country Targeted Company
Other Affected Countries
No other affected countries reported
Target country
United States
Affected countries
United States
Impacted regions
No information
Operational Impact
Duration
No information
Financial impact (USD M)
No information
Impact types
Service degradationService unavailability
Affected sectors
Technology & IT Services
Affected departments
Information Technology
Attack Profile
Attack types
Distributed denial of service
Attributed threat actors
STORM-1359
Sources
Incident Sources
microsoft.comhttps://www.microsoft.com/en-us/msrc/blog/2023/06/microsoft-response-to-layer-7-distributed-denial-of-service-ddos-attacks/investing.comhttps://www.investing.com/news/stock-market-news/microsoft-says-early-june-service-outages-were-cyberattacks-3107674bleepingcomputer.comhttps://www.bleepingcomputer.com/news/microsoft/microsoft-confirms-azure-outlook-outages-caused-by-ddos-attacks/