May 15, 2023
1 new incident, 0 with updates.
Started
- ClosedPatched
Storm-0558: stolen Microsoft signing key used to read government email
China-based Storm-0558 used a stolen Microsoft consumer (MSA) signing key, plus a token validation bug, to forge tokens and read Exchange Online and Outlook.com mail at about 25 organisations, including US government agencies. Microsoft later said the key leaked through a 2021 crash dump.
Microsoft Exchange Online / Outlook.com (Azure AD and MSA token signing)Closed Sep 6, 2023
