Vishing campaign abuses Microsoft Teams to give attackers a foothold in company networks
2026-09-01T14:51:39Z•ce8f96a9473c11f0e484b95c0ecfdf0b7706fc4a105fece6d58622f35fcba63b
AI crawler impersonationCrowdSecGitHub malwareIAMMicrosoft TeamsNIS2RevStealerRhysidaSpring Ringaccess controlautomated scanningcredential exposurecredential theftcryptocurrency wallet theftdata breachdenial of serviceextortioninfostealerpost-quantum cryptographyransomwareremote accesssocial engineeringvishingvoice phishing
What happened
Help Net Security reports multiple cybersecurity developments, including a Microsoft Teams vishing campaign dubbed Spring Ring, a fake Claude Opus 5 GitHub repository delivering RevStealer, the Berlin government network breach and extortion attempt attributed to Rhysida ransomware, AI-crawler impersonation used to find exposed credentials, CrowdSec security fixes, and guidance on NIS2, post-quantum cryptography, and identity governance.
Why it matters
A reviewed impact interpretation has not been published for this record.
Evidence and limitations
- Source ID
- helpnetsecurity
- Record identifier
- ce8f96a9473c11f0e484b95c0ecfdf0b7706fc4a105fece6d58622f35fcba63b
- Enrichment time
- 2026-09-01T14:51:39Z
- AI-assisted enrichment
- Yes
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