#rhysida-ransomware

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#malvertising #oysterloader #code-signing-certificates #vanilla-tempest #oyster-backdoor #code-signing-abuse
Information security
fromIT Pro
3 days ago

A notorious ransomware group is spreading fake Microsoft Teams ads to snare victims

Search engine ad campaigns impersonating Microsoft Teams distribute OysterLoader, an initial-access loader that deploys backdoors for long-term device and network access.
Information security
fromThe Hacker News
3 weeks ago

Microsoft Revokes 200 Fraudulent Certificates Used in Rhysida Ransomware Campaign

Microsoft revoked over 200 certificates used by Vanilla Tempest to sign fake Teams installers delivering the Oyster backdoor and Rhysida ransomware.
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