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Obfuscating IP Addresses as Hostnames https://isc.sans.edu/diary/Obfuscating%20IP%20Addresses%20as%20Hostnames/33280 Microsoft Paint and Photos Embed Server-Issued GUIDs as Invisible Watermarks in Locally-Generated Images https://xusheng.dev/posts/reversing/mspaint_invisible_watermark/main/ FTP Banners The New Dead Drop Resolver Delivering Novel RATs https://socradar.io/blog/ftp-banners-new-dead-drop-resolver-rats/ My Upcoming Classes https://www.sans.org/profiles/dr-johannes-ullrich

CoSnitch: When Your AI Assistant Becomes Its Own Whistleblower https://www.varonis.com/blog/cosnitch GEEKOM confirms malware was hosted on its website https://videocardz.com/newz/geekom-apologizes-for-hosting-malware-in-driver-package-for-its-mini-pcs Medusa Ransomware Update https://www.cisa.gov/sites/default/files/2026-08/aa25-071a-stopransomware-medusa-ransomware-508c.pdf How Google is Making Private AI Practical with Homomorphic Encryption https://blog.google/security/how-google-is-making-private-ai-practical-with-homomorphic-encryption/ My Upcoming Classes https://www.sans.org/profiles/dr-johannes-ullrich

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Microsoft Patch Tuesday https://isc.sans.edu/diary/Microsoft%20Patch%20Tuesday%20August%202026/33236 Zoom Vulnerablities CVE-2026-53413, CVE-2026-53414, and CVE-2026-53415 https://a.security/blog/asecurity-zoomsday Mozilla Revokes GPG Key https://blog.mozilla.org/security/2026/08/10/updated-gpg-key-for-signing-firefox-and-thunderbird-releases/ Rogue Inflight Wifi https://www.bleepingcomputer.com/news/security/delta-probes-wi-fi-deauth-attack-on-flight-carrying-def-con-attendees/ My Upcoming Classes https://www.sans.org/profiles/dr-johannes-ullrich

Botnet Hunting for Vulnerabilities in Diagnostic Tools https://isc.sans.edu/diary/Botnet%20Hunting%20for%20Vulnerabilities%20in%20Diagnostic%20Tools/33214 Inside Greatness: Telegram-Distributed M365 AiTM PhaaS https://zerobec.com/blog/greatness-phaas-aitm-and-device-code-phishing A Deep Dive Into the Latest XCSSET Version https://unit42.paloaltonetworks.com/xcsset-v40-malware-analysis/ Strengthening NuGet Supply Chain Security: Reducing API Key Lifetime https://devblogs.microsoft.com/dotnet/strengthening-nuget-supply-chain-security-reducing-api-key-lifetime/ My Upcoming Classes https://www.sans.org/profiles/dr-johannes-ullrich