The Defensive Line Podcast
The Defensive Line Weekly is a curated weekly intelligence briefing for blue teamers and security leaders — produced as both a written Substack newsletter and this podcast. Each week we cut through the noise to the stories that actually matter for defenders, with clear implications and practical defensive actions. Topic 1: QEMU Virtual Machines Weaponised to Blind EDR * Sophos X-Ops — QEMU abused to evade detection and enable ransomware delivery [https://www.sophos.com/en-us/blog/qemu-abused-to-evade-detection-and-enable-ransomware-delivery] * BleepingComputer — Payouts King ransomware uses QEMU VMs to bypass endpoint security [https://www.bleepingcomputer.com/news/security/payouts-king-ransomware-uses-qemu-vms-to-bypass-endpoint-security/] Topic 2: Helpdesk Impersonation to Data Exfiltration * Microsoft Threat Intelligence — Cross-tenant helpdesk impersonation data exfiltration human-operated intrusion playbook [https://www.microsoft.com/en-us/security/blog/2026/04/18/crosstenant-helpdesk-impersonation-data-exfiltration-human-operated-intrusion-playbook/] Topic 3: Windows and Defender Zero-Days * Huntress — via Twitter/X [https://x.com/HuntressLabs/status/2044882050314817880] * BleepingComputer — Recently leaked Windows zero-days now exploited in attacks [https://www.bleepingcomputer.com/news/microsoft/recently-leaked-windows-zero-days-now-exploited-in-attacks/] * BleepingComputer — New Microsoft Defender RedSun zero-day PoC grants SYSTEM privileges [https://www.bleepingcomputer.com/news/microsoft/new-microsoft-defender-redsun-zero-day-poc-grants-system-privileges/] * The Hacker News — Three Microsoft Defender zero-days [https://thehackernews.com/2026/04/three-microsoft-defender-zero-days.html] Honourable Mentions * Darktrace — Inside ZionSiphon: OT malware targeting Israeli water systems [https://www.darktrace.com/blog/inside-zionsiphon-darktraces-analysis-of-ot-malware-targeting-israeli-water-systems] * Ox Security — MCP supply chain advisory: RCE vulnerabilities across the AI ecosystem [https://www.ox.security/blog/the-mother-of-all-ai-supply-chains-critical-systemic-vulnerability-at-the-core-of-the-mcp/] * Aonan Guan — Comment-and-control: prompt injection credential theft via Claude, Gemini, Copilot [https://oddguan.com/blog/comment-and-control-prompt-injection-credential-theft-claude-code-gemini-cli-github-copilot/] * BleepingComputer — ATHR vishing platform uses AI voice agents for automated attacks [https://www.bleepingcomputer.com/news/security/new-athr-vishing-platform-uses-ai-voice-agents-for-automated-attacks/] * Dark Reading — Tycoon 2FA hackers adopt device code phishing [https://www.darkreading.com/threat-intelligence/tycoon-2fa-hackers-device-code-phishing] This is a public episode. If you would like to discuss this with other subscribers or get access to bonus episodes, visit thedefensiveline.substack.com [https://thedefensiveline.substack.com?utm_medium=podcast&utm_campaign=CTA_1]
21 episodios
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