[Sentinel] #11 - Bouygues Telecom Breached: 6.4M Exposed!

🛡️ IN TODAY’S EDITION

• 🧨 1. Breach of the Week

• 🧠 2. AppSec

• ☁️ 3. CloudSec

• 📡 4. Attack Surface

• 🔓 5. Free Resources for You

  • 👉 One Quick Question

🧨 1. Breach of the Week

🧠 2. AppSec

This week, critical zero-day exploits hit major platforms, focusing on remote code execution and privilege escalation. Key highlights:

• Microsoft fixed 107 vulnerabilities in August Patch Tuesday, including a publicly disclosed zero-day in Windows Kerberos allowing domain admin privilege escalation

• Two zero-days in SharePoint Servers (RCE and auth bypass) exploited in the wild using the ToolShell exploit, prompting emergency patches

• WinRAR zero-day actively exploited by threat actors to achieve arbitrary code execution through crafted archives

📍 Takeaway: Vigilant patching and immediate updates for application vulnerabilities are non-negotiable. Attackers quickly weaponize zero-days, making fast remediation a must!

☁️ 3. CloudSec

Cloud environments came under multi-vector attack campaigns this past week, including cryptomining and SaaS compromise:

• The Soco404 cryptomining campaign targets cloud setups by exploiting PostgreSQL, Apache Tomcat, and cloud misconfigurations to deploy loaders and persistence mechanisms

• Microsoft Exchange Server faces a privilege escalation vulnerability (CVE-2025-53786) that enables attackers to pivot into cloud services like Office 365, with thousands of vulnerable servers still exposed

• Zooming in on SaaS: Salesforce environments breached via vishing-based OAuth token theft impacting Chanel, Google, and Pandora, exposing valuable customer data

📍 Takeaway: Cloud security demands layered controls, from API permission restrictions and multi-factor authentication to continuous anomaly monitoring. Don’t let token theft or config flaws become your Achilles’ heel.

📡 4. Attack Surface

Emerging threats continue pushing the limits of attackers’ creativity:

• AI-driven malware like the "Koske" polyglot JPEG cryptominer evades traditional detection by hiding rootkit payloads inside image files

• Social engineering grows more sophisticated with AI-enabled deepfakes and vishing campaigns, expanding attackers’ footprint beyond technical flaws

• New kernel exploits, including a Windows kernel crash bug found in Rust code, threaten widespread enterprise disruptions through denial of service and system crashes.

📍 Takeaway: Attack surfaces are exploding in complexity. Integrate behavioral monitoring, enforce strict upload policies, and train users to resist social manipulation.

🔓 5. Free Resources for You

Here’s what I’ve found most helpful this week:

🛡️ Wazuh – Free SIEM & XDR for threat detection [get it]
🧼 ClamAV – Antivirus for files, emails & endpoints [scan]
🧪 Cuckoo – Malware analysis sandbox [analyze]
🕷️ Burp (Free) – Web app vuln scanner & proxy [test]
🛰️ Nikto – Web server scanner for known flaws [scan]
💥 My “Top 5 Free Cybersecurity Tools for 2025” – [view]

👉 One Quick Question

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This newsletter is crafted with focus, scepticism, and zero hype. Just field-relevant insights at the intersection of cybersecurity and AI.

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