Day 104: Stealthy Rats, Visibility Gaps, and the Shadow Market of Zero-Days 🐀🕳️🌒

Today’s stories feel like whispers behind closed doors — exploits quietly for sale, malware slipping past EDR, and nation-state campaigns that don’t need loud moves to win. From healthcare to energy grids, the threat isn’t always in the attack — it’s in how little we see of it.

🛠️ Fortinet Zero-Day Allows Arbitrary Code Execution
Fortinet is once again in the spotlight, disclosing a critical zero-day that allows remote code execution on vulnerable systems. Details are sparse, but exploitation is already rumored. Security firm reports say a working exploit may be circulating in dark web markets.
🔗 https://www.darkreading.com/vulnerabilities-threats/fortinet-zero-day-arbitrary-code-execution
🔗 https://gbhackers.com/fortigate-0-day-exploit-allegedly-up-for-sale/

🕳️ Chinese APT Exploits EDR Blind Spots for Espionage
A new campaign tied to a Chinese APT group shows how attackers are exploiting gaps in endpoint detection and response (EDR) visibility — particularly around system-native tools and living-off-the-land techniques. Espionage isn’t flashy. It’s efficient.
🔗 https://www.darkreading.com/threat-intelligence/chinese-apt-exploit-edr-visibility-gap-cyber-espionage

🧬 ResolverRAT Targets Healthcare Sector with Stealth & Precision
A fresh RAT variant dubbed ResolverRAT is being deployed in healthcare-focused campaigns. It blends stealth with adaptive tactics and leverages cloud platforms for command and control. Healthcare remains a high-stakes target with low tolerance for downtime.
🔗 https://thehackernews.com/2025/04/resolverrat-campaign-targets-healthcare.html
🔗 https://www.darkreading.com/cloud-security/it-rat-stealthy-resolver-malware

📧 Real-Time Phishing Tactics Bypass MFA & Timeouts
New phishing campaigns are using real-time checks and session theft techniques to bypass MFA protections. It’s a chilling advancement — proving that even “secure” auth methods can be sidestepped when timing and automation are tuned just right.
🔗 https://thehackernews.com/2025/04/phishing-campaigns-use-real-time-checks.html

💸 Crypto Dark Web Accounts Found Linked to Threat Intel Firm
A major threat intelligence firm is now under scrutiny after dark web accounts tied to its infrastructure were uncovered — some allegedly used for purchasing crypto or malware kits. Whether it’s infiltration, testing, or something darker… the line is thin.
🔗 https://www.darkreading.com/threat-intelligence/threat-intel-firm-crypto-dark-web-accounts

🔌 Vulnerabilities in Solar Power Systems Expose the Grid
A sobering report reveals critical vulnerabilities in commercial solar energy management platforms — exploitable for grid disruption or lateral movement into connected enterprise networks. Green energy needs red team thinking.
🔗 https://securityonline.info/vulnerabilities-in-solar-power-systems-threaten-power-grids/

🗞️ Weekly Recap: Windows 0-Days, VPN Exploits, and Fortinet Firestorms
A stacked recap of this week’s biggest cyber events — from actively exploited Windows flaws to new VPN vulnerabilities and the Fortinet whirlwind. The signal? The perimeter is more porous than ever.
🔗 https://thehackernews.com/2025/04/weekly-recap-windows-0-day-vpn-exploits.html

💭 Reflection
It’s Day 104, and I’m seeing the same lesson in every feed: visibility without clarity is just noise. Whether it’s blind spots in EDR, delayed patch cycles, or phishing that adapts in real time, we’re not losing because of lack of tools — we’re losing because the threats know where we aren’t looking. As I grind through CISSP prep, it’s clear: monitoring isn’t enough. We need interpretation. And speed.

This isn’t a chess game anymore. It’s hide-and-seek — and the prize is control. 🎯🧠🛡️

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