Page 3 / Umut Bayram

Umut Bayram is an Associate Security Research Engineer at Picus Security. He specializes in web application security, reverse engineering, and malware analysis. He is an avid CTF player and is also passionate about the applications of artificial intelligence in the cybersecurity field and security research.

HOLLOWGRAPH Backdoor Turns Microsoft 365 Calendars Into a C2 Channel

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CVE-2026-31635 (DirtyDecrypt) Linux Kernel Privilege Escalation Explained

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INC Ransomware Explained: How It Attacks Healthcare and Education

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Astaroth (Guildma) Uses Steganography and Ngrok for C2 Resilience

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FrigidStealer Explained: macOS Infostealer and Gatekeeper Bypass

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Vidar Malware: How the Multithreaded Windows Stealer Works

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The Day an AI Cheated on Its Exam by Hacking Another Company

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CVE-2026-63030 and CVE-2026-60137 (wp2shell): WordPress RCE Explained

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CVE-2025-3248 and CVE-2026-5027: Langflow RCE Vulnerabilities Explained

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Gamaredon (Primitive Bear) APT Profile and MITRE ATT&CK Breakdown

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Everest Ransomware: Triple Threat of Encryption, Access, and Insiders

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Inside JADEPUFFER: Defending Against the First Agentic Ransomware

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