Guy has a B.A. (IT) from University of Quebec and holds the prestigious GIAC Security Expert (GSE) certification as well as the GIAC GSEC(G), GCIA(G), GCIH(G), GCUX(G), GCFA, GPEN certifications.

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Recent Diaries:

• Command Injection Exploit For PHPUnit before 4.8.28 and 5.x before 5.6.3 [Guest Diary]
• Vulnerability Symbiosis: vSphere?s CVE-2024-38812 and CVE-2024-38813 [Guest Diary]
• Data Analysis: The Unsung Hero of Cybersecurity Expertise [Guest Diary]
• SANS ISC Internship Setup: AWS DShield Sensor + DShield SIEM [Guest Diary]
• October 2024 Activity with Username chenzilong

Recent Diaries:

• Security related Docker containers
• Tool update: mac-robber.py and le-hex-to-ip.py
• New tool: linux-pkgs.sh
• Tool updates: le-hex-to-ip.py and sigs.py
• Wireshark updates

Recent Diaries:

• July 2023 Microsoft Patch Update
• Warranty Repairs and Non-Removable Storage Risks
• Apple May 2021 Security Updates
• Critical Vuln in vCenter vmdir (CVE-2020-3952)
• Oracle Critical Patch Update Release

Recent Diaries:

• The strange case of disappearing Russian servers
• Self-contained HTML phishing attachment using Telegram to exfiltrate stolen credentials
• Phishing links with @ sign and the need for effective security awareness building
• Script obfuscation using multiple instances of the same function
• "Reply-chain phishing" with a twist

Jesse La Grew has been an IT professional within higher education for over 20 years. He holds a variety of GIAC certifications including the GDSA, GCCC, GCFA, GCFE, GCIA, GPYC, GSOC, GCIH, GSEC, GISF, GCTI, GCPM and GSTRT and is also a CISSP. He recently received his Bachelor's Degree at SANS Technology Institute and is progressing through his Master's program at the same institution. Jesse's background in IT started in a desktop support role. This transitioned into a cyber security focus when becoming involved in building and supporting environments meeting PCI and FISMA compliance standards. He currently works as Chief Information Security Officer at Madison College.

Recent Diaries:

• [Guest Diary] A Deep Dive into TeamTNT and Spinning YARN
• CURLing for Crypto on Honeypots
• [Guest Diary] Business Email Compromise
• [Guest Diary] Using Zeek, Snort, and Grafana to Detect Crypto Mining Malware
• [Guest Diary] Insights from August Web Traffic Surge

Renato Marinho is Chief Research Officer at Morphus Labs. His journey in the area began in 2001, when he created Nettion, one of the first firewalls to use the contemporary UTM (Unified Threat Management) concept. Experienced in cyber security, Marinho was internationally recognized in 2016 by his research that unveiled Mamba, the first full disk encryption ransomware. At Morphus Labs, he oversees research, innovation and development of new products. Master and PhD candidate in Applied Informatics, he is also professor at University of Fortaleza teaching Computer Forensics in the post-graduate course. He is also a speaker having presented at Ignite Cybersecurity Conference, BSides Delaware, BSides Vienna, WSKS Portugal and Brazilian CSIRTs Forum.

Recent Diaries:

• Microsoft November 2024 Patch Tuesday
• Microsoft August 2024 Patch Tuesday
• Microsoft May 2024 Patch Tuesday
• Microsoft February 2024 Patch Tuesday
• Microsoft September 2023 Patch Tuesday

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Recent Diaries:

• Sandfly Security
• Exploratory Data Analysis with CISSM Cyber Attacks Database - Part 2
• Exploratory Data Analysis with CISSM Cyber Attacks Database - Part 1
• Prowler v3: AWS & Azure security assessments
• Chainsaw: Hunt, search, and extract event log records

Xavier Mertens is a freelance security consultant based in Belgium. Xavier's own company (https://xameco.be) offers services like incident handling, forensic, SOC activities, and pentesting. He holds GCIA, GFCE, GCFA, GXPN, GREM, GDAT, GNFA, GCTI, GPYC SANS certifications but also CISSP, and CISA. Xavier is a SANS Certified Instructor (FOR610 - Malware Analysis and Reverse Engineering). His blog about security is https://blog.rootshell.be and he is co-organizer of the BruCON security conference (http://www.brucon.org).

Recent Diaries:

• Christmas "Gift" Delivered Through SSH
• Python Delivering AnyDesk Client as RAT
• From a Regular Infostealer to its Obfuscated Version
• An Infostealer Searching for « BIP-0039 » Data
• Detecting the Presence of a Debugger in Linux

Mr. Santander Peláez currently serves as the CTO of Transportadora de Gas Internacional in Bogotá, Colombia. His areas of interest are Intrusion Detection, Computer Forensics, Incident Response, SCADA Security, cyber defense, threat intelligence and threat hunting.

Recent Diaries:

• Noticing command and control channels by reviewing DNS protocols
• Controlling network access to ICS systems
• Management of DMARC control for email impersonation of domains in the .co TLD - part 2
• Management of DMARC control for email impersonation of domains in the .co TLD - part 1
• Security headers you should add into your application to increase cyber risk protection

Didier Stevens (Microsoft MVP Consumer Security) holds many certifications from SANS, Microsoft, Cisco, ... He is a Senior Analyst (NVISO https://www.nviso.be). Didier started his own company in 2012 to provide IT security training services (http://DidierStevensLabs.com). You can find his open source security tools on his IT security related blog at https://blog.DidierStevens.com.

Recent Diaries:

• Extracting Files Embedded Inside Word Documents
• Quickie: Mass BASE64 Decoding
• Quick & Dirty Obfuscated JavaScript Analysis
• Decrypting a PDF With a User Password
• Wireshark 4.4.2 Released

Dr. Tok is currently a Senior Consultant at JT Consultancy & Management Pte. Ltd. and a Research Fellow at ASSET (Automated Systems SEcuriTy) Research Group in Singapore University of Technology and Design (SUTD) under the Information Systems Technology and Design (ISTD) Pillar. He was a recipient of the SG Digital (Postgraduate) Scholarship program from Infocomm Media Development Authority (IMDA), and won the Cybersecurity Awards in 2019 under the Professional category for his contributions to the Singapore information security industry. Yee Ching is a SANS Lethal Forensicator and also serves as a Co-Opted Committee Member in the Association of Information Security Professionals (AiSP). For more information, please visit https://poppopretn.com/aboutme/.

Recent Diaries:

• Rolling Back Packages on Ubuntu/Debian
• Evolution of Artificial Intelligence Systems and Ensuring Trustworthiness
• 5Ghoul Revisited: Three Months Later
• 5Ghoul: Impacts, Implications and Next Steps
• VMware Releases Security Patches for Fusion, Workstation and Aria Operations for Logs

Dr. Johannes Ullrich is the Dean of Research and a faculty member of the SANS Technology Institute. In November of 2000, Johannes started the DShield.org project, which he later integrated into the Internet Storm Center. His work with the Internet Storm Center has been widely recognized. In 2004, Network World named him one of the 50 most powerful people in the networking industry. Secure Computing Magazine named him in 2005 one of the Top 5 influential IT security thinkers. His research interests include IPv6, Network Traffic Analysis and Secure Software Development. Johannes is regularly invited to speak at conferences and has been interviewed by major publications, radio as well as TV stations. He is a member of the SANS Technology Institute's Faculty and Administration as well as Curriculum and Long Range Planning Committee. As chief research officer for the SANS Institute, Johannes is currently responsible for the GIAC Gold program. Prior to working for SANS, Johannes worked as a lead support engineer for a Web development company and as a research physicist. Johannes holds a PhD in Physics from SUNY Albany and is located in Jacksonville, Florida. More Details: http://www.linkedin.com/in/johannesullrich

Recent Diaries:

• Exploit attempts inspired by recent Struts2 File Upload Vulnerability (CVE-2024-53677, CVE-2023-50164)
• Apple Updates Everything (iOS, iPadOS, macOS, watchOS, tvOS, visionOS)
• Microsoft Patch Tuesday: December 2024
• Apple Fixes Two Exploited Vulnerabilities
• Exploit attempts for unpatched Citrix vulnerability

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Recent Diaries:

• NMAP Scanning without Scanning (Part 2) - The ipinfo API
• Scanning without Scanning with NMAP (APIs FTW)
• Why yq? Adventures in XML
• Got MFA? If not, Now is the Time!
• API Rug Pull - The NIST NVD Database and API (Part 4 of 3)

Recent Diaries:

• Pi-Hole Pi4 Docker Deployment
• Are Local LLMs Useful in Incident Response?
• Zeek and Defender Endpoint
• IR Case/Alert Management
• Live Linux IR with UAC

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Recent Diaries:

• Credential Guard and Kerberos delegation
• The amazingly scary xz sshd backdoor
• Scanning and abusing the QUIC protocol
• Survival time for web sites
• Some things never change ? such as SQL Authentication ?encryption?