Recent Diaries:

• SRUM-DUMP Version 3: Uncovering Malware Activity in Forensics
• domain_stats.py a web api for SEIM phishing hunts
• System Resource Utilization Monitor
• Some tools updates
• Powershell Malware - No Hard drive, Just hard times

John Bambenek is President of Bambenek Labs, a threat intelligence and digital investigations firm. He has spent 20 years in the industry helping research emerging threats and leading large-scale intelligence sharing communities to engage in targeted disruption of criminal activities online. He has developed a variety of techniques to conduct digital surveillance that is used to monitor domain generation algorithms and malware configurations which are used by thousands of organizations world-wide. In addition, he tracks financial transactions of various neonazi and supremacist individuals and organizations. He has spoken at conferences around the world, has published two books in addition to several book chapters and articles, and he once appears on the Daily Show with Jon Stewart.

Recent Diaries:

• Prophetic Post by Intern on CVE-2023-1389 Foreshadows Mirai Botnet Expansion Today
• Writing Yara Rules for Fun and Profit: Notes from the FireEye Breach Countermeasures
• Hunting for SigRed Exploitation
• VMWare Security Advisory on DoS Vulnerability in ESXi
• MSFT July 2019 Patch Tuesday

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:

• Web Scanning Sonicwall for CVE-2021-20016
• RedTail, Remnux and Malware Management [Guest Diary]
• Network Infraxploit [Guest Diary]
• Exploring Statistical Measures to Predict URLs as Legitimate or Intrusive [Guest Diary]
• File Hashes Analysis with Power BI from Data Stored in DShield SIEM

Recent Diaries:

• Zero Trust and Entra ID Conditional Access
• Cisco Security Advisory: Default Credentials
• Exploit o' the day: DROWN
• Disaster Recovery Starts with a Plan
• GnuPG (GPG) 2.1.9 release announced

Recent Diaries:

• Tool update: mac-robber.py
• Unfurl v2025.02 released
• Tool update: sigs.py - added check mode
• New tool: immutable.py
• Security related Docker containers

Recent Diaries:

• It's 2025... so why are obviously malicious advertising URLs still going strong?
• A Tale of Two Phishing Sites
• SSL 2.0 turns 30 this Sunday... Perhaps the time has come to let it die?
• An unusual "shy z-wasp" phishing
• Changes in SSL and TLS support in 2024

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:

• Honeypot Iptables Maintenance and DShield-SIEM Logging
• [Guest Diary] Leveraging CNNs and Entropy-Based Feature Selection to Identify Potential Malware Artifacts of Interest
• [Guest Diary] Malware Source Servers: The Threat of Attackers Using Ephemeral Ports as Service Ports to Upload Data
• [Guest Diary] How Access Brokers Maintain Persistence
• Extracting Practical Observations from Impractical Datasets

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 April 2025 Patch Tuesday
• Microsoft February 2025 Patch Tuesday
• Microsoft January 2025 Patch Tuesday
• Microsoft November 2024 Patch Tuesday
• Microsoft August 2024 Patch Tuesday

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Recent Diaries:

• ModelScan - Protection Against Model Serialization Attacks
• 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

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:

• Example of a Payload Delivered Through Steganography
• Online Services Again Abused to Exfiltrate Data
• Obfuscated Malicious Python Scripts with PyArmor
• Python Bot Delivered Through DLL Side-Loading
• Shellcode Encoded in UUIDs

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Recent Diaries:

• To Simulate or Replicate: Crafting Cyber Ranges
• A Case for Lockdown and Isolation (and not the Covid kind)
• Microsoft April 2021 Patch Tuesday
• Building a .freq file with Public Domain Data Sources
• What is "THAT" Address Doing on my Network

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:

• Steganography Analysis With pngdump.py
• xorsearch.py: "Ad Hoc YARA Rules"
• Wireshark 4.4.6 Released
• xorsearch.py: Searching With Regexes
• XORsearch: Searching With Regexes

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:

• An ontology for threats, cybercrime and digital forensic investigation on Smart City Infrastructure
• The Curious Case of a 12-Year-Old Netgear Router Vulnerability
• PacketCrypt Classic Cryptocurrency Miner on PHP Servers
• Rolling Back Packages on Ubuntu/Debian
• Evolution of Artificial Intelligence Systems and Ensuring Trustworthiness

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:

• More Scans for SMS Gateways and APIs
• Attacks against Teltonika Networks SMS Gateways
• Apple Patches Exploited Vulnerability
• Exploit Attempts for Recent Langflow AI Vulnerability (CVE-2025-3248)
• New SSH Username Report

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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:

• Windows Defender Chrome Extension Detection
• Pi-Hole Pi4 Docker Deployment
• Are Local LLMs Useful in Incident Response?
• Zeek and Defender Endpoint
• IR Case/Alert Management

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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?