#blueteam — Public Fediverse posts

Exploitation of PAN-OS GlobalProtect Authentication Bypass Vulnerability (CVE-2026-0257)

In this article, I break down how the vulnerability works, affected configurations, exploitation scenarios, and the mitigation steps organizations should take to protect their remote access infrastructure.

https://denizhalil.com/2026/06/02/cve-2026-0257-pan-os-globalprotect-authentication-bypass/

#CyberSecurity #PaloAlto #GlobalProtect #PANOS #CVE20260257 #VulnerabilityManagement #ThreatDetection #NetworkSecurity #BlueTeam #RedTeam #InfoSec #DenizHalil

What is Silver Ticket Attack: A Comprehensive Guide

In this article, I cover how Silver Ticket attacks work, common exploitation scenarios, detection techniques, and mitigation strategies.
https://denizhalil.com/2026/05/27/silver-ticket-attack-comprehensive-guide/

#CyberSecurity #ActiveDirectory #SilverTicket #Kerberos #CredentialAccess #RedTeam #BlueTeam #Pentesting #WindowsSecurity #InfoSec #ThreatDetection #DenizHalil

Kerbrute: Enumerating Active Directory Accounts

In this article, I cover how Kerberoasting works, common attack techniques, detection methods, and practical defense strategies.

🔗 https://denizhalil.com/2026/05/21/kerberoasting-attack-defense-guide/

#CyberSecurity #ActiveDirectory #Kerberoasting #Kerberos #CredentialAccess #RedTeam #BlueTeam #Pentesting #WindowsSecurity #InfoSec #ThreatDetection #DenizHalil

Basic Active Directory Enumeration: A Comprehensive Guide

In this article, I cover how Kerberoasting works, common attack techniques, detection methods, and practical defense strategies.
https://denizhalil.com/2025/05/05/basic-active-directory-enumeration-a-comprehensive-guide/

#CyberSecurity #ActiveDirectory #Kerberoasting #Kerberos #CredentialAccess #RedTeam #BlueTeam #Pentesting #WindowsSecurity #InfoSec #ThreatDetection #DenizHalil

What is Kerberoasting Attack – Kerberoasting: A Comprehensive Guide

In this article, I cover how Kerberoasting works, common attack techniques, detection methods, and practical defense strategies.
https://denizhalil.com/2026/05/21/kerberoasting-attack-defense-guide/

#CyberSecurity #ActiveDirectory #Kerberoasting #Kerberos #CredentialAccess #RedTeam #BlueTeam #Pentesting #WindowsSecurity #InfoSec #ThreatDetection #DenizHalil

Responder Tool for Network Credential Capture in Active Directory

In this article, I cover how Responder works, common credential capture techniques, and practical mitigation strategies for defending Active Directory environments.

https://denizhalil.com/2026/05/18/responder-tool-active-directory-credential-capture/

#CyberSecurity #ActiveDirectory #Responder #LLMNR #NTLM #CredentialCapture #RedTeam #BlueTeam #Pentesting #WindowsSecurity #InfoSec #EthicalHacking #DenizHalil

Linux Security Auditing with Lynis

In this article, I cover how to use Lynis for Linux security auditing, system hardening, and practical vulnerability assessment.

🔗 https://denizhalil.com/2025/03/17/linux-security-auditing-with-lynis/

#CyberSecurity #LinuxSecurity #Lynis #SecurityAuditing #SystemHardening #BlueTeam #DevSecOps #InfoSec #Linux #ITSecurity #SecurityEngineering #DenizHalil

Linux Security Auditing with Lynis

In this article, I cover how to use Lynis for Linux security auditing, system hardening, and practical vulnerability assessment.

https://denizhalil.com/2025/03/17/linux-security-auditing-with-lynis/

#CyberSecurity #LinuxSecurity #Lynis #SecurityAuditing #SystemHardening #BlueTeam #DevSecOps #InfoSec #Linux #ITSecurity #SecurityEngineering #DenizHalil

UDP Network Monitoring with C++: A Comprehensive Guide

In this guide, I demonstrate how to build a UDP packet sniffer in C++ using raw sockets, parse packet headers, and extract key data like source/destination IPs and ports.
https://denizhalil.com/2025/07/14/udp-network-monitoring-cpp-packet-sniffer/

#CyberSecurity #NetworkMonitoring #PacketSniffer #UDP #Cpp #NetworkSecurity #InfoSec #BlueTeam #RedTeam #InfoSec #securityengineering #denizhalil

Spoofing Packets with Scapy: A Comprehensive Guide

In this article, I cover how packet spoofing works with Scapy, practical use cases, and key security implications.
https://denizhalil.com/2025/07/22/spoofing-packets-with-scapy-a-comprehensive-guide/

#CyberSecurity #Scapy #PacketSpoofing #NetworkSecurity #Python #EthicalHacking #RedTeam #BlueTeam #Pentesting #InfoSec #SecurityEngineering #denizhalil

Cybersecurity Interview Questions and Answer Tips

In this article, I cover the most common cybersecurity interview questions and how to approach them effectively.

https://denizhalil.com/2025/12/08/cybersecurity-interview-questions-2025/

#CyberSecurity #InfoSec #CyberSecurityCareer #InterviewPrep #SOC #RedTeam #BlueTeam #ITSecurity #CareerDevelopment #EthicalHacking #SecurityEngineering #denizhalil

Mastering Linux Firewalls: A Deep Dive into Netfilter and iptables

In this article, I cover how iptables works, its architecture, and practical firewall configuration techniques.
https://denizhalil.com/2025/12/31/netfilter-iptables-firewall-configuration-guide/

#CyberSecurity #LinuxSecurity #iptables #Netfilter #NetworkSecurity #Firewall #InfoSec #BlueTeam #DevSecOps #securityengineering #ITSecurity #denizhalil

What are Pass-the-Hash and Pass-the-Ticket Attacks: A Comprehensive Guide

In this article, I cover how these attacks work, their differences, and how to detect and mitigate them.
https://denizhalil.com/2026/01/05/pass-the-hash-pass-the-ticket-attacks-guide/

#cybersecurity #ActiveDirectory #PassTheHash #PassTheTicket #credentialaccess #RedTeam #BlueTeam #Pentesting #InfoSec #WindowsSecurity #EthicalHacking #ITSecurity #denizhalil

What is NetBIOS and SMB Exploitation Techniques: A Practical Guide

In this article, I cover key exploitation techniques, real-world attack scenarios, and how to secure these services effectively.

https://denizhalil.com/2026/01/15/netbios-smb-exploitation-techniques-guide/

#CyberSecurity #SMB #NetBIOS #NetworkSecurity #ActiveDirectory #RedTeam #BlueTeam #Pentesting #InfoSec #WindowsSecurity #EthicalHacking #ITSecurity #DenizHalil

What is SNMP Security and Exploitation: A Comprehensive Guide

In this article, I cover how SNMP exploitation works, common vulnerabilities, and how to properly secure it.
https://denizhalil.com/2026/01/21/snmp-security-exploitation-guide

#CyberSecurity #SNMP #NetworkSecurity #InfoSec #InfrastructureSecurity #BlueTeam #RedTeam #Pentesting #ITSecurity #SecurityEngineering #DenizHalil

What is DCSync Attack and Mimikatz Usage in Active Directory

One of the most critical attacks in Active Directory environments, DCSync, allows attackers to impersonate a Domain Controller and extract password hashes through replication abuse.

#CyberSecurity #ActiveDirectory #DCSync #RedTeam #BlueTeam #InfoSec #Pentesting #SOC #ThreatDetection #WindowsSecurity #EthicalHacking #ITSecurity #NetworkSecurity #SecurityOperations #DenizHalil

https://denizhalil.com/2026/03/27/dcsync-attack-active-directory-guide/

🚨 CRITICAL zero-day in CrushFTP: attackers can take over servers, risking data theft & business disruption. No patch yet — restrict access, monitor logs, and stay alert for updates. Action needed for all CrushFTP users! https://radar.offseq.com/threat/hackers-exploit-crushftp-zero-day-to-take-over-ser-ff39bbd4 #OffSeq #CrushFTP #ZeroDay #BlueTeam

🚨 CRITICAL zero-day in CrushFTP: attackers can take over servers, risking data theft & business disruption. No patch yet — restrict access, monitor logs, and stay alert for updates. Action needed for all CrushFTP users! https://radar.offseq.com/threat/hackers-exploit-crushftp-zero-day-to-take-over-ser-ff39bbd4 #OffSeq #CrushFTP #ZeroDay #BlueTeam

🚨 CRITICAL zero-day in CrushFTP: attackers can take over servers, risking data theft & business disruption. No patch yet — restrict access, monitor logs, and stay alert for updates. Action needed for all CrushFTP users! https://radar.offseq.com/threat/hackers-exploit-crushftp-zero-day-to-take-over-ser-ff39bbd4 #OffSeq #CrushFTP #ZeroDay #BlueTeam

C'est le Jour P pour la 1ere édition de POLAR Conference présenté par CrowdStrike, conférence pour CISO, directeurs et gestionnaires en cybersécurité!

It's P Day for the first edition for POLAR Conference presented by CrowdStrike, our conference for CISO, directors and managers in cybersecurity!

#polar #polar2023 #polarconference #infosec #ciso #cisolife #cisoadvisor #cisoseries #cybersecurite #cybersecurity #canada #quebec #conference #cybersecuritymanagement #hacking #redteam #blueteam #management #summit #securityindustry #polar2023 #polarqc #fic #incyber #cisosummit #inforum #startup #vitrinestartup

Good morning all and #happywednesday! I stumbled across this article by Secureworks which does a fantastic job at gathering artifacts the appear to better understand the #SharpHound collector that helps #BloodHound gather information. This is a great article with the trail of artifacts that come from the network and the host. This type of article always takes me back to where I started which is when I stumbled across the 'Tool Analysis Result Sheet' from the JPCERT/CC. Both are great resources and I hope you enjoy them as much as I did! Have a wonderful day and Happy Hunting!

Sniffing Out SharpHound on its Hunt for Domain Admin
https://www.secureworks.com/blog/sniffing-out-sharphound-on-its-hunt-for-domain-admin

Tool Analysis Result Sheet
https://www.jpcert.or.jp/english/

#CyberSecurity #ITSecurity #InfoSec #BlueTeam #ThreatIntel #ThreatHunting #ThreatDetection #HappyHunting #readoftheday

It's been a heck of a week, with tonnes of great research and tooling that I'm sure you're going to get a kick out of - check out our wrap-up for all the news!:

https://opalsec.substack.com/p/soc-goulash-weekend-wrap-up-16042023

Kaspersky researchers shone a light on the Dark Web trade in Google Play Loaders - a service to help inject malware into legitimate, and supposedly vetted apps, with guarantees of >1 week up-time and the option to boost your spread with targeted Ads.

#Nokoyawa ransomware have clearly got some talent on their team, having abused a #CLFS 0-day prior to Microsoft patching it last week - one of 5 different exploits they've used, mind you - and they appear to have a new, distinct ransomware strain in rotation, too.

There's heaps more great threat reporting, including a report that #FIN7 and former #Conti (#FIN12/#WizardSpider) members are collaborating on a new backdoor, and a crypto-mining campaign that may be the canary in the coal mine, indicating broader uptake of BYOVD and IPFS by low-level operators.

The #QueueJumper vulnerability from last week looks primed to explode in coming days, with a no-fix vulnerability in Microsoft Intune capping off a lousy week for Windows admins struggling to keep their networks secure.

TOOLING. Ooooh boy, this was a good week for tooling and tradecraft, ladies and gentlemen.

The #redteam have a new port of the SharpHound AD enumeration tool for Cobalt Strike; a great reference piece on leveraging stolen Office tokens to bypass MFA and access cloud workloads, and a list of keywords to avoid when crafting stealthy PowerShell scripts.

The #blueteam have a script to help tweak VM settings to circumvent malware anti-analysis checks; Procmon for macOS, and a lightweight bastion host to help redirect and record traffic sent to honeypots in your network.

This was a fun one to write up, with heaps of interesting reads and takeaways to be had. Get amongst it!

https://opalsec.substack.com/p/soc-goulash-weekend-wrap-up-16042023

#infosec #cyber #news #cybernews #infosec #infosecnews #informationsecurity #cybersecurity #hacking #security #technology #hacker #vulnerability #vulnerabilities #malware #ransomware #dfir #soc #threatintel #threatintelligence #darkweb #microsoft #azure #mfa #mfabypass #cobaltstrike #bloodhound #sharphound #byovd #ipfs #intune #GooglePlay #Android #zeroday #0day

A rich #training #offer at BSides Milano we have top-notch trainings, in some case for the first time in #Italy! All #in-person! The #event will be held from 4 to 8 July 2023. From 4 to 7 we will be focus on #learnitall on the 8 we will deep dive in our #amazing #conference. Ticket will be available from tonight for the trainings. We have an early bird rate until 30th April.
Are you ready? We are!! join our group SecurityBsidesItalia #linkedin or on #discord https://lnkd.in/dBu7wkJG for detailed info! #cyber #threatintelligence #threatintel #cloud #redteaming #redteam #blueteam #threathunting #exploitation #secureboot #TTE #multicloud #hybridcloud #voip #Linux #Windows #LTE #baseband #deception #detection #evasion #edr #BSML23 #AWS #Azure #AzureAD #GCP #devops #cicd #RTOS #FalseFlag #HoneyNet #IDAPro #Python #reverseengineering #Ghidra #network #MITRE #TTPs #persistence #commandandcontrol #lateralmovement #osint #obfuscation #malware #malwareanalysis .
Reserve your your spot!! https://lnkd.in/dZf-yyPv