Cybersecurity intelligence for defenders

Practical cyber defense for modern security teams.

CyberOpsHub is a professional cybersecurity knowledge hub focused on SOC operations, SIEM engineering, threat intelligence, vulnerability management, incident response, and practical security guidance.

Built for hands-on defenders.

Clear operational content for people who secure networks, investigate alerts, manage cyber risk, and build detection capabilities.

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SOC & Incident Response

Alert triage, investigation workflows, phishing response, endpoint analysis, and incident handling procedures.

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SIEM & Detection Engineering

Practical guides for Wazuh, log parsing, custom rules, dashboards, detection logic, and security monitoring.

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Threat Intelligence

IOC handling, MISP workflows, enrichment, feed validation, and how to turn intelligence into actionable defense.

Latest articles.

Newest cyber news, technical explainers, and practical how-to guides.

Cyber News

Hackers breach govt webmail while running parallel crypto fraud

The Jewelbug hacker group has been carrying out espionage operations targeting governments and militaries while also engaging in cryptocurrency fraud. [...]

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Cyber News

Microsoft patches LegacyHive Windows zero-day vulnerability

Microsoft has released security patches to address a Windows zero-day vulnerability known as "LegacyHive," disclosed after the July 2026 Patch Tuesday. [...]

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Cyber News

Critical VMware vCenter RCE flaw exploited for reverse SSH access

A recently patched critical vulnerability (CVE-2026-59310) in VMware vCenter Syslog Server is being exploited in an active campaign to deploy a reverse SSH tool for persistence and remote access. [...]

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Cyber News

Attackers Exploit SharePoint Authentication Bypass After Public PoC Release

Threat actors have begun to exploit a newly disclosed Microsoft SharePoint vulnerability following the release of a proof-of-concept (PoC) code. The vulnerability in question is CVE-2026-55040 (CVSS score: 9.1), which refers to a critical security feature bypass that stems from weak authentication. It was patched by Microsoft as part of its July 2026 Patch Tuesday updates. "The authentication

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Cyber News

Adobe Commerce Bug Targeted Immediately After Disclosure

The first exploitation attempts targeting CVE-2026-71362 were observed shortly after Adobe released patches. The post Adobe Commerce Bug Targeted Immediately After Disclosure appeared first on SecurityWeek.

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Cyber News

Belgium's eID Authentication Opens Citizen Accounts to RCE

The trust framework underlying Belgium's electronic ID system was fully compromised by severe vulnerabilities in a key browser extension, showcasing bigger problems with extensions in general.

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Cyber News

Lazarus Exploits Windows Zero-Day to Gain SYSTEM Access and Deploy Backdoor

The North Korean threat actor known as Lazarus Group has been attributed to the zero-day exploitation of a newly patched security flaw impacting Microsoft Windows to deliver a never-before-seen backdoor targeting defense and aerospace companies across France, Germany, Brazil, and India. The activity, per Check Point Research, is part of Operation Dream Job, a long-running cyber espionage and

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Cyber News

737 Chrome VPN Extensions Caught Routing Traffic Through Proxies. Check If You Have One

A massive set of 737 free VPN and proxy extensions have been found to mainly target Russian-speaking users seeking access to blocked services with an aim to intercept browser traffic and route them through a proxy infrastructure. The extensions, published across at least 40 Chrome Web Store developer accounts, racked up 75,486 installs. Of those identified, 274 have been found to impersonate 66

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Cyber News

OpenAI, Anthropic, Google API Flaw Let Weaker AI Models Decode Stronger Models' Reasoning

A newly disclosed flaw in the way OpenAI, Anthropic, and Google carried hidden AI reasoning between API calls let researchers recover internal reasoning and secrets from session logs, including API keys and passwords. The weakness affected encrypted reasoning objects used by the providers' reasoning APIs, where a block created in one session could be replayed into another and, during testing,

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Cyber News

Microsoft Plugs Nearly 400 Security Holes

Microsoft today released updates to remedy at least 398 security vulnerabilities in its Windows operating systems and supported software, including one weakness that is already being actively exploited and two others that were publicly detailed prior to today.

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Cyber News

Canadian Man Pleads Guilty in Snowflake Extortions

A 26-year-old Canadian man once described as one of the most consequential cybercrime threat actors of 2024 has pleaded guilty to computer fraud and conspiracy to hack and extort more than 165 organizations that used the cloud data storage provider Snowflake. Connor Riley Moucka, of Kitchener, Ontario, also admitted to stealing call and text history records of more than 100 million AT&T customers.

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Cyber News

New DOUBLECUP ClickFix service hides malware in browser cache images

A new Russian loader-as-a-service named DOUBLECUP uses ClickFix attacks to hide malicious code in PNG images cached by victims' browsers, ultimately delivering CountLoader to Windows and macOS devices and a new remote access trojan named DeviceManager to Windows systems. [...]

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Resources.

Downloadable checklists, templates, scripts, and technical guides.

SOC Checklists

Phishing investigation, brute-force analysis, malware alert triage, and suspicious login review.

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Security Scripts

PowerShell, Python, Bash, and API examples for common security operations tasks.

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Policy Templates

Vendor security, acceptable use, access management, AI usage, and incident response documents.

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Ransomware Incident Response Playbook

A complete phase-by-phase response playbook for ransomware incidents — from detection and containment through recovery and post-incident review.

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Phishing Incident Response Playbook

Step-by-step response for phishing reports — triage, containment, investigation, and recovery including credential compromise handling.

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Data Breach Incident Response Playbook

Structured response for confirmed or suspected data breaches, including legal and regulatory notification guidance for GDPR, HIPAA, and CCPA.

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SOC Alert Triage Playbook

The standard SOC process for triaging security alerts — 5-step methodology, disposition framework, severity scoring, and SLA targets for L1/L2 analysts.

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Threat Hunting Playbook — SOC Edition

A practical threat hunting playbook covering hypothesis building, data sources, SIEM query examples, MITRE ATT&CK hunt hypotheses, and documentation templates.

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Endpoint Analysis & Incident Handling Procedures for IOC IP Connection Detection

This playbook provides operational guidance for detecting, triaging, investigating, containing, and remediating endpoint communications involving known malicious or suspicious IP addresses (Indicators of Compromise — IOC IPs).

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