Cybersecurity Knowledge Hub

Account takeover is a type of fraud in which a cybercriminal gains unauthorized access to a victim's online account.

The term APT refers to an advanced persistent threat or an attack group. This, however, is not just a single attack, but a set of attacks over a period of time. The nature of these attacks is stretched, and they’re conducted in multiple phases due to the fact that the attackers use sophisticated tactics and means of hiding their activities.

Read about how iGaming affiliate fraud operates, what malicious signs to watch out for, and how to prevent it with Group-IB Fraud Protection

In this article, we discuss a tool called antidetect browser, which is designed to bypass browser fingerprinting. We’ll explore the techniques used by antidetect browsers, examine both their legitimate use cases and how cybercriminals exploit them for fraud as well as how organizations can fight against the illegal use of antidetect browsers.

Explore what API security means for your business, emerging threats, and actionable strategies to protect digital assets from API-related cyberattacks.

Explore Attack Surface Management: definition, importance, and strategies. Protect your organization's assets with Group-IB ASM.

Authorized Push Payment (APP) fraud has evolved into a global cybercrime epidemic, with individuals and businesses losing billions each year to convincing social engineering attacks. This article delves into how fraudsters manipulate victims into willingly transferring funds.

Discover the importance of a Blue Team for your business's cybersecurity. Learn about assessing cyber risks, methodologies, exercises, tools, and building a strong defense.

Uncover Bonus Abuse Fraud: Understand how it operates, common tactics, prevention tips, and how Group-IB offers assistance.

The digital world is becoming more and more interconnected. It creates a better experience for individuals and businesses while accessing and sharing information. However, this growing interconnectivity also opens the door to increasingly sophisticated cyber threats. Among these, botnet attacks stand out as one of the most dangerous and far-reaching.

A data breach is a security incident that compromises computer data, systems, applications, and devices and exposes sensitive, confidential, or protected information without the authorization of the organization.

Email is the most conventional and a prime channel of communication for both internal and external exchange of information in any organization. This, unequivocally, also makes it the no.1 attack vector, and a favorable means for adversaries to access your network.

In cybersecurity, a card shop is a type of underground market that sells specific types of data – dumps and bank card credentials (СС). Card credentials are data in text format that may include card number, card expiration date, cardholder name, address, and CVV. Dumps stand for the contents of the magnetic strip of bank cards. 

Implement a robust cloud data security program with Group-IB to identify hidden vulnerabilities and safeguard sensitive data from cyber threats in cloud environments.

Protect against cloud jacking: definition, main attack vectors, and defense solutions

In cybersecurity, CERT stands for computer emergency response team - a team of information security analysts tasked with cyber incident detection, response, prevention, and reporting.

The term CIRC stands for computer incident response center or capability.

Discover CIRT's role, differences from CERT, CIRC, SOC, and the value of third-party providers in incident response. Your go-to guide.

CSIRC or the Computer Security Incident Response Center is a specialized department responsible for managing and reacting quickly and efficiently to information security incidents within an organization.

Shield your business from Credential Stuffing: Learn what it is, prevention, and how Group-IB can help safeguard your data.

Learn about credit card fraud and ways to protect yourself.

Learn all about crypto wallet drainers - malicious tools that steal digital assets from unsuspecting users and how to protect your cryptocurrency.

Learn what cybercrime is, its impact on society, and how to protect your business. ✓ Explore proactive tips and solutions to keep your business safe.

Demystifying the Dark Web: Types of cybercrimes, access, and safeguarding your business with Group-IB's protection.

A data lake is a centralized repository that allows you to store all your structured and unstructured data at scale.

Understand data leaks' risks and prevention. Explore types, impacts, and monitoring solutions with Group-IB.

Learn how data loss prevention (DLP) works, why it’s essential, the various types of DLP security, and features to look for.

Data poisoning is when attackers slip misleading or malicious samples into AI training data so models learn the wrong lessons. The fallout ranges from subtle bias to backdoored behavior triggered by specific cues.

A Dedicated Leak Site (DLS) is a website where the illicitly retrieved data of companies, that refuse to pay the ransom, are published.

The deep web, also called the invisible web, is a part of the internet that is not indexed and therefore cannot be accessed through traditional web browsers such as Google, Bing, or Yahoo.

Discover the inner workings of deepfakes, from face swaps to voice attacks, and learn how to spot deep fakes before they can cause any harm.

Explore Digital Forensics: components, tools, and discover Group-IB's digital forensics services.

Unlocking Digital Forensics and Incident Response: Its scope, importance, choosing providers, and DFIR expertise with Group-IB.

Learn more about the dangers of DDoS and discover existing options to defend your digital resources from being flooded by attackers

Learn what a DNS server is and how it works. Explore the best DNS servers, public DNS options, and a step-by-step guide to optimize your internet speed and security.

Explore eDiscovery: Definition, process, and use cases. Learn about DFIR integration, presenting evidence, and Group-IB's eDiscovery services.

Encryption converts readable data into an unreadable code, unless you possess the key. This guide covers how it works, its various types, and why it serves as the backbone of digital trust.

The endpoint detection and response definition boils down to the following: EDR is a class of cybersecurity solutions for detection and analysis of malicious activity on endpoints, e.g., workstations, servers, and so on.

Understand what fraud protection means for your business and how it prevents financial losses while maintaining customer trust.

Discover Google dorking, its powerful search commands, and real-world examples. Learn how hackers use Google dorks, legal considerations, and how to protect sensitive data.

Hacktivism (a combination of the terms “hacking” and “activism”) – hacker activity performed with political or social purposes, such as drawing attention to conflict or promoting specific ideas. Unlike regular cybercriminals, hacktivists do not seek financial gain or other personal gain.

Human Intelligence (HUMINT) zeroes in on people, the conversations, cues, and context that malware can’t confess. It turns whispers into leads, intent into attribution, and raw tips into action.

Mastering Identity and access management: System, components, importance, and optimizing IAM with Group-IB for your organization.

Discover integrating Identity Providers & XDR for robust cloud security. Simplify access, fortify authentication, and detect threats proactively!

Secure your business with Group-IB's IAM solutions. From passwordless access to expert consulting, fortify defenses against cyber threats. Align identity security with your business goals effectively.

Impersonation scams exploit urgency and trust with spoofed brands, fake support agents, and even AI-cloned voices. This guide highlights the telltale signs (look-alike domains, payment detours, odd verification asks) and offers quick verification steps you can use in seconds.

Incident response is a complex multi-step process of identifying, localizing, and eliminating cybersecurity incidents.

Indicators of Attack flag intent in motion like suspicious child processes, rogue admin tools, odd DNS beacons, and stealthy persistence. This guide breaks down IOAs vs. IOCs, shows real examples mapped to MITRE ATT&CK, and outlines fast detection steps.

Decoding Indicators of Compromise: Types, prevention, IOCs vs. IOAs, risk assessment, and managing IOCs with Group-IB.

Learn how impersonation fraud threatens insurance companies and how to protect your customers.

Intrusion detection and prevention systems (IDS/IPS) are security systems designed to detect and protect against unauthorized access to companies’ infrastructure.

Learn about Indicators of Compromise (IoCs) in cybersecurity. Discover how IoCs help detect malware, data breaches, and cyber threats to protect your organization.

Discover how IPsec secures data at the network layer and how to deploy it effectively in your cybersecurity strategy.

Explore the differences and similarities between IT vs. OT in cybersecurity. Learn about their convergence, and the resulting benefits and implications of it.

Keyloggers are one of the stealthiest tools in a cybercriminal’s arsenal, sneakily recording every letter you type, from passwords to private chats. Often bundled into malware, these digital eavesdroppers are used in credential theft, corporate espionage, and even targeted surveillance.

Learn the key differences between Docker and Kubernetes, how they work together, and which technology suits your deployment requirements.

Lateral movement in cybersecurity refers to attackers' techniques after an initial foothold to pivot across a victim’s internal network, harvesting credentials and escalating privileges until they reach high-value systems such as domain controllers or sensitive databases.

Least Privilege is a security principle that gives users, applications, and systems only the minimum access rights, permissions, data, or functionality needed to perform their specific tasks.

Malware or malicious software is a blanket term for code, or scripts, created to disrupt the functioning of a system.

Malware detonation platform is an essential tool for malware analysis.

Unveiling the power of Managed Detection and Response: MDR vs. MSSP, critical process steps, provider benefits, and experiencing MDR with Group-IB.

The term managed IT services stands for the practice of delegating a part of the typical functions of an IT department to a third party – a managed service provider (MSP).

Elevate Cybersecurity with Multi-Factor Authentication: Learn what it is, its importance, users, protection, and secure access with Group-IB Fraud Protection.

Network detection and response (NDR) is a class of solutions dedicated to monitoring and analyzing network traffic for malicious and suspicious activities and responding in case of detected cyber threats in the network.

Network segmentation is the practice of dividing a computer network into smaller, isolated segments to improve security, performance, and control.

Network traffic analysis (NTA) is a method of monitoring network traffic for the purpose of identifying malicious activity or other issues with the network caused by application bottlenecks, connectivity issues, and so on.

Explore Nmap, the top network scanning tool for cybersecurity. Detect vulnerabilities, map networks, and enhance security with powerful scanning features.

Explore OSINT, its role in cybersecurity, and key OSINT techniques. Learn how the OSINT framework helps gather intelligence, detect threats, and enhance cyber defense.

Explore Overlay Attacks: Learn the risks, Android overlays, techniques, protection, and Group-IB's solutions to safeguard your data.

Learn the different types of brute force attacks, common tools, and how Group-IB protects against account takeover.

Pass the hash is an attack method that allows cybercriminals to use a password hash instead of the password itself to access resources within the network.

Combolists are bulk sets of stolen logins from stealer logs, ULP files, and old leaks, fueling credential stuffing in 2025. Learn sources, risks, and how to fight back.

Unlocking Password Spraying Attacks: Learn the differences, impacts, detection, prevention, and Group-IB's protective solutions.

Understand passwordless authentication: methods, benefits, and strategies to secure enterprise systems and prevent credential attacks.

Unpatched software is an open door. Discover how to optimize your patch management process, eliminating vulnerabilities and safeguarding your business against cyber threats.

A penetration test (or pentest) is an imitation of a cyberattack against a system in order to identify weaknesses that threat actors could use to their advantage.

Learn what qualifies as PII, why it matters to your organization, and get practical steps to secure sensitive data, reduce breach risk, and stay compliant.

Phishing is a form of social engineering that implies tricking victims into disclosing sensitive data, such as payment card credentials, logins and passwords for specific accounts, password phrases for crypto wallets, etc.

Explore the Point-to-Point Tunneling Protocol's legacy, examine its critical security vulnerabilities, and discover why organizations must migrate to modern VPN alternatives.

Learn how port 3389 enables secure Remote Desktop Protocol (RDP) access. Discover its functions, security risks, and 8 best practices for maximizing protection.

Prompt injection attacks in LLMs smuggle hidden instructions into prompts or content the model reads. The result can be policy bypass, data leakage, or unintended tool actions.

A proxy server is an intermediary computer that sits between a user’s device and the wider internet. When you send a web request, it first goes to the proxy; the proxy then forwards that request to the destination server, receives the response, and passes it back to you.

Purple team is a term for a blend of a red team and blue team. In contrast to the red teaming approach, purple teaming implies the collaborative work of “attackers” and “defenders”.

Learn the meaning of Quality of Service (QoS) in networking, its role in managing bandwidth, reducing latency, and ensuring reliable data transmission.

RaaS is a business model where individuals (operators) develop and distribute the malware, and pay the third parties for traffic generation and malware downloads to victim machines.

Ransomware attacks are one of the most-persistent global cyber threats, and are becomming even more sophisticated with each year.

Learn the differences between Red Team and Blue Team in cybersecurity. Discover their roles, strategies, and how they work together to strengthen security.

Red teaming involves simulating a cyberattack in order to comprehensively assess what the customer company’s security specialists do and to examine the processes and technologies used for protecting the company’s IT infrastructure.

Protect your system from Remote Access Trojans (RATs). Learn how RATs work, common symptoms, and security practices to defend against these cyber threats.

Continuously monitor and secure your SaaS apps with SSPM. Detect misconfigurations, reduce risk, and ensure compliance in real time.

A sandbox in cybersecurity is an isolated environment for detecting and analyzing malicious payloads.

Sandbox evasion techniques are being built by cybercriminals to bypass modern malware analysis tools. 

A scam is a deceptive business aimed at stealing money or other valuable goods from unsuspecting victims.

Learn how SD-WAN intelligently routes traffic to boost performance and decide which deployment you need.

Secure Access Service Edge (SASE) is a cloud-based network security architecture that converges wide-area networking with security functions into a single service, delivering secure connectivity for any user, anywhere, on any device.

Secure software development lifecycle (SSDLc) is a software development lifecycle (SDLc) concept with a focus on building a secure product.

Security Information and Event Management (SIEM) is a crucial part of any security system, as it connects and unifies the data contained in existing systems.

Learn about setting up a Security Operations Center (SOC). Explore core functions, SIEM benefits, building a SOC, and enhancing it with Group-IB MXDR and TI.

Security theater creates a false sense of safety without real protection. Learn how to spot ineffective security measures and focus on real cybersecurity solutions.

Learn how session hijacking works, its cybersecurity risks, and how to prevent it with strong session control measures.

Guarding Against Session-Based Fraud: Learn about common types, detection, prevention, and Group-IB's solutions.

Learn about Shadow IT, its risks, and how to manage it effectively. Explore real-world examples and discover Group-IB's Attack Surface Management solution.

Unauthorized SIM swapping occurs when a fraudster manipulates the mobile service provider to hijack a victim’s phone number.

Learn how SMS-based phishing attacks work, common indicators, and strategies to defend against smishing. 

Defend Against SMS Bombing: Learn about the risks, motives, and protection methods. Discover Group-IB's solutions. Stay secure!

The social engineering definition boils down to various psychology-based techniques used to persuade people to disclose certain information or perform a specific action for malicious purposes.

Learn what spear phishing is, how it works, and strategies to protect your enterprise from these targeted attacks.

Being aware of tailgating attack methods and impacts is crucial in protecting your organization. Discover 9 effective ways to help mitigate tailgating attacks.

Learn how threat hunting helps to proactively identify evasive cyber threats and strengthen your defenses against emerging risks.

Make your SOC smarter. Learn how threat intelligence helps you prioritize what matters, block active campaigns, and reduce time-to-contain.

Explore the different types of threat intelligence feeds and the best ways to integrate them into your security systems to reduce false positives and speed up response.

A threat intelligence platform (TIP), also known as a cyber threat intelligence platform, is a technology solution for gathering, combining, and organizing threat intelligence from various sources.

Underground Cloud of Logs (UCL) is a special service that provides access to compromised confidential information, mostly obtained by stealer malware.

Underground markets are automated platforms for selling any type of data. These markets offer all kinds of compromised data.

Understand the core components of a VPN, compare different VPN types, and learn how Group-IB’s Managed XDR strengthens your organization’s network security by detecting threats hidden in encrypted VPN traffic.

Vishing, commonly known as voice phishing, is a type of scam where cybercriminals trick users into sharing their personal information to conduct secondary attacks.

VULINT, short for Vulnerability Intelligence, is a specialized branch of threat intelligence focused on finding, analyzing, and understanding software and system vulnerabilities.

Learn the essentials of Vulnerability Management: importance, documentation, implementation, and its connection with threat intelligence.

Explore the world of web injection attacks and their impact on businesses. Learn about attack types, detection methods, prevention strategies, and discover how Group-IB's solutions offer robust protection against web injections.

A web shell is a piece of code, when executed on a web server, gives access to its file system and/or terminal, with the ability to execute commands remotely.

Learn what’s website defacement, how it can potentially harm your reputation, and explore key measures to undertake as a defense

Want to learn more about whaling attack phishing? Discover how to recognize whaling in cybersecurity, 7 ways to protect your company against it, and more.

Explore the role of a White Team in red teaming and understand its key responsibilities. Learn about white, red, and blue teams, and the difference from purple teams in cybersecurity.

Discover Extended Detection and Response (XDR) technology. Learn how it works, enhances security, and stay ahead with Group-IB MXDR.

A zero-day exploit is a piece of code or technique that exploits a software vulnerability unknown to the vendor since there are “zero days” of warning; no patch or fix exists, making it a powerful tool in the hands of attackers.

Zero Trust, in its literal sense, assumes that all networks, devices, and user activity are a threat unless the possibility is ruled out.