30/11/2023
🔍 The Anatomy of a Cyberattack
Each week, the security news features headlines detailing breaches affecting big-name corporations, creating an environment where often such headlines are anticipated and normalized.
Professionals must become accustomed to seeing news headlines with millions of customer records being breached, government and business entities encountering ransomware attacks, and organizations encountering downtime due to experiencing amplified network attacks.
Such cyberattacks are now approached from a "when" rather than "if" approach.
With new data breaches and cyberattacks being announced on a daily basis, one may wonder how it is that threat actors are able to cause such disruptive impacts.
Cyberattacks will consistently differ in scope, attack techniques, and impact, but do share a common attack approach.
Let's break down the anatomy of a cyberattack in this video👉👉👉 https://bit.ly/3Rk0AcT.
A cyberattack involves several stages, often following a sequence of steps known as the Cyber Kill Chain. (What is the "cyber kill chain?"👉👉👉https://bit.ly/47WiwzH) The Cyber Kill Chain provides a framework for understanding and analyzing the various steps an attacker will take to breach a target.
The different stages of the Cyber Kill Chain can be used to trace the anatomy of a successful cyberattack on an organization.
Cyberattack Breakdown
Stage 1: Reconnaissance
Reconnaissance involves learning about the target and gathering information about the organization. Information such as system vulnerabilities, employee details, network configurations, and potential entry points are useful for the threat actors to sketch and plan the attack.
Stage 2: Weaponization
In this phase, attackers create or obtain the tools necessary to exploit the identified vulnerabilities. These tools could be commodity malware, viruses, and leveraging public exploits on vulnerabilities. Or internal types of malicious software designed to exploit weaknesses in the target system.
Stage 3: Delivery
The weaponized payload is delivered to the target system or individual. This can be done through various methods such as phishing emails, conducting social engineering attacks, attacking or exploiting software vulnerabilities on systems exposed to the public internet, or using a zero-day vulnerability against an organization.
Stage 4: Exploitation
Once the payload is delivered, it exploits the vulnerabilities present in the system or network, allowing the attacker to gain unauthorized access to the network or control a user account.
Stage 5: Installation
The attacker installs the malware or establishes a foothold within the compromised system to gain persistence onto the network. This often involves creating backdoors or installing additional tools to maintain access. Skilled attackers will probe for and implant multiple backdoors on a compromised network in case access is closed.
Stage 6: Command & Control (C2)
The attacker establishes a connection from the compromised system back to attacker-controlled servers. This connection allows them to remotely execute commands, download malware, exfiltrate data, or perform further malicious activities.
Stage 7: Action on Objectives / Exfiltration / Defense Evasion
With compromised access to the network and elevated control of the system, the attacker proceeds to achieve their goals, which could include stealing sensitive information, disrupting services, deploying ransomware to blackmail victims, extracting trade secrets, proprietary information or any other malicious intent.
If the attacker's goal is data theft, they can extract the desired information from the compromised system. The stolen data is then sent back to the attacker's infrastructure or storage for further exploitation or used as extortion to make victims pay a ransom.
Finally, the attacker will likely want to evade detection and maintain access to the network for as long as possible. The attacker may attempt to erase logs, alter or disable security tools, masquerade their network traffic as legitimate requests, or manipulate timestamps to cover their tracks.
With stage 7 completed, the attackers (or threat group) successfully achieves their objectives.
The Cyber Kill Chain provides a resourceful framework and generalized reference for understanding the anatomy of a cyberattack.
Understanding each stage helps security professionals understand the attack lifecycle, enabling them to implement measures and defenses at different stages to detect, disrupt, or prevent attacks before they cause significant damage.
So the next time you read about a data breach or ransomware attack on an organization, think about the "anatomy" of the cyberattack and how you (as an aspiring or current security professional) can learn to implement defenses against each stage.
