What Is a Lateral Movement?
Lateral movement refers to the techniques attackers use to move deeper into a network after gaining initial access. Once inside an environment, threat actors navigate from system to system, seeking sensitive data, elevated privileges, and high-value assets while attempting to remain undetected. This progression distinguishes sophisticated cyberattacks from simple, isolated breaches and represents one of the most dangerous phases of a security incident.
After compromising an initial entry point, attackers rarely stop at that single machine. The initial foothold might be a low-value endpoint accessed through a phishing email or an unpatched vulnerability.
However, the real target often lies elsewhere in the network: domain controllers, file servers containing intellectual property, financial systems, or databases holding customer information. Lateral movement allows attackers to traverse the environment systematically until they reach these objectives.
Why Lateral Movement Is Difficult to Detect
The challenge with lateral movement lies in its ability to blend into normal network activity. When attackers gain legitimate credentials or administrative privileges, their actions can appear indistinguishable from standard operations. IT administrators regularly access multiple systems, run scripts across servers, and transfer files between machines. Threat actors exploit this reality by using the same tools and techniques that legitimate users employ every day.
Built-in system utilities become weapons in the hands of skilled attackers. Remote Desktop Protocol, PowerShell, Windows Management Instrumentation, and similar tools serve legitimate administrative purposes but can also enable malicious activity. When an attacker uses stolen credentials to remotely access another machine, security teams face the difficult task of distinguishing between authorized administration and unauthorized intrusion.
According to the 2025 Arctic Wolf Security Operations Report, 72% of active response actions taken during security investigations were identity-based, such as disabling compromised accounts or enforcing password resets. This statistic underscores how frequently attackers leverage stolen credentials to achieve their objectives. The prominence of identity-based threats highlights why detecting lateral movement requires more than simply monitoring for malware. Organizations need visibility into authentication patterns, privilege usage, and behavioral anomalies across their entire environment.
The difficulty increases when attackers spend time inside a network before taking destructive action. During this dwell time, threat actors quietly explore the environment, mapping network architecture and identifying valuable targets. As noted in the Arctic Wolf 2025 Security Operations Report, some recent ransomware campaigns progressed from initial access to system encryption in under 90 minutes, creating an extremely narrow window for detection and response.
What Are the Stages of Lateral Movement?
Lateral movement typically unfolds across three interconnected phases: reconnaissance, credential gathering, and accessing additional systems. Understanding these stages helps organizations recognize attack patterns and implement appropriate defenses.
Reconnaissance
During reconnaissance, attackers observe and map the compromised environment. They identify other devices on the network, determine which operating systems are running, locate domain controllers, and discover shared resources. Tools help them understand naming conventions, network hierarchies, and security controls in place. This intelligence gathering informs their next moves and helps them avoid detection while identifying the most valuable targets.
Credential Gathering
The credential gathering phase focuses on obtaining authentication information that enables broader access. Attackers may extract password hashes from memory, capture credentials as users log in, or exploit trust relationships between systems. They search for plaintext passwords in configuration files, scripts, or documentation. Some deploy keyloggers to capture credentials as employees type them. Others exploit Kerberos ticket-granting services to request access tickets for additional resources.
Expanding Access
With stolen credentials and elevated privileges in hand, attackers move to accessing additional systems. They authenticate to other machines using compromised accounts, often impersonating legitimate users or administrators. This progression continues as they hop from system to system, escalating privileges and expanding their foothold until reaching their ultimate targets.
What Are Common Lateral Movement Techniques?
Attackers employ numerous methods to move laterally through compromised environments. Understanding these techniques helps security teams recognize suspicious activity and implement effective countermeasures.
Pass-the-Hash
Pass-the-hash attacks involve using captured password hashes to authenticate without knowing the actual plaintext password. Windows systems historically allowed authentication using just the hash, enabling attackers to move between machines without cracking passwords. While mitigations exist, this technique remains effective in environments with weak security configurations.
Remote Access Protocols
Remote access protocols provide convenient avenues for lateral movement. Attackers abuse Remote Desktop Protocol, SSH, and virtual private network connections to access other systems. When these services are inadequately secured or authenticated with compromised credentials, they become highways for threat actor movement.
Exploiting Trust Relationships
Exploiting trust relationships between systems offers another path. Organizations often configure certain machines to trust connections from specific other machines, reducing authentication friction for administrators. Attackers exploit these trust relationships to move laterally without repeatedly authenticating.
According to the 2025 Arctic Wolf Threat Report, intrusions accounted for 24% of incident response cases. These incidents often involved attackers establishing initial access through external exposure of remote access tools, then using various lateral movement techniques to expand their presence before being detected and contained.
The Speed Problem
The timeline for lateral movement has compressed dramatically. Breakout time, which measures how quickly attackers move from initial compromise to accessing additional systems, has decreased to the point where organizations have only minutes or hours to detect and respond before significant damage occurs.
This acceleration creates enormous pressure on security operations. Organizations must detect suspicious activity, investigate potential threats, and initiate containment measures faster than attackers can expand their foothold. The traditional approach of investigating alerts during business hours and responding within days no longer suffices against adversaries who operate around the clock and move with purpose.
Effective defense requires continuous monitoring that correlates activities across multiple systems. When a user account authenticates from an unusual location, accesses systems it normally never touches, or performs actions inconsistent with that user’s typical behavior, security teams need immediate visibility and the ability to act quickly.
Building Defenses Against Lateral Movement
Preventing and detecting lateral movement requires multiple layers of defense working together. No single control provides complete protection, but a combination of technical measures and operational capabilities can significantly reduce risk.
Comprehensive Visibility
Organizations need comprehensive visibility across their entire environment. This means collecting and analyzing authentication logs, network traffic, endpoint activity, and cloud infrastructure events. The goal is creating a complete picture of what normal activity looks like so that anomalies stand out. When an account starts accessing systems it has never touched before, or when authentication patterns change suddenly, these signals warrant investigation.
Credential Protection
Credential protection represents a critical defense. Implementing strong, phishing-resistant multi-factor authentication makes stolen passwords less useful to attackers. Regular credential hygiene, including password changes after potential compromises and monitoring dark web sources for leaked credentials, reduces exposure. Principle of least privilege limits the damage attackers can cause even if they compromise an account.
Network Segmentation
Network segmentation constrains lateral movement by creating boundaries between different parts of the environment. When systems in one segment cannot freely communicate with systems in another segment, attackers face additional obstacles as they attempt to progress toward their objectives. Properly configured segmentation combined with monitoring of cross-segment traffic helps detect lateral movement attempts.
Behavioral Analysis
Behavioral analysis enables detection of suspicious activity that might otherwise appear legitimate. When security operations monitor for unusual patterns such as administrators accessing systems outside their normal responsibilities, accounts authenticating from impossible locations, or unusual file access patterns, they can identify potential lateral movement in progress.
The Importance of Human Expertise and Rapid Response
Technology alone cannot stop lateral movement. While automated tools help collect data and generate alerts, human expertise remains essential for recognizing attack patterns, understanding context, and making response decisions.
According to the Arctic Wolf Security Operations Report, the platform analyzed approximately 330 trillion observations over 12 months, resulting in about 9,000 security investigations. This massive reduction in noise, achieving nearly 99.99999999% filtering, demonstrates the value of combining advanced technology with expert analysis.
Expert security operations provide 24×7 coverage to match the reality that attackers operate continuously. They bring pattern recognition developed through investigating thousands of incidents across many organizations. They understand how attackers think and can anticipate next moves. Most importantly, they can act quickly when lateral movement is detected, containing threats before they escalate.
Speed matters enormously. When security teams detect lateral movement and immediately disable compromised credentials, isolate affected systems, and block attacker access to additional resources, they disrupt attack progression. This rapid response transforms what might have been a major breach into a contained incident with limited impact.
How Arctic Wolf Helps
Arctic Wolf delivers comprehensive visibility, expert analysis, and rapid response needed to detect and stop lateral movement. The Aurora™ platform ingests telemetry from endpoints, networks, cloud environments, and identity systems, enabling correlation across disparate sources to reveal lateral movement patterns.
Our Security Operations Center provides 24×7 threat hunting and investigation, with analysts who validate threats and initiate rapid response when suspicious activity is detected. This combination of advanced technology and expert analysis enables quick identification of lateral movement attempts and response before attackers achieve their objectives, helping organizations end cyber risk through effective security operations that protect what matters most.
