Most descriptions of SOC analyst work go something like this: monitor alerts, investigate suspicious activity, escalate when necessary, document your findings. It is accurate in the same way that saying a chef cooks food is accurate. It tells you what happens without telling you anything about how it actually feels to do it.
If you are preparing for a SOC role, or just trying to understand what blue team work really involves, this is the guide that fills that gap. It walks through a real alert investigation from the moment something lands in the queue to the moment it is closed or handed up, using the same workflow and tools that analysts use every day.
What a SOC Actually Does
A Security Operations Centre is the function within an organisation responsible for monitoring its systems, detecting threats, and responding to incidents. Analysts working in a SOC spend most of their time watching for signals that something is wrong, investigating those signals, and making decisions about what to do next.
The core tool is the SIEM, which stands for Security Information and Event Management. A SIEM aggregates logs from across an organisation's infrastructure - network devices, servers, endpoints, cloud services, applications - and applies rules and correlation logic to generate alerts when something looks suspicious. Platforms like Splunk, Microsoft Sentinel, and IBM QRadar are among the most widely used. When an alert fires, it lands in the analyst's queue. That is where the real work begins.
The Queue: Where Every Shift Starts
A junior SOC analyst typically begins their shift by reviewing the alert queue. In most SOCs this is a list of active alerts ranked by severity, with older unresolved ones carrying over from the previous shift. There will usually be more alerts than any analyst can thoroughly investigate in a single shift. That is not a bug in the system. It is the normal operating condition of every SOC, and learning to work effectively within it is one of the first practical skills the role demands.
The queue does not tell you which alerts are real threats and which are noise. That is what triage is for.
Triage: The First Decision
Triage is the process of making a fast, informed judgement about whether an alert warrants a full investigation. The word comes from emergency medicine, and the analogy holds: you are sorting by urgency and likely severity before committing resources.
When an alert lands, the first questions an analyst asks are basic. What triggered this? Which system is involved, and how critical is it to the business? Has this user or IP address done this before? Does this pattern match anything in known threat intelligence?
Most alerts at this stage will resolve quickly. A login from an unusual location might turn out to be a remote employee. A flagged process might be a legitimate IT tool that the detection rules have not been tuned to exclude. These are false positives, and they make up a significant proportion of what a junior analyst handles. Learning to recognise and close them efficiently is a core skill.
What you are looking for in triage is anything that does not have an obvious benign explanation. When that is the case, the alert moves from a quick check to a full investigation.
The Investigation: Building a Picture
A real investigation is not a linear checklist. It is more like assembling a narrative. You start with a single alert and try to answer a question: is this evidence of a genuine threat, and if so, how far has it gone?
Here is how that typically unfolds.
Step one: understand the alert in context. The alert itself usually shows you a single event, such as a file executed, a connection made, a login attempted. Your job is to understand what happened immediately before and immediately after. In the SIEM, this means pivoting: searching for other events associated with the same user, the same host, or the same IP address in the surrounding time window. A single unusual process execution means something different if it is preceded by a phishing email and followed by an outbound connection than if it is an isolated event with no other signals around it.
Step two: enrich the indicators. Whenever you have an indicator - an IP address, a domain, a file hash - you want to know what is known about it. VirusTotal is one of the most commonly used tools for this. It allows analysts to submit file hashes, domains, or URLs and see whether any of the major security vendors have flagged them as malicious. A file hash with zero detections means something different to one flagged by thirty vendors. Threat intelligence platforms used internally by the SOC will also surface whether an indicator has been seen in previous incidents or matches a known threat actor's infrastructure.
Step three: understand the technique. Good analysts do not just look at what happened. They think about what it might mean in terms of attacker behaviour. The MITRE ATT&CK framework is the standard reference for this. It is a publicly available knowledge base that catalogues the tactics and techniques used by real-world adversaries, organised by phase of an attack: initial access, execution, persistence, privilege escalation, lateral movement, and so on. If an alert maps to a known ATT&CK technique, the framework tells you what adversaries typically do next, which helps you know where to look and what to ask.
Step four: determine scope. Once you have a clearer picture of what happened, the next question is how far it has spread. Has the same behaviour been seen on other machines? Are there signs of lateral movement, where an attacker has moved from one system to another? Have any accounts been compromised? This is where the investigation expands beyond the original alert and often where a junior analyst's findings become genuinely consequential.
True Positive or False Positive?
Every investigation ends with a classification. After gathering context and building a picture, the analyst decides whether the alert represents a genuine security event or a benign explanation.
A false positive gets closed with a note explaining the investigation and why it was dismissed. Good documentation matters here because it helps tune the SIEM over time, reducing the same false positive from firing again and again.
A true positive is a confirmed or suspected genuine threat. That is when the process shifts from investigation to response, and in most cases for a junior analyst, that means escalation.
Escalation: Knowing When to Hand Up
Escalation is the process of passing an investigation to a more senior analyst, or triggering a wider incident response, when the evidence suggests something serious is happening or the investigation has gone beyond what a junior analyst should handle alone.
This is a judgement call, and it is one of the things that genuinely takes experience to develop. Escalating too readily wastes senior analyst time and undermines confidence. Failing to escalate when something serious is developing is far worse.
The practical signals that warrant escalation are: evidence of active compromise, signs that more than one system is involved, indicators of data exfiltration, anything involving critical systems like domain controllers or cloud identity services, and any situation where you have evidence of a real threat but no clear picture of its extent.
When escalating, the quality of your handoff matters as much as the finding itself. A senior analyst inheriting a case needs to understand what you found, what you investigated, what you ruled out, and what questions remain open. A clear, structured escalation note saves time and avoids duplication.
Documentation: The Work That Outlasts the Shift
Every investigation, whether it closes as a false positive or escalates as a real incident, needs to be documented. This is not bureaucratic overhead. It serves several practical purposes.
It creates an audit trail that supports regulatory compliance and internal review. It helps analysts who pick up a case mid-investigation understand what has already been done. It feeds into the SOC's longer-term knowledge base, helping the team tune detections, improve playbooks, and recognise patterns across incidents over time.
Good documentation records what the alert was, what evidence was reviewed, what the conclusion was, and what action was taken. It does not need to be lengthy. It needs to be accurate, clear, and reproducible. Another analyst reading your notes should be able to understand exactly what you did and why.
The Skills Behind the Workflow
Walking through the workflow makes it look structured and predictable. In practice, the ability to execute it well rests on a foundation of specific technical knowledge.
You need to understand how networks work at a level that lets you read logs intelligently; what normal traffic looks like, what the common protocols are, and what deviation means. You need to be comfortable navigating a SIEM, writing basic queries, and interpreting the output. You need enough familiarity with Windows and Linux operating systems to recognise what a legitimate process looks like versus one that has been abused. And you need the analytical discipline to build a coherent narrative from scattered evidence rather than jumping to conclusions.
These are not skills you develop by reading about them. They develop through repeated practice in realistic environments.
How TryHackMe Prepares You for This Work
The SOC Level 1 learning path on TryHackMe is built specifically around the workflow described in this article. It covers SIEM fundamentals, network security monitoring, alert triage, Windows and Linux investigation, and threat intelligence, all through guided hands-on labs that put you inside the tools rather than simply explaining them. Modules covering Splunk, traffic analysis with Wireshark, and working with threat intelligence feeds give you direct experience with the same tooling you will encounter in a real SOC.
For those who want to validate that foundation, the SAL1 certification goes further. The exam places you inside a SOC simulator and requires you to investigate realistic cases under time constraints, triage alerts, interpret evidence, and document your findings clearly. It is the closest thing to a real shift that a certification can offer, and it is designed to demonstrate the kind of practical readiness that employers are actually looking for.
If you are earlier in your journey and still building foundational knowledge, the Cyber Security 101 path covers the networking and operating systems fundamentals that SOC work rests on.
The Gap Between Theory and the Queue
The hardest part of a first SOC role is not the tools or the frameworks. It is the judgement: knowing when something is genuinely suspicious, knowing how far to investigate before escalating, knowing how to write a finding clearly under pressure.
That judgement does not arrive with a certification. It develops through practice. The analysts who build it fastest are the ones who have already spent time working through realistic investigation scenarios before their first real shift, who have already made the mistakes in a safe environment, and who have already developed the habit of thinking like a defender.
That is what structured, practical training is designed to produce.
Start Practising the Workflow Today
If you want to build real SOC analyst skills in a hands-on environment, TryHackMe's SOC Level 1 path is the place to start. Work through the investigations, develop the instincts, and validate your ability with the SAL1 certification when you are ready.
Nick O'Grady