📰 Originally published on Securityelites — AI Red Team Education — the canonical, fully-updated version of this article.
🎯 ETHICAL HACKING PATH
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Part of the Ethical Hacking 100-Day Course
Day 41 of 100 · 41% complete
⚠️ Educational purpose — authorised labs only. I’m teaching process injection so you can understand, detect, and investigate the technique from a defender’s perspective. Keep all practical work inside your own isolated lab and analyse only systems or memory images you are authorised to examine.
We’ve spent the last forty days learning how attackers get inside a system. Today, I want to turn the tables. I’m going to show you how I recognize one of the techniques attackers use to hide what they’re doing: process injection. Think about it this way: instead of seeing a suspicious process running on its own, I might find malicious code hiding inside a completely legitimate process such as explorer.exe. That’s what makes this technique so interesting — and why EDR tools watch it so closely. I’m not going to teach you how to build an injection attack or give you something you can turn into a weapon. Instead, I’m going to walk you through it from my defender’s chair: what I look for, which signals make me suspicious, and how I connect those clues during an investigation. My goal is simple — by the end of this lesson, when you see process injection happening, I want you to recognize it almost instinctively.
🎯 What you’ll master in Day 41
What process injection actually is, and why it maps to ATT&CK T1055
The three technique families you must be able to recognise — and the fingerprint each one leaves
The exact telemetry that gives injection away: Sysmon 8, 10 and 25, and RWX unbacked memory
Hunting injected code in a memory image with Volatility malfind
Writing a behavioural detection that survives real-world false positives
⏱ ~28 min read · 3 hands-on exercises · detection-focused lab Before you start you’ll want: a Windows lab VM you can safely instrument (Windows 10 or 11 is fine), Volatility 3 on your Kali box, and the persistence mindset from Day 40’s DLL hijacking lesson. If you haven’t deployed Sysmon yet, the box below walks you through it — it takes under two minutes and is required for the detection exercises. DEPLOY SYSMON ON YOUR WINDOWS LAB VM**Copy # run these in an elevated PowerShell on your Windows lab VM # step 1 — download Sysmon (Sysinternals, Microsoft-signed) Invoke-WebRequest -Uri “https://download.sysinternals.com/files/Sysmon.zip” -OutFile “$env:TEMP\Sysmon.zip” Expand-Archive “$env:TEMP\Sysmon.zip” -DestinationPath “$env:TEMP\Sysmon” # step 2 — download a community config that enables EID 8, 10 and 25 # SwiftOnSecurity’s config is the industry standard starting point Invoke-WebRequest -Uri “https://raw.githubusercontent.com/SwiftOnSecurity/sysmon-config/master/sysmonconfig-export.xml” -OutFile “$env:TEMP\sysmonconfig.xml” # step 3 — install with the config (accept EULA silently) cd “$env:TEMP\Sysmon” .\Sysmon64.exe -accepteula -i ..\sysmonconfig.xml System Monitor v15.x – System activity monitor Sysmon64 installed. # verify it’s running Get-Service Sysmon64 Status Name DisplayName Running Sysmon64 System Monitor # events now appear in: Event Viewer > Applications and Services Logs > Microsoft > Windows > Sysmon > Operational
💡 What the config does:** SwiftOnSecurity’s config enables Event ID 8 (CreateRemoteThread), 10 (ProcessAccess), and 25 (ProcessTampering) by default, along with dozens of other useful events. Without a config file, Sysmon logs almost nothing — the config is not optional. Once installed you can update it at any time with Sysmon64.exe -c newconfig.xml without reinstalling.
Process Injection — Table of Contents Day 41
- What injection is — and why defenders fear it
- The three families you must recognise
- Why it beats naive defences
- The telemetry that gives it away
- Hunting it in memory with malfind
- Writing a detection that survives
- Why this makes you a better operator too
Before we start, I want to be straight with you about today’s lesson. I know this is an offensive security course, so you might be expecting me to show you how to build a process injector step by step. I’m not going to do that. It’s not because I don’t trust you. It’s because a working, copy-and-paste injector can be turned into a real weapon very quickly, and I don’t believe I need to put that online to teach you the subject properly.
What I can give you is something more valuable: a deep understanding of what process injection looks like from the defender’s side. I’ll show you what happens, what evidence it leaves behind, which behaviors make me suspicious, and how I would investigate those signals. Once you understand the detection side properly, the offensive mechanics start making a lot more sense too. That’s the skill I want you to take away from this course — not just knowing how an attack works, but understanding the consequences of every action and knowing how to recognize it when you see it.
How Process Injection Works — Conceptually
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