Most Common Online Scams in – A Cybersecurity Deep Dive

A journalist deliberately clicked on 4 online scams to expose their dangers. Here’s what happened:

1️⃣ Fake Security Update

• Scam: A phishing email impersonating “Wells Fargo” leads to a fake Captcha page, then prompts downloading a malicious `.exe` (disguised as ConnectWise remote access tool).
• Defense:

  Verify file hashes before execution (Linux) 
  sha256sum suspicious_file.exe 
  Check URL reputation 
  curl -I "https://example.com" | grep -i "location" 
  

2️⃣ Fake Captcha Executing PowerShell

• Scam: A “I’m not a robot” Captcha secretly runs malicious PowerShell code.
• Defense:

  Disable PowerShell execution remotely (Windows) 
  Set-ExecutionPolicy Restricted -Force 
  Monitor suspicious processes 
  Get-Process | Where-Object { $_.CPU -gt 50 } 
  

3️⃣ Fake Invoice Scam

• Scam: A fake antivirus invoice urges victims to call a “support” number, leading to remote control.
• Defense:

  Block unknown callers (Android/Linux) 
  adb shell service call phone 2 s16 "0123456789" 
  Check running services 
  netstat -tuln 
  

4️⃣ Phantom Toll SMS

• Scam: SMS with a fake government link steals banking details.
• Defense:

  Inspect shortened URLs 
  curl -sL "https://bit.ly/example" | grep -E "href|http" 
  Block SMS phishing (Android) 
  adb shell pm disable-user com.android.mms 
  

You Should Know:

• Sandbox Testing: Always test suspicious links in a VM:

  Create a disposable VM (Linux) 
  qemu-system-x86_64 -hda ~/sandbox.qcow2 -snapshot 
  

• Email Analysis: Use `mxtoolbox.com` to verify sender domains.
• Browser Isolation:

  firefox --no-remote --profile $(mktemp -d) 
  

What Undercode Say:

Human error remains the weakest link. Attackers exploit urgency and trust. Always:
– Verify URLs:

dig +short example.com  Check DNS records 

– Monitor Processes:

watch -n 1 'ps aux | grep -i "powershell|wget|curl"' 

– Block Malicious IPs:

sudo iptables -A INPUT -s 1.2.3.4 -j DROP 

Expected Output: A hardened system with zero trust for unsolicited requests.

Source: lnkd.in/eYaq7aVj

References:

Reported By: UgcPost 7317595779735453697 – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅

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