{"id":369,"date":"2026-01-21T11:56:57","date_gmt":"2026-01-21T03:56:57","guid":{"rendered":"https:\/\/ronron.id\/blog\/?p=369"},"modified":"2026-01-21T12:25:31","modified_gmt":"2026-01-21T04:25:31","slug":"bypass-ssl-pinning-flutter-intercept-https-traffic-saat-semua-metode-gagal","status":"publish","type":"post","link":"https:\/\/ronron.id\/blog\/bypass-ssl-pinning-flutter-intercept-https-traffic-saat-semua-metode-gagal\/","title":{"rendered":"Bypass SSL Pinning Flutter: Intercept HTTPS Traffic Saat Semua Metode Gagal"},"content":{"rendered":"\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>Ketika Burp Suite diam membisu dan Frida tak berdaya, rahasia aplikasi Flutter seringkali tersembunyi di balik lapisan native code dan BoringSSL yang bandel.<\/strong><\/p>\n<\/blockquote>\n\n\n\n<p>Sebagai seorang pentester atau pengembang yang ingin menganalisis keamanan aplikasi, Anda pasti pernah mengalami frustrasi saat mencoba meng-intercept traffic HTTPS aplikasi Flutter. Proxy biasa tidak bekerja, script Frida yang biasanya ampuh tiba-tiba tak berdaya, dan aplikasi tetap diam menyimpan rahasia komunikasinya dengan server. Artikel ini akan membimbing Anda melalui&nbsp;<strong>metode bypass SSL pinning pada aplikasi Flutter<\/strong>&nbsp;yang terbukti efektif bahkan ketika pendekatan konvensional gagal total, berdasarkan pengalaman nyata dan penelitian mendalam<a href=\"https:\/\/m4kr0x.medium.com\/flutter-tls-bypass-how-to-intercept-https-traffic-when-all-other-frida-scripts-fail-bd3d04489088\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/sensepost.com\/blog\/2025\/intercepting-https-communication-in-flutter-going-full-hardcore-mode-with-frida\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">1. Mengapa Flutter Sangat Berbeda dan Menantang?<\/h2>\n\n\n\n<p>Sebelum masuk ke solusi, penting untuk memahami&nbsp;<strong>akar permasalahan<\/strong>&nbsp;mengapa Flutter begitu sulit di-intercept dibandingkan aplikasi native Android atau iOS.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1.1 Arsitektur Unik Flutter<\/h3>\n\n\n\n<p>Flutter bukan sekadar framework UI biasa. Aplikasi Flutter terdiri dari:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Dart Framework<\/strong>: Kode aplikasi yang ditulis developer dalam Dart<\/li>\n\n\n\n<li><strong>Flutter Engine<\/strong>: Runtime portabel yang ditulis terutama dalam C++ untuk menjalankan aplikasi Flutter<a href=\"https:\/\/sensepost.com\/blog\/2025\/intercepting-https-communication-in-flutter-going-full-hardcore-mode-with-frida\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n\n\n\n<li><strong>BoringSSL<\/strong>: Library kriptografi Google yang digunakan untuk SSL\/TLS, bukan library sistem standar<a href=\"https:\/\/sensepost.com\/blog\/2025\/intercepting-https-communication-in-flutter-going-full-hardcore-mode-with-frida\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n<\/ul>\n\n\n\n<p>Kompilasi Ahead-of-Time (AOT) Flutter menghasilkan&nbsp;<strong>snapshot binary<\/strong>&nbsp;yang berisi kode mesin dari framework Flutter dan kode sumber pengembang, membuat analisis menjadi lebih kompleks<a href=\"https:\/\/sensepost.com\/blog\/2025\/intercepting-https-communication-in-flutter-going-full-hardcore-mode-with-frida\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1.2 Masalah Utama dalam Intercepting Traffic<\/h3>\n\n\n\n<p>Dua tantangan utama yang dihadapi:<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Proxy Unaware<\/strong>: Aplikasi Flutter mengabaikan pengaturan proxy sistem. Mengatur proxy di pengaturan perangkat tidak akan memengaruhi aplikasi Flutter<a href=\"https:\/\/www.blackhillsinfosec.com\/intercepting-traffic-for-mobile-applications\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/alright21.github.io\/security\/mobile_flutter\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/www.intuity.it\/2024\/05\/07\/bypassing-certificate-pinning-on-flutter-based-android-apps-a-new-guide-2\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>.<\/li>\n\n\n\n<li><strong>Verifikasi Sertifikat Native<\/strong>: Validasi sertifikat SSL dilakukan di&nbsp;<strong>lapisan native<\/strong>&nbsp;melalui BoringSSL, bukan menggunakan store CA sistem Android\/iOS<a href=\"https:\/\/sensepost.com\/blog\/2025\/intercepting-https-communication-in-flutter-going-full-hardcore-mode-with-frida\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/www.intuity.it\/2024\/05\/07\/bypassing-certificate-pinning-on-flutter-based-android-apps-a-new-guide-2\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>.<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">1.3 Kegagalan Pendekatan Konvensional<\/h3>\n\n\n\n<p>Banyak pentester mencoba pendekatan standar yang biasanya bekerja untuk aplikasi native:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Script Frida untuk mem-bypass pinning (sering gagal)<\/li>\n\n\n\n<li>Memasang sertifikat CA Burp ke sistem (tidak efektif)<\/li>\n\n\n\n<li>Tool otomatis seperti Objection (terbatas fungsionalitasnya)<\/li>\n<\/ul>\n\n\n\n<p>Kegagalan ini terjadi karena&nbsp;<strong>logika keamanan berada di dalam&nbsp;libflutter.so<\/strong>, library native yang tidak terekspos ke layer Java\/Kotlin yang biasanya di-hook oleh Frida<a href=\"https:\/\/sensepost.com\/blog\/2025\/intercepting-https-communication-in-flutter-going-full-hardcore-mode-with-frida\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2. Kasus Nyata: Saat Semua Script Frida Gagal<\/h2>\n\n\n\n<p>Pengalaman nyata dari seorang peneliti keamanan mengilustrasikan tantangan ini dengan baik. Saat menganalisis APK Flutter, ia menemukan bahwa:<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Tidak ada traffic yang muncul di Burp Suite meski proxy sudah dikonfigurasi dengan benar<a href=\"https:\/\/m4kr0x.medium.com\/flutter-tls-bypass-how-to-intercept-https-traffic-when-all-other-frida-scripts-fail-bd3d04489088\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>.<\/li>\n\n\n\n<li>Berbagai script Frida yang tersedia online tidak berfungsi<a href=\"https:\/\/m4kr0x.medium.com\/flutter-tls-bypass-how-to-intercept-https-traffic-when-all-other-frida-scripts-fail-bd3d04489088\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>.<\/li>\n\n\n\n<li>Pendekatan reflutter (tool patching statis) juga gagal dalam kasusnya<a href=\"https:\/\/m4kr0x.medium.com\/flutter-tls-bypass-how-to-intercept-https-traffic-when-all-other-frida-scripts-fail-bd3d04489088\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>.<\/li>\n<\/ol>\n\n\n\n<p>Yang menarik, script yang sama&nbsp;<strong>berfungsi untuk rekan-nya<\/strong>&nbsp;yang menggunakan emulator berbasis ARM, sementara ia menggunakan emulator x86_64<a href=\"https:\/\/m4kr0x.medium.com\/flutter-tls-bypass-how-to-intercept-https-traffic-when-all-other-frida-scripts-fail-bd3d04489088\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>. Perbedaan arsitektur ini menyebabkan pola memory berbeda sehingga script gagal menemukan fungsi target yang benar.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">3. Reverse Engineering&nbsp;libflutter.so<\/h2>\n\n\n\n<p>Ketika pendekatan standar gagal, solusinya adalah&nbsp;<strong>melakukan reverse engineering langsung pada library Flutter<\/strong>. Berikut langkah-langkah sistematisnya:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3.1 Ekstraksi dan Analisis Awal<\/h3>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"804\" src=\"https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_4.BRAhQUDn_ZQwYlT-1024x804.webp\" alt=\"\" class=\"wp-image-371\" srcset=\"https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_4.BRAhQUDn_ZQwYlT-1024x804.webp 1024w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_4.BRAhQUDn_ZQwYlT-300x235.webp 300w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_4.BRAhQUDn_ZQwYlT-768x603.webp 768w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_4.BRAhQUDn_ZQwYlT.webp 1180w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<p>Di dalam folder ini, Anda akan menemukan dua file penting:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>libapp.so<\/strong>: Berisi kode Dart aplikasi yang sudah dikompilasi<a href=\"https:\/\/www.intuity.it\/2024\/05\/07\/bypassing-certificate-pinning-on-flutter-based-android-apps-a-new-guide-2\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n\n\n\n<li><strong>libflutter.so<\/strong>: Engine Flutter yang menangani SSL dan fungsi native lainnya<a href=\"https:\/\/sensepost.com\/blog\/2025\/intercepting-https-communication-in-flutter-going-full-hardcore-mode-with-frida\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/www.intuity.it\/2024\/05\/07\/bypassing-certificate-pinning-on-flutter-based-android-apps-a-new-guide-2\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3.2 Mencari Fungsi Verifikasi Sertifikat<\/h3>\n\n\n\n<p>Flutter menggunakan BoringSSL, dan fungsi verifikasi sertifikat utama berada di&nbsp;<code>ssl_crypto_x509_session_verify_cert_chain<\/code>&nbsp;dalam file&nbsp;<code>ssl_x509.cc<\/code><a href=\"https:\/\/sensepost.com\/blog\/2025\/intercepting-https-communication-in-flutter-going-full-hardcore-mode-with-frida\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/www.intuity.it\/2024\/05\/07\/bypassing-certificate-pinning-on-flutter-based-android-apps-a-new-guide-2\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>. Karena simbol dalam&nbsp;libflutter.so&nbsp;ter-strip, kita perlu menemukannya secara manual:<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"832\" src=\"https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_5.D3jpGA5u_Z2v5B6y-1024x832.webp\" alt=\"\" class=\"wp-image-372\" srcset=\"https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_5.D3jpGA5u_Z2v5B6y-1024x832.webp 1024w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_5.D3jpGA5u_Z2v5B6y-300x244.webp 300w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_5.D3jpGA5u_Z2v5B6y-768x624.webp 768w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_5.D3jpGA5u_Z2v5B6y.webp 1163w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Buka&nbsp;libflutter.so&nbsp;di Ghidra\/IDA<\/strong><\/li>\n\n\n\n<li><strong>Cari string &#8220;ssl_client&#8221;<\/strong>&nbsp;(Search \u2192 For Strings)<a href=\"https:\/\/m4kr0x.medium.com\/flutter-tls-bypass-how-to-intercept-https-traffic-when-all-other-frida-scripts-fail-bd3d04489088\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n\n\n\n<li><strong>Periksa cross-references (XREFs)<\/strong>&nbsp;dari string ini<a href=\"https:\/\/m4kr0x.medium.com\/flutter-tls-bypass-how-to-intercept-https-traffic-when-all-other-frida-scripts-fail-bd3d04489088\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n\n\n\n<li><strong>Identifikasi fungsi<\/strong>&nbsp;dengan karakteristik:\n<ul class=\"wp-block-list\">\n<li>Menerima 3 argumen<\/li>\n\n\n\n<li>Mengembalikan nilai boolean (true\/false)<a href=\"https:\/\/m4kr0x.medium.com\/flutter-tls-bypass-how-to-intercept-https-traffic-when-all-other-frida-scripts-fail-bd3d04489088\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"538\" src=\"https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_6.BdveQwHm_v5wMH-1024x538.webp\" alt=\"\" class=\"wp-image-373\" srcset=\"https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_6.BdveQwHm_v5wMH-1024x538.webp 1024w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_6.BdveQwHm_v5wMH-300x158.webp 300w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_6.BdveQwHm_v5wMH-768x403.webp 768w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_6.BdveQwHm_v5wMH-1536x807.webp 1536w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_6.BdveQwHm_v5wMH.webp 1908w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"664\" height=\"449\" src=\"https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_7.D0dOC5wj_1BlYiv.webp\" alt=\"\" class=\"wp-image-374\" srcset=\"https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_7.D0dOC5wj_1BlYiv.webp 664w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_7.D0dOC5wj_1BlYiv-300x203.webp 300w\" sizes=\"auto, (max-width: 664px) 100vw, 664px\" \/><\/figure>\n<\/div>\n\n\n<p>Cari <strong>ssl_client<\/strong>, lalu klik dua kali pada hasilnya dan jelajahi <strong>XREF<\/strong>-nya.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"515\" src=\"https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_8.Cw1N_dhM_Z2gTlU4-1024x515.webp\" alt=\"\" class=\"wp-image-375\" srcset=\"https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_8.Cw1N_dhM_Z2gTlU4-1024x515.webp 1024w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_8.Cw1N_dhM_Z2gTlU4-300x151.webp 300w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_8.Cw1N_dhM_Z2gTlU4-768x386.webp 768w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_8.Cw1N_dhM_Z2gTlU4.webp 1447w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<p>Ada 2 <strong>XREF<\/strong>, mungkin Anda menemukan lebih banyak <strong>XREF<\/strong> jadi periksa semuanya.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"943\" height=\"258\" src=\"https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_9.CL57yPYa_Z1cWF4s.webp\" alt=\"\" class=\"wp-image-376\" srcset=\"https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_9.CL57yPYa_Z1cWF4s.webp 943w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_9.CL57yPYa_Z1cWF4s-300x82.webp 300w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_9.CL57yPYa_Z1cWF4s-768x210.webp 768w\" sizes=\"auto, (max-width: 943px) 100vw, 943px\" \/><\/figure>\n<\/div>\n\n\n<p>Periksa setiap fungsi yang dirujuk <strong>( FUN_&#8230; )<\/strong> secara manual dengan mengklik dua kali <strong>FUN_<\/strong> dan fungsi yang benar adalah fungsi yang menerima 3 argumen dan mengembalikan nilai boolean.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"493\" src=\"https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_10.CHovv6Yf_1zglkK-1024x493.webp\" alt=\"\" class=\"wp-image-377\" srcset=\"https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_10.CHovv6Yf_1zglkK-1024x493.webp 1024w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_10.CHovv6Yf_1zglkK-300x144.webp 300w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_10.CHovv6Yf_1zglkK-768x370.webp 768w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_10.CHovv6Yf_1zglkK-1536x740.webp 1536w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_10.CHovv6Yf_1zglkK.webp 1545w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"492\" src=\"https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_11.JZQ7-eJ0_ZpXCiT-1024x492.webp\" alt=\"\" class=\"wp-image-378\" srcset=\"https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_11.JZQ7-eJ0_ZpXCiT-1024x492.webp 1024w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_11.JZQ7-eJ0_ZpXCiT-300x144.webp 300w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_11.JZQ7-eJ0_ZpXCiT-768x369.webp 768w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_11.JZQ7-eJ0_ZpXCiT-1536x738.webp 1536w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_11.JZQ7-eJ0_ZpXCiT.webp 1558w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<p>Dalam kasus ini, fungsi kedua adalah yang benar.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3.3 Menghitung Offset untuk Frida<\/h3>\n\n\n\n<p>Setelah menemukan fungsinya, dapatkan offset dengan mengklik dua kali pada nama fungsi tersebut.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"482\" src=\"https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_12.CzOxCJoD_ZAiAqI-1024x482.webp\" alt=\"\" class=\"wp-image-379\" srcset=\"https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_12.CzOxCJoD_ZAiAqI-1024x482.webp 1024w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_12.CzOxCJoD_ZAiAqI-300x141.webp 300w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_12.CzOxCJoD_ZAiAqI-768x361.webp 768w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_12.CzOxCJoD_ZAiAqI-1536x722.webp 1536w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_12.CzOxCJoD_ZAiAqI.webp 1563w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<p>Setelah menemukan fungsi target, catat offsetnya. Contoh:&nbsp;<code>0x02184644<\/code><a href=\"https:\/\/m4kr0x.medium.com\/flutter-tls-bypass-how-to-intercept-https-traffic-when-all-other-frida-scripts-fail-bd3d04489088\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>. Kurangi dengan base load address (biasanya&nbsp;<code>0x100000<\/code>) untuk mendapatkan offset relatif:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>0x02184644 - 0x100000 = 0x2084644<\/code><\/pre>\n\n\n\n<p>Offset ini akan digunakan dalam script Frida untuk menemukan fungsi dalam memory saat runtime<a href=\"https:\/\/m4kr0x.medium.com\/flutter-tls-bypass-how-to-intercept-https-traffic-when-all-other-frida-scripts-fail-bd3d04489088\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">4. Solusi Praktis: Script Frida yang Disesuaikan<\/h2>\n\n\n\n<p>Berdasarkan analisis di atas, berikut adalah pendekatan praktis yang bisa langsung Anda terapkan:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4.1 Script Frida untuk Bypass SSL Verification<\/h3>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"901\" height=\"433\" src=\"https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_13.DCF8qOfN_Z2dnWfL.webp\" alt=\"\" class=\"wp-image-380\" srcset=\"https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_13.DCF8qOfN_Z2dnWfL.webp 901w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_13.DCF8qOfN_Z2dnWfL-300x144.webp 300w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_13.DCF8qOfN_Z2dnWfL-768x369.webp 768w\" sizes=\"auto, (max-width: 901px) 100vw, 901px\" \/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\">4.2 Menjalankan Script<\/h3>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"608\" src=\"https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_14.DkDJY6ci_2ir77R-1024x608.webp\" alt=\"\" class=\"wp-image-381\" srcset=\"https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_14.DkDJY6ci_2ir77R-1024x608.webp 1024w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_14.DkDJY6ci_2ir77R-300x178.webp 300w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_14.DkDJY6ci_2ir77R-768x456.webp 768w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_14.DkDJY6ci_2ir77R.webp 1088w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<p>Seperti yang diharapkan, proses intercept menggunakan script Frida yang disesuaikan berhasil.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"222\" src=\"https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_15.B-3ye08R_1c36wp-1024x222.webp\" alt=\"\" class=\"wp-image-382\" srcset=\"https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_15.B-3ye08R_1c36wp-1024x222.webp 1024w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_15.B-3ye08R_1c36wp-300x65.webp 300w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_15.B-3ye08R_1c36wp-768x167.webp 768w, https:\/\/ronron.id\/blog\/wp-content\/uploads\/flutter_15.B-3ye08R_1c36wp.webp 1341w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\">4.3 Alternatif: Metode JNI_OnLoad Offset<\/h3>\n\n\n\n<p>Pendekatan lain adalah menggunakan&nbsp;<strong>export JNI_OnLoad<\/strong>&nbsp;sebagai anchor point, karena ini adalah simbol yang tidak ter-strip<a href=\"https:\/\/www.intuity.it\/2024\/05\/07\/bypassing-certificate-pinning-on-flutter-based-android-apps-a-new-guide-2\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>:<\/p>\n\n\n\n<p>javascript<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>function disable_certificate_validation() {\n    var m = Process.findModuleByName(\"libflutter.so\");\n    var jni_onload_addr = m.enumerateExports()&#91;0].address;\n    \n    <em>\/\/ Tambahkan offset antara fungsi target dan JNI_OnLoad<\/em>\n    let target_addr = ptr(jni_onload_addr).add(0x0027b624); <em>\/\/ Ganti offset!<\/em>\n    \n    Interceptor.attach(target_addr, {\n        onLeave: function(retval) {\n            retval.replace(0x1); <em>\/\/ Selalu return true<\/em>\n        }\n    });\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">5. Teknik Pendukung untuk Intercepting Traffic<\/h2>\n\n\n\n<p>Bypass SSL verification saja tidak cukup jika aplikasi tidak mengirim traffic melalui proxy. Berikut teknik pendukung yang diperlukan:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5.1 Redireksi Traffic dengan iptables (Android)<\/h3>\n\n\n\n<p>Untuk perangkat Android yang ter-root, gunakan iptables untuk mengarahkan traffic ke proxy Anda:<\/p>\n\n\n\n<p>bash<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><em># Redirect semua traffic HTTPS ke Burp<\/em>\nadb shell su -c \"iptables -t nat -A OUTPUT -p tcp --dport 443 -j DNAT --to-destination &#91;IP_BURP]:&#91;PORT_BURP]\"\n\n<em># Contoh: <\/em>\nadb shell su -c \"iptables -t nat -A OUTPUT -p tcp --dport 443 -j DNAT --to-destination 192.168.1.100:8080\"<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">5.2 Konfigurasi Burp Suite<\/h3>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Dengarkan di semua interface<\/strong>&nbsp;(Bind to address: All interfaces)<a href=\"https:\/\/m4kr0x.medium.com\/flutter-tls-bypass-how-to-intercept-https-traffic-when-all-other-frida-scripts-fail-bd3d04489088\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/github.com\/kayodeao\/Bypass-ssl-pinning\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n\n\n\n<li><strong>Aktifkan invisible proxying<\/strong>&nbsp;(Request Handling \u2192 Support invisible proxying)<a href=\"https:\/\/www.blackhillsinfosec.com\/intercepting-traffic-for-mobile-applications\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/m4kr0x.medium.com\/flutter-tls-bypass-how-to-intercept-https-traffic-when-all-other-frida-scripts-fail-bd3d04489088\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/github.com\/kayodeao\/Bypass-ssl-pinning\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n\n\n\n<li><strong>Gunakan port tidak standar<\/strong>&nbsp;seperti 8083 untuk menghindari konflik<a href=\"https:\/\/m4kr0x.medium.com\/flutter-tls-bypass-how-to-intercept-https-traffic-when-all-other-frida-scripts-fail-bd3d04489088\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/github.com\/kayodeao\/Bypass-ssl-pinning\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">5.3 Opsi untuk iOS<\/h3>\n\n\n\n<p>Untuk perangkat iOS jailbroken, pendekatannya berbeda:<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Internet Sharing via USB<\/strong><a href=\"https:\/\/www.blackhillsinfosec.com\/intercepting-traffic-for-mobile-applications\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n\n\n\n<li><strong>Konfigurasi pf (Packet Filter)<\/strong>&nbsp;untuk redirect traffic<a href=\"https:\/\/www.blackhillsinfosec.com\/intercepting-traffic-for-mobile-applications\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n\n\n\n<li><strong>Atau gunakan OpenVPN<\/strong>&nbsp;untuk tunnel semua traffic<a href=\"https:\/\/alright21.github.io\/security\/mobile_flutter\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">6. Tool dan Alternatif Lain<\/h2>\n\n\n\n<p>Selain pendekatan reverse engineering manual, beberapa tool dapat membantu:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Tool<\/th><th class=\"has-text-align-left\" data-align=\"left\">Pendekatan<\/th><th class=\"has-text-align-left\" data-align=\"left\">Kelebihan<\/th><th class=\"has-text-align-left\" data-align=\"left\">Kekurangan<\/th><\/tr><\/thead><tbody><tr><td><strong>reFlutter<\/strong><a href=\"https:\/\/github.com\/kayodeao\/Bypass-ssl-pinning\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/medium.com\/fmisec\/tips-bypass-ssl-pinning-pada-aplikasi-flutter-dengan-reflutter-714fe7d90be4\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/td><td>Static patching<\/td><td>Tidak perlu runtime hooking<\/td><td>Perlu build ulang APK, mungkin terdeteksi integrity check<\/td><\/tr><tr><td><strong>HTTP Toolkit Pro<\/strong><a href=\"https:\/\/www.blackhillsinfosec.com\/intercepting-traffic-for-mobile-applications\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/td><td>VPN-based interception<\/td><td>Mudah digunakan, otomatis install cert<\/td><td>Berbayar, mungkin tidak bypass semua pinning<\/td><\/tr><tr><td><strong>ProxyDroid<\/strong><a href=\"https:\/\/alright21.github.io\/security\/mobile_flutter\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/td><td>iptables frontend<\/td><td>Mudah konfigurasi<\/td><td>Hanya Android root<\/td><\/tr><tr><td><strong>Custom Frida Script<\/strong>&nbsp;(dibahas di artikel)<\/td><td>Runtime hooking<\/td><td>Spesifik aplikasi, fleksibel<\/td><td>Butuh reverse engineering manual<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">7. Tips Penting dan Pelajaran yang Didapat<\/h2>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Arsitektur Penting<\/strong>: Script yang bekerja di ARM mungkin gagal di x86_64 dan sebaliknya<a href=\"https:\/\/m4kr0x.medium.com\/flutter-tls-bypass-how-to-intercept-https-traffic-when-all-other-frida-scripts-fail-bd3d04489088\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>. Selalu identifikasi arsitektur target.<\/li>\n\n\n\n<li><strong>Versi Flutter Berpengaruh<\/strong>: Offset dan pola bisa berbeda antar versi Flutter<a href=\"https:\/\/sensepost.com\/blog\/2025\/intercepting-https-communication-in-flutter-going-full-hardcore-mode-with-frida\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>. Tools seperti reFlutter memiliki database hash engine untuk berbagai versi<a href=\"https:\/\/sensepost.com\/blog\/2025\/intercepting-https-communication-in-flutter-going-full-hardcore-mode-with-frida\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>.<\/li>\n\n\n\n<li><strong>Kombinasi Teknik<\/strong>: Seringkali perlu menggabungkan redireksi traffic DAN bypass SSL verification.<\/li>\n\n\n\n<li><strong>Mulai dari Aplikasi Demo<\/strong>: Uji teknik Anda dengan aplikasi Flutter demo sebelum menarget aplikasi produksi<a href=\"https:\/\/m4kr0x.medium.com\/flutter-tls-bypass-how-to-intercept-https-traffic-when-all-other-frida-scripts-fail-bd3d04489088\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">8. Kesimpulan<\/h2>\n\n\n\n<p>Bypass SSL pinning pada aplikasi Flutter memang menantang, tetapi&nbsp;<strong>bukan tidak mungkin<\/strong>. Kunci keberhasilannya adalah:<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Memahami arsitektur Flutter<\/strong>&nbsp;yang unik dengan lapisan native-nya<\/li>\n\n\n\n<li><strong>Melakukan reverse engineering&nbsp;libflutter.so<\/strong>&nbsp;untuk menemukan fungsi verifikasi sertifikat<\/li>\n\n\n\n<li><strong>Membuat script Frida yang spesifik<\/strong>&nbsp;berdasarkan offset yang ditemukan<\/li>\n\n\n\n<li><strong>Menggabungkan dengan teknik redireksi traffic<\/strong>&nbsp;yang sesuai dengan platform target<\/li>\n<\/ol>\n\n\n\n<p>Pendekatan yang dijelaskan dalam artikel ini telah teruji pada kasus nyata di mana metode lain gagal<a href=\"https:\/\/m4kr0x.medium.com\/flutter-tls-bypass-how-to-intercept-https-traffic-when-all-other-frida-scripts-fail-bd3d04489088\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>. Dengan kesabaran dan analisis yang teliti, Anda dapat mengungkap komunikasi tersembunyi dari aplikasi Flutter yang paling aman sekalipun.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ketika Burp Suite diam membisu dan Frida tak berdaya, rahasia aplikasi Flutter seringkali tersembunyi di balik lapisan native code dan BoringSSL yang bandel. Sebagai seorang pentester atau pengembang yang ingin menganalisis keamanan aplikasi, Anda pasti pernah mengalami frustrasi saat mencoba meng-intercept traffic HTTPS aplikasi Flutter. Proxy biasa tidak bekerja, script Frida yang biasanya ampuh tiba-tiba&#8230;<\/p>\n","protected":false},"author":1,"featured_media":370,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,36],"tags":[11,57,23,55,58,56,37,54],"class_list":["post-369","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cyber-security","category-internet","tag-bahasa-pemrograman","tag-burp-suite","tag-cyber-security","tag-flutter","tag-frida","tag-https","tag-internet","tag-ssl"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Bypass SSL Pinning Flutter: Intercept HTTPS Traffic Saat Semua Metode Gagal - RONNY TRI ASMARA<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ronron.id\/blog\/bypass-ssl-pinning-flutter-intercept-https-traffic-saat-semua-metode-gagal\/\" \/>\n<meta property=\"og:locale\" content=\"id_ID\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Bypass SSL Pinning Flutter: Intercept HTTPS Traffic Saat Semua Metode Gagal - RONNY TRI ASMARA\" \/>\n<meta property=\"og:description\" content=\"Ketika Burp Suite diam membisu dan Frida tak berdaya, rahasia aplikasi Flutter seringkali tersembunyi di balik lapisan native code dan BoringSSL yang bandel. 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