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You are here: Home / News / Microsoft: Bagaimana ‘zero trust’ dapat melindungi dari serangan peretasan yang canggih

Microsoft: Bagaimana ‘zero trust’ dapat melindungi dari serangan peretasan yang canggih

January 22, 2021 by Winnie the Pooh

Berbagai teknik yang digunakan oleh peretas SolarWinds sangat canggih namun dalam banyak hal juga biasa dan dapat dicegah, menurut Microsoft.

Untuk mencegah serangan di masa mendatang dengan tingkat kecanggihan yang serupa, Microsoft merekomendasikan organisasi untuk mengadopsi “mentalitas zero trust”, yang menyangkal asumsi bahwa segala sesuatu di dalam jaringan TI aman. Artinya, organisasi harus menganggap pelanggaran dan secara eksplisit memverifikasi keamanan akun pengguna, perangkat endpoint, jaringan, dan sumber daya lainnya.

Seperti yang dicatat oleh direktur keamanan identitas Microsoft, Alex Weinert dalam sebuah posting blog, tiga vektor serangan utama adalah akun pengguna yang disusupi, akun vendor yang disusupi, dan perangkat lunak vendor yang disusupi.

Ribuan perusahaan terkena dampak pelanggaran SolarWinds yang diungkapkan pada pertengahan Desember. Vendor keamanan AS Malwarebytes kemarin mengatakan bahwa mereka juga dilanggar oleh peretas yang sama tetapi tidak melalui pembaruan Orion yang tercemar.

Menurut Weinert, para penyerang mengeksploitasi celah dalam “verifikasi eksplisit” di setiap vektor serangan utama.

“Saat akun pengguna disusupi, teknik yang dikenal seperti password spray, phishing, atau malware digunakan untuk membobol kredensial pengguna dan memberi penyerang akses kritis ke jaringan pelanggan,” tulis Weinert.

Dalam kasus di mana aktor berhasil, Weinert mencatat bahwa akun vendor dengan hak istimewa tidak memiliki perlindungan tambahan seperti otentikasi multi-faktor (MFA), pembatasan rentang IP, kepatuhan perangkat, atau tinjauan akses.

MFA adalah kontrol penting, karena akun dengan hak istimewa tinggi yang disusupi dapat digunakan untuk memalsukan token SAML guna mengakses sumber daya cloud.

“Prinsip pertama Zero Trust adalah memverifikasi secara eksplisit – pastikan Anda memperluas verifikasi ini ke semua permintaan akses, bahkan dari vendor dan terutama yang berasal dari lingkungan lokal.”

Sumber: ZDNet

Tagged With: Cybersecurity, MFA, Microsoft, Security, Zero trust

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