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Adrozek

Microsoft mengekspos Adrozek, malware yang membajak Chrome, Edge, dan Firefox

December 11, 2020 by Winnie the Pooh

Microsoft telah meningkatkan kewaspadaan tentang jenis malware baru yang menginfeksi perangkat pengguna dan kemudian mulai memodifikasi browser dan pengaturannya untuk memasukkan iklan ke halaman hasil pencarian.

Dinamakan Adrozek, malware tersebut telah aktif setidaknya sejak Mei 2020 dan mencapai puncak absolutnya pada Agustus tahun ini ketika ia mengendalikan lebih dari 30.000 browser setiap hari.

Dalam laporannya, Tim Riset Defender Microsoft 365 yakin bahwa jumlah pengguna yang terinfeksi jauh lebih tinggi. Peneliti Microsoft mengatakan bahwa antara Mei dan September 2020, mereka mengamati “ratusan ribu” deteksi Adrozek di seluruh dunia.

Berdasarkan telemetri internal, konsentrasi korban tertinggi tampaknya berada di Eropa, diikuti oleh Asia Selatan dan Tenggara.

Sumber: Microsoft

Microsoft mengatakan bahwa, saat ini, malware didistribusikan melalui skema pengunduhan drive-by klasik. Pengguna biasanya dialihkan dari situs sah ke shady domain tempat mereka tertipu untuk memasang perangkat lunak berbahaya.

Boobytrapped software menginstal malware Androzek, yang kemudian melanjutkan untuk mendapatkan persistensi booting ulang dengan bantuan registry key. Setelah persistensi terjamin, malware akan mencari peramban yang dipasang secara lokal seperti Microsoft Edge, Google Chrome, Mozilla Firefox, atau Peramban Yandex.

Adrozek juga memodifikasi beberapa file DLL browser untuk mengubah pengaturan browser dan menonaktifkan fitur keamanan untuk menghindari deteksi.

Sumber: Microsoft

Microsoft mengatakan bahwa di Firefox, Adrozek juga berisi fitur sekunder yang mengekstrak kredensial dari browser dan mengunggah data ke server penyerang.

Sumber: ZDNet

Tagged With: Adrozek, Browser, Cybersecurity, Europe, Malware, Microsoft, South East Asia

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