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Spoof

Phisher melewati kontrol keamanan Microsoft 365 dengan Microsoft.com yang dipalsukan

December 11, 2020 by Winnie the Pooh

Kampanye email phishing domain spoofing yang sangat meyakinkan meniru Microsoft dan berhasil menipu secure email gateway yang lama baru-baru ini telah ditemukan oleh Ironscales.

Itu juga membuat mereka menemukan bahwa server Microsoft saat ini tidak menerapkan protokol DMARC. “Hal ini sangat membingungkan ketika mengingat Microsoft sering menempati peringkat 5 teratas merek paling sering dipalsukan dari tahun ke tahun,” kata Lomy Ovadia, Wakil Presiden bidang penelitian dan pengembangan perusahaan.

Pada kampanye email phishing baru-baru ini, penyerang memalsukan domain pengirim agar terlihat seperti email yang berasal dari Microsoft. Kemudian penyerang menggunakan kemampuan Microsoft 365 yang relatif baru (untuk meninjau pesan yang dikarantina) sebagai alasan untuk mengelabui pengguna agar mengikuti tautan yang ditawarkan serta menciptakan rasa urgensi.

Tautan tersebut membawa pengguna ke halaman login palsu yang “meminta” kredensial login Microsoft 365, informasi tersebut nantinya akan dikirim ke penyerang.

“Alasan mengapa SEG [secure email gateway] secara tradisional dapat menghentikan spoofing domain yang tepat adalah karena, ketika dikonfigurasi dengan benar, kontrol ini sesuai dengan Domain-based Message Authentication, Reporting and Conformance (DMARC)”, kata Ovadia.

“Layanan email lain yang menghormati dan memberlakukan DMARC akan memblokir email semacam itu. Masih belum diketahui mengapa Microsoft mengizinkan adanya spoof domain mereka sendiri terhadap infrastruktur email mereka,” Ovadia menyimpulkan.

Saat ini kampanye phishing ditujukan untuk pengguna perusahaan Microsoft 365 dalam berbagai industri (finsec, perawatan kesehatan, asuransi, manufaktur, utilitas, telekomunikasi, dll.).

Sumber: Help Net Security

Tagged With: Cybersecurity, Domain Spoofing, Email Phishing, Microsoft, microsoft 365, Phishing, Spoof

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