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You are here: Home / News / Kampanye worm phishing ini mengubah permainan dalam pencurian kata sandi dan pengambilalihan akun

Kampanye worm phishing ini mengubah permainan dalam pencurian kata sandi dan pengambilalihan akun

October 1, 2020 by Winnie the Pooh

Pada tanggal 29 September, arsitek keamanan siber dan pemburu bug bounty Craig Hays menguraikan upaya phishing baru-baru ini yang jauh melampaui taktik spray-dan-pray biasa dan upaya dasar untuk menyusupi jaringan, untuk menjadi “pencuri sandi terbesar yang pernah dilihatnya”.

“Kami dapat melihat bahwa semua akun sedang diakses dari lokasi asing di seluruh dunia dan mengirimkan sejumlah besar email,” kata Hays. “Untuk begitu banyak akun yang terkena serangan sekaligus, itu adalah serangan phishing yang benar-benar efektif, atau seseorang telah menunggu waktu mereka setelah mencuri kredensial dalam waktu yang lama.”

“Email phishing dikirim sebagai balasan ke email asli,” jelas peneliti. “Email dipertukarkan antar karyawan dan pemasok kami, pelanggan kami, dan bahkan secara internal antar rekan kerja.”

Beginilah cara kerjanya: setelah satu akun email disusupi, kredensial untuk akun tersebut dikirim ke bot jarak jauh. Bot kemudian akan masuk ke akun dan menganalisis email yang dikirim dalam beberapa hari terakhir.

“Untuk setiap rantai email unik yang ditemukan, mereka membalas email terbaru dengan link ke halaman phishing untuk mendapatkan kredensial,” kata Hays. “Kata-katanya cukup umum untuk menyusaikan hampir semua skenario dan tautan ke ‘dokumen’ tidak terlihat aneh.”

Dikirim sebagai balasan ke semua, menggunakan akun email yang sah, dan mengingat riwayat percakapan, sulit untuk mencoba membedakan bot dan pemilik akun asli.

Teknik tersebut, yang menghasilkan pengambilalihan masal seperti worm, membuat Hays “kagum” dengan “jumlah akun fenomenal [yang] disusupi dalam beberapa jam.”

Email phishing juga dikirim ke orang lain di luar organisasi.

Otentikasi multi-faktor lalu dengan cepat diimplementasikan untuk akun email yang tidak mengaktifkan lapisan keamanan tambahan.

Berita selengkapnya dapat dibaca pada tautan di bawah ini;
Source: ZDNet

Tagged With: Cyber Attack, Cybersecurity, Email, Phishing, Security, Worm

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