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You are here: Home / News / Trojan Perbankan Mekotio Muncul Kembali Dengan Kode Yang Diubah, Kampanye Tersembunyi

Trojan Perbankan Mekotio Muncul Kembali Dengan Kode Yang Diubah, Kampanye Tersembunyi

November 6, 2021 by Søren

Trojan perbankan Amerika Latin Mekotio bangkit kembali setelah beberapa geng yang mengoperasikannya ditangkap di Spanyol. Lebih dari 100 serangan dalam beberapa minggu terakhir telah menampilkan rutinitas infeksi baru, yang menunjukkan bahwa kelompok tersebut terus secara aktif memperlengkapi kembali.

“Kampanye baru dimulai tepat setelah Pengawal Sipil Spanyol mengumumkan penangkapan 16 orang yang terlibat dengan distribusi Mekotio [alias Metamorfo] pada bulan Juli,” menurut Check Point Research (CPR). “Tampaknya komplotan di belakang malware mampu mempersempit celah dengan cepat dan mengubah taktik untuk menghindari deteksi.”

Mekotio, seperti trojan perbankan Amerika Latin lainnya, mencuri login perbankan online dan kredensial keuangan lainnya dari korban yang tidak menaruh curiga. Tapi mereka terus berkembang untuk menghindari deteksi.

Dalam kasus ini, vektor infeksi Mekotio yang diperbarui mengandung “elemen yang belum pernah terjadi sebelumnya” untuk menjaga tingkat deteksi tetap rendah, menurut analisis perusahaan, yang dikeluarkan Rabu.

Hal tersebut adalah:File batch tersembunyi dengan setidaknya dua lapisan kerumitan; Skrip PowerShell tanpa file baru yang berjalan langsung di memori;Penggunaan Themida v3 untuk mengemas muatan DLL akhir.

“Dalam tiga bulan terakhir, kami melihat sekitar 100 serangan menggunakan teknik kebingungan baru yang sederhana, dengan bantuan sandi substitusi, untuk menyembunyikan modul serangan pertama,” menurut CPR. “Teknik kebingungan sederhana ini memungkinkannya untuk tidak terdeteksi oleh sebagian besar produk antivirus.”

Selengkapnya: Threat Post

Tagged With: Banking Trojan, Trojan

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