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You are here: Home / News / APT Korea Utara Beradaptasi dengan Pemblokiran Makro dengan Menggunakan Trik LNK

APT Korea Utara Beradaptasi dengan Pemblokiran Makro dengan Menggunakan Trik LNK

May 5, 2023 by Flamango

Juga dikenal sebagai ‘Scarcruft’, ditemukan menggunakan switch-up LNK canggih untuk melewati pemblokiran makro dalam serangan spionase siber, mengirimkan malware RokRAT.

Kelompok Advanced Persistent Threat (APT) diyakini memiliki hubungan dengan Kementerian Keamanan Negara (MSS) Korea Utara dan dikenal dengan kontra spionase dalam negeri dan kegiatan kontra intelijen di luar negeri.

‘Scarcruft’ memiliki sejarah menggunakan teknik penghindaran anti-malware yang inovatif, seperti eksploit Flash Player (CVE-2016-4117) dan memanfaatkan server yang disusupi, platform perpesanan, dan penyedia layanan cloud untuk menghindari deteksi dan menetapkan perintah dan kontrol (C2).

Grup APT terutama menargetkan individu dan organisasi Korea Selatan melalui serangan spear-phishing yang dirancang untuk memberikan berbagai alat kustom, termasuk malware penghapus, pencuri kredensial, dan utilitas penangkap audio.

Setelah C2 dibuat, APT 37 terlibat dalam pencurian kredensial, eksfiltrasi data, tangkapan layar, pengumpulan informasi sistem, eksekusi perintah dan kode shell, serta manajemen file dan direktori.

Menanggapi tindakan penguncian makro default Microsoft Security 2022, Scarcruft diyakini telah mulai bereksperimen dengan file LNK berukuran besar sebagai rute pengiriman malware RokRAT.

Pada April 2023, ‘Scarcruft’ menggunakan dokumen Word berbasis makro, menggunakan file LNK sebagai umpan untuk mengaktifkan rantai infeksi. Taktik ini ditemukan oleh AhnLab Security Emergency Response Center (ASEC) minggu lalu ketika mereka menemukan perintah PowerShell menyebarkan malware RokRAT.

Tim keamanan diharuskan tetap waspada, disamping peretas terus mengembangkan taktik mereka untuk mengeksploitasi penyimpanan cloud dan aplikasi untuk tujuan perintah dan kontrol, menggunakan serangan multi-rantai yang memanfaatkan makro dan perintah PowerShell.

Selengkapnya: Overt Operator

Tagged With: Cybersecurity, Macro-Blocking, North Korea

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