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You are here: Home / News / Kelompok Ransomware Menggunakan Eksploit Microsoft Exchange Baru Untuk Menembus Server

Kelompok Ransomware Menggunakan Eksploit Microsoft Exchange Baru Untuk Menembus Server

December 21, 2022 by Coffee Bean

Pelaku ancaman ransomware Play menggunakan rantai eksploit baru yang melewati mitigasi penulisan ulang URL ProxyNotShell untuk mendapatkan eksekusi kode jarak jauh (RCE) pada server yang rentan melalui Outlook Web Access (OWA).

Perusahaan cybersecurity CrowdStrike melihat eksploit (dijuluki OWASSRF) saat menyelidiki serangan ransomware Play di mana server Microsoft Exchange yang disusupi digunakan untuk menyusup ke jaringan korban.

Untuk menjalankan perintah sewenang-wenang pada server yang disusupi, operator ransomware memanfaatkan Remote PowerShell untuk menyalahgunakan CVE-2022-41082, bug yang sama yang dieksploitasi oleh ProxyNotShell.

Sementara ProxyNotShell mengeksploitasi target CVE-2022-41040, CrowdStrike menemukan bahwa kelemahan yang disalahgunakan oleh eksploit yang baru ditemukan kemungkinan besar adalah CVE-2022-41080, sebuah kelemahan keamanan yang ditandai oleh Microsoft sebagai kritis dan tidak dieksploitasi secara liar yang memungkinkan eskalasi hak istimewa jarak jauh di server Exchange .

OWASSRF PoC exploit (BleepingComputer)

CVE-2022-41080 ditemukan dan dilaporkan oleh zcgonvh dengan 360 noah lab dan rskvp93, Q5Ca, dan nxhoang99 dengan VcsLab dari Viettel Cyber Security.

OWASSRF PoC exploit leaked online
Sementara peneliti keamanan CrowdStrike bekerja mengembangkan kode proof-of-concept (PoC) mereka sendiri untuk mencocokkan info log yang ditemukan saat menyelidiki serangan ransomware Play baru-baru ini, peneliti ancaman Huntress Labs Dray Agha menemukan dan membocorkan alat pelaku ancaman secara online, pada bulan Desember tanggal 14.

CrowdStrike percaya bahwa eksploitasi proof-of-concept digunakan untuk menjatuhkan alat akses jarak jauh seperti Plink dan AnyDesk di server yang disusupi.

Sejak diluncurkan pada bulan Juni, puluhan korban ransomware Play telah mengunggah sampel atau catatan tebusan ke platform ID Ransomware untuk mengidentifikasi ransomware apa yang digunakan untuk mengenkripsi data mereka.

Aktifitas Play Ransomware (ID Ransomware)

Saat ini, tidak ada kebocoran data yang terkait dengan ransomware ini atau indikasi apa pun bahwa data apa pun dicuri selama serangan.

Korban baru-baru ini yang terkena afiliasi ransomware Play termasuk jaringan hotel Jerman H-Hotels, kota Antwerpen di Belgia, dan Pengadilan Córdoba di Argentina.

sumber : bleeping computer

Tagged With: Exploit, geng ransomware, Microsoft, Microsoft Exchange, ProxyShell, Remote Code Execution

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