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DEARCRY Ransomware

Ransomware DEARCRY baru menargetkan Server Microsoft Exchange

March 12, 2021 by Winnie the Pooh Leave a Comment

Ransomware baru bernama ‘DEARCRY’ menargetkan server Microsoft Exchange, dengan satu korban menyatakan bahwa mereka terinfeksi melalui kerentanan ProxyLogon.

Sejak Microsoft mengungkapkan awal bulan ini bahwa pelaku ancaman membahayakan server Microsoft Exchange menggunakan kerentanan ProxyLogon zero-day yang baru, kekhawatiran yang signifikan adalah ketika pelaku ancaman akan menggunakannya untuk menyebarkan ransomware.

Menurut Michael Gillespie, pembuat situs identifikasi ransomware ID-Ransomware, mulai tanggal 9 Maret, pengguna mulai mengirimkan catatan tebusan baru dan jenis file terenkripsi ke sistemnya.

Setelah meninjau kiriman, Gillespie menemukan bahwa pengguna mengirimkan hampir semuanya dari server Microsoft Exchange.

Menurut Advanced Intel’s Vitali Kremez, ketika diluncurkan, ransomware DearCry akan mencoba mematikan layanan Windows bernama ‘msupdate’. Tidak diketahui ini layanan apa, tetapi tampaknya bukan layanan Windows yang sah.

Ransomware sekarang akan mulai mengenkripsi file di komputer. Saat mengenkripsi file, itu akan menambahkan ekstensi .CRYPT pada nama file.

Sumber: Bleeping Computer

Gillespie memberi tahu BleepingComputer bahwa ransomware menggunakan AES-256 + RSA-2048 untuk mengenkripsi file dan menambahkan ‘DEARCRY!’ string ke awal setiap file yang dienkripsi.

Sayangnya, ransomware tampaknya tidak memiliki kelemahan yang memungkinkan korban untuk memulihkan file mereka secara gratis.

Sumber: Bleeping Computer

Tagged With: Cybersecurity, DEARCRY Ransomware, Microsoft Exchange, ProxyLogon, Ransomware

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