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Lorenz

Geng Ransomware Lorenz Menanam Backdoor untuk Digunakan Beberapa Bulan Kemudian

January 11, 2023 by Flamango

Peneliti keamanan memperingatkan bahwa menambal kerentanan kritis yang memungkinkan akses ke jaringan tidak cukup untuk bertahan dari serangan ransomware.

Beberapa geng mengeksploitasi kelemahan untuk merencanakan backdoor. Salah satu kasus adalah serangan ransomware Lorenz yang selesai berbulan-bulan setelah peretas memperoleh akses ke jaringan korban menggunakan eksploit untuk bug kritis dalam sistem telepon.

Backdoor Dipasang Sebelum Pembaruan Keamanan
Menurut S-RM, peretas memperoleh akses awal dengan mengeksploitasi kerentanan kritis dalam infrastruktur telepon Mitel, CVE-2022-29499, memungkinkan eksekusi remote kode.

Sementara klien S-RM telah menerapkan tambalan untuk CVE-2022-29499 pada bulan Juli, peretas ransomware Lorenz bergerak lebih cepat dan mengeksploitasi kerentanan dan menanam backdoor sebelum pembaruan yang memperbaiki masalah tersebut.

Periksa Intrusi Sebelum Menerapkan Perbaikan Bug Kritis
Lorenz secara aktif kembali ke backdoor lama, memeriksa bahwa mereka masih memiliki akses dan menggunakannya untuk meluncurkan serangan ransomware.

Para peneliti mencatat bahwa memperbarui perangkat lunak ke versi terbaru pada waktu yang tepat merupakan langkah penting dalam mempertahankan jaringan. Namun dalam kasus kerentanan kritis, perusahaan juga harus memeriksa lingkungan mereka untuk upaya eksploitasi dan kemungkinan intrusi.

Selengkapnya: BleepingComputer

Tagged With: Backdoor, Lorenz, Ransomware

Decryptor ransomware Lorenz memulihkan file korban secara gratis

July 1, 2021 by Winnie the Pooh

Perusahaan keamanan siber Belanda Tesorion telah merilis decryptor gratis untuk ransomware Lorenz, yang memungkinkan korban memulihkan beberapa file mereka secara gratis tanpa membayar uang tebusan.

Lorenz adalah ransomware yang dioperasikan manusia yang mulai beroperasi pada April 2021 dan sejak itu telah mendaftarkan dua belas korban yang datanya mereka curi dan bocorkan di situs kebocoran data ransomware mereka.

Alat dekripsi ransomware Lorenz dapat diunduh dari NoMoreRansom dan akan memungkinkan korban memulihkan beberapa file terenkripsi mereka.

Tidak seperti decryptor ransomware lain yang menyertakan kunci dekripsi sebenarnya, decryptor Tesorion beroperasi secara berbeda dan hanya dapat mendekripsi jenis file tertentu.

Peneliti Tesorion Gijs Rijnders mengatakan kepada BleepingComputer bahwa hanya file dengan struktur file terkenal yang dapat didekripsi, seperti dokumen Office, file PDF, beberapa jenis gambar, dan file film.

Sementara decryptor akan mendekripsi tidak semua jenis file, masih akan memungkinkan mereka yang tidak membayar uang tebusan untuk memulihkan file penting.

selengkapnya : www.bleepingcomputer.com

Tagged With: Lorenz

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