Che cos'è il formato di file ODIN?
Un file .odin è un file personale che è stato crittografato dal ransomware Locky. Locky è una famiglia di malware per Windows apparsa per la prima volta all'inizio del 2016 che blocca documenti, foto, database e archivi, richiedendo poi un pagamento per la loro restituzione. Intorno a settembre 2016, gli operatori hanno cambiato l'estensione aggiunta da .zepto a .odin, battezzando la variante come il dio norreno. I ricercatori di Fortinet hanno scoperto che il codice di .odin era identico al 98-99% alla precedente build .zepto, quindi si tratta dello stesso malware con una nuova etichetta.
Quando Locky viene eseguito, scansiona circa 400 tipi di file, crittografa ognuno di essi con AES-128 e blocca la chiave AES all'interno di una crittografia RSA-2048. Rinomina quindi ogni file con un identificatore esadecimale come 5FBZ55IG-S575-7GEF-2C7B-5B22862C2225.odin, scartando il nome originale. Elimina inoltre le copie Shadow di Windows (Shadow Volume Copies) e rilascia note di riscatto denominate _HOWDO_text.html e _HOWDO_text.bmp. Trovare file .odin significa che il computer è stato infettato, non che si possiede un formato insolito.
Sicurezza e incolumità
RISCHIO: HIGHThe presence of .odin files means the computer was hit by active ransomware. The .odin files themselves are inert encrypted data and cannot execute, but they signal that Locky ran on the system, deleted shadow copies and may still be present. Never pay the ransom without expert advice, and treat the machine as compromised until it is fully cleaned and, ideally, wiped and rebuilt from a trusted backup.
Dettagli del formato
in sintesi- Samsung Odin firmware package - The Odin flashing tool for Samsung Galaxy devices uses firmware files, but those are typically .tar or .tar.md5 archives rather than a .odin extension. Unrelated to the ransomware.
- ODIN application data - A handful of niche applications have used .odin for internal data or backup files. These are legitimate and unrelated to Locky.
Programmi che aprono file ODIN
Windows4 apps
Malwarebytes
Freemium Run a full scan to detect and remove the Locky infection before attempting any recovery, since the encrypted .odin files themselves cannot be opened.
Emsisoft Anti-Malware
A pagamento Scan the machine to clean out the ransomware, then check Emsisoft's decryptor catalog to confirm whether any tool covers your variant (none exists for Locky .odin).
Windows File Recovery / Shadow Explorer
Gratuito Browse Volume Shadow Copies to restore earlier unencrypted versions of the files, though Locky usually deletes these.
ID Ransomware
Gratuito Upload a ransom note and an .odin sample to confirm the exact ransomware family and whether any decryption is currently possible. Dettagli tecnici
specifiche approfondite| Encoding | AES-128 (ECB mode) file encryption with the AES key protected by RSA-2048 |
| Byte order | N/A (encrypted ciphertext) |
| Container | None; the original file is overwritten in place as raw ciphertext with a renamed filename |
| Encryption | RSA-2048 + AES-128. The AES session keys are generated server-side by the attacker's command-and-control infrastructure, so the private key needed for decryption never stays on the victim machine. |
| Typical size | Roughly the same size as the original encrypted file |
| Structure | The plaintext of a targeted document, image, database or archive is replaced by AES-128 ciphertext. The file is then renamed to a hexadecimal identifier of the form [8]-[4]-[4]-[4]-[12] followed by the .odin extension (for example 5FBZ55IG-S575-7GEF-2C7B-5B22862C2225.odin). The original name and extension are not preserved on disk. |
| Platforms | Windows |
| Notes | Locky's .odin variant targets roughly 400 to 460 file types across documents, databases, images and archives. It deletes Windows Shadow Volume Copies to block local recovery and drops ransom notes named _HOWDO_text.html, _HOWDO_text.bmp and _[2-digit-number]_HOWDO_text.html. It is delivered by spam email carrying WSF/JS script attachments or macro-laden Office documents that download an encrypted DLL and run it via rundll32.exe. Despite the name, victims are infected by Locky using the .odin extension, not a separate 'Odin' malware family; code comparison shows a 98-99% match with the earlier .zepto variant. |
| Rilasciato | September 2016 |
Conversioni ODIN
Domande e risposte della community
chiesto dagli utentiAncora nessuna domanda - sii il primo a chiedere informazioni sui file ODIN.
