Enterprise-level backup solutions (e.g., Veeam, Acronis) occasionally generate temporary hashed volumes during off-site synchronization.
To determine the underlying content of this specific volume without a header-key, the following steps are proposed:
Based on the syntax, the file likely originates from one of three sources:
Content is frequently obfuscated using random alphanumeric strings to avoid automated "Notice and Takedown" procedures, with external .nzb files providing the translation layer.
Scanning the first 256 bytes for hexadecimal signatures (e.g., 52 61 72 21 1A 07 for RAR5) to verify file integrity.
Measuring the bit-level randomness of the .rar payload to determine if the internal data is encrypted (AES-256) or merely compressed.
Technical Analysis of Encoded File Identifiers in Distributed Archiving: A Case Study of "385H85R8P58PDR85FL8DS4"
Below is a draft for a technical briefing paper investigating the nature of such file identifiers.