| Feature | Observation | |---------|-------------| | File headers | Valid 7z signature? | | Encrypted? | Check if headers encrypted | | Archive metadata | 7z l output (list contents) | | File count | [To be filled] | | File types inside | e.g., .exe , .dll , .docm , .js , .vbs , .ps1 | | Entropy | High entropy for non‑encrypted files may suggest packing/compression |
Technical analysis utilizing system monitoring tools reveals that the emulator calls its internal command-line archive tool ( 7za.exe ) to execute, extract, and write this specific file. The background operation runs using a hardcoded extraction argument:
One scanning engine is never enough. Submit the file to services that use multiple antivirus engines: d4ac4633ebd6440fa397b84f1bc94a3c.7z
This community-tested workaround tricks NoxPlayer into thinking the file already exists, blocking it from creating a new visible one.
The file generation is frequently triggered when NoxPlayer is closed but kept running silently in the background. Open . | Feature | Observation | |---------|-------------| | File
The .7z extension can mean the file is not only compressed but also encrypted with a password. This adds to the suspicion. However, if a small program like Nox App Player creates an encrypted log file, it's likely using its own internal password, not one intended for users. A common sign of this is the password prompt but the archive contains an empty or placeholder file, a common programming practice that may confuse file archivers.
If you do not use NoxPlayer and still see this file, your system might have leftover registry entries from a previous installation. Running a targeted scan with an application like Malwarebytes will confirm that your system is fully clean and secure. The background operation runs using a hardcoded extraction
Advanced monitoring via Windows Process Monitor reveals that the file is unpacked during active runtime using a specific hardcoded argument structure: