File Observables with no Hash Create their own Hash

[securitiz]

Description

When creating a file observable with no hashes (for example, with only the file name property filled in), OpenCTI hashes the filename itself and displays it as the hash of the file. This is a mistake, as the hash could be misconstrued to be the hash of the actual file.

Environment

1. OS (where OpenCTI server runs): Ubuntu 20.04
2. OpenCTI version: 4.1.1
3. OpenCTI client: frontend
4. Other environment details:

Reproducible Steps

Steps to create the smallest reproducible scenario:

1. Create new File observable
2. Set the observable's value to be "test.txt"
3. Leave the hash values as empty
4. Create object

Expected Output

A file observable is created, with empty hash values, and the object's name is "test.txt"

Actual Output

A file observable is created, with the MD5 hash value set to "dd18bf3a8e0a2a3e53e2661c7fb53534". This is the hash of the string "test.txt".

Additional information