GCP - Storage Persistence

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Storage

For more information about Cloud Storage check:

GCP - Storage Enum

storage.hmacKeys.create

You can create an HMAC to maintain persistence over a bucket. For more information about this technique check it here.

# Create key
gsutil hmac create <sa-email>

# Configure gsutil to use it
gsutil config -a

# Use it
gsutil ls gs://[BUCKET_NAME]

Another exploit script for this method can be found here.

Give Public Access

Making a bucket publicly accessible is another way to maintain access over the bucket. Check how to do it in:

GCP - Storage Post Exploitation