EcoEarth Inc.

Explanation (first response priorities):

First responders prioritize containment and preservation: stop ongoing harm while protecting evidence. The scenario suggests active misuse (dormant accounts modifying data) and possible exfiltration (encrypted transmissions). The quickest way to prevent further manipulation/leakage is isolating affected services/segments—reducing attacker access paths and limiting spread. This also prevents additional data corruption while investigators capture logs, account activity, and network traces.

(A) decrypting traffic is not a first responder priority; it may be impossible (TLS/unknown keys) and consumes time while damage continues. (B) external notification can be necessary later, but premature partner notification can create panic and doesn’t stop the incident. (C) rollback is a recovery step and can destroy forensic context or reintroduce compromised states if you haven’t validated backup integrity; it also doesn’t address how access happened or stop current attacker sessions unless paired with containment.

Therefore, (D) best matches initial response doctrine: contain first, preserve evidence, then analyze and recover.