The Cloud Security Report is designed to highlight risks and suspicious activity across connected cloud environments, with a strong focus on indicators consistent with account takeover (ATO) (B). In Proofpoint cloud-connected contexts (e.g., cloud email and SaaS integrations), ATO manifests through patterns such as unusual sign-in behavior, suspicious mailbox activity, anomalous sending, unexpected forwarding rules, OAuth application consents, and risky access from new locations/devices. For IR, this is critical because modern phishing frequently targets credentials and sessions rather than delivering executable malware, and compromised cloud identities enable fast lateral movement through internal phishing, invoice fraud, and data access. Proofpoint reporting helps analysts identify which users and accounts show the strongest compromise signals so they can prioritize containment: force password reset, revoke refresh tokens/sessions, remove malicious inbox rules and forwarding, disable suspicious OAuth grants, and validate MFA posture. While ransomware, insider risk, and BEC can be related outcomes, the Cloud Security Report’s connected-environment emphasis is on identity compromise signals and cloud account misuse—core ATO detection and investigation drivers.