AI Cyber Defense / Endpoint, lateral movement and ransomware defense
AI Cyber Defense: Constrain SMB reachability and signing assumptions
Limit SMB to required peer relationships, remove broad write access and enforce supported signing or encryption policies according to workload compatibility.
Environment and inputs: Managed Windows and Linux endpoints, EDR telemetry, remote administration, file services and protected recovery systems.
Scenario and goal
A writable share or weak remote-access boundary can support lateral movement even when file transport is encrypted.
Why it matters
For this scenario, expect an attacker to vary scripts and executable packaging while reusing valid accounts and ordinary administration channels. The useful evidence is the relationship between the process, identity, destination and authorized task. A signed binary can perform an unauthorized action, and a new hash does not necessarily represent a new behavior. Protect credentials and administration boundaries alongside execution controls.
Evidence to collect
Review share ACLs, filesystem permissions, remote logon records and negotiated security properties where the platform exposes them.
Validate with an authorized exercise
Use test users to verify read, write and denied access separately; confirm an unapproved source cannot reach the share and signing requirements are actually negotiated.
Rollout and checks
Establish approved maintenance examples before enabling enforcement and verify event collection from the affected host class. Preserve essential recovery connectivity and define the consequence of an isolation or policy failure. After remediation, verify both the original access boundary and any credentials or automation that could recreate the condition. Rebuilding a host alone does not validate those dependencies.
Scope and limits
This guide proposes a defensive test; it is not a tested production design. Check platform support and local requirements. References explain the mechanisms but do not certify the design. Behavior alone does not prove AI involvement.