CHAIN-109 — Front Door without WAF + origin direct-exposure

Summary

Severity: High · Likelihood: Medium · Logic: ALL

Why this chain matters

Front Door WAF is disabled and the origin (App Service or VM) also accepts direct internet traffic. Attackers discover the origin IP and attack it directly, bypassing any Front Door protection entirely.

Component rules

This chain fires when its trigger conditions are met by the following rules. Click any rule to see its detection logic and compliance mappings.

Rule ID	Role
zt_net_007	Trigger
zt_net_001	Trigger

Attack walkthrough

Step 1 — DNS history lookup or certificate-transparency search for the origin IP.

Actor: Attacker
MITRE ATT&CK: T1596.003
Enabled by: zt_net_001

Attacker gain: Origin IP revealed.

Step 2 — Attack origin directly; WAF never sees the traffic.

Actor: Attacker
MITRE ATT&CK: T1190
Enabled by: zt_net_007

Attacker gain: Unprotected origin exploitation.

Blast radius

Initial access	Public origin address.
Max privilege	Full origin compromise.
Data at risk	Origin app data
Services at risk	The 'protected' app

How the logic works

The chain fires only when every rule above has at least one finding in the current scan. Missing any one rule breaks the chain — so remediating any single step disrupts the attack path.