CHAIN-108 — Application Gateway with SSL passthrough + backend TLS off

Summary

Severity: Medium · Likelihood: Medium · Logic: ALL

Why this chain matters

App Gateway terminates TLS and sends plain HTTP to backend pools over the VNet. Any VNet-scoped adversary can sniff the internal traffic or inject responses.

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_006	Trigger
zt_net_002	Trigger

Attack walkthrough

Step 1 — Sniff backend HTTP traffic.

Actor: Adversary in VNet
MITRE ATT&CK: T1040
Enabled by: zt_net_006

Attacker gain: Session tokens, auth cookies.

Step 2 — Replay captured session cookies.

Actor: Adversary
MITRE ATT&CK: T1550.004
Enabled by: zt_net_002

Attacker gain: Impersonation of legitimate users.

Blast radius

Initial access	VNet-scoped access.
Max privilege	Session hijack.
Data at risk	Session + API traffic
Services at risk	Apps behind the gateway

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.