Malicious Azure WireServer Access Impersonating WALinuxAgent (via process_creation)

ATT&CK techniques

Cred Access

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
- T1552.005Cloud Instance Metadata API
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects a process contacting the Azure WireServer host address while presenting the WALinuxAgent identity, a technique used in the ChaosDB walkthrough to steal certificates and goal-state data. A non-agent process impersonating the Linux guest agent to reach WireServer is a strong sign of credential theft. Legitimate agent traffic originates from the agent binary itself, not ad-hoc curl commands.

Reporting behind it

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Malicious Azure WireServer Access Impersonating WALinuxAgent (via process_creation)

Pivot detection · T1552.005 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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