Suspicious Cloudflared Tunnel Persistence Installed via msiexec (via process_creation)

ATT&CK techniques

C2

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1219Remote Access Tools
- T1572Protocol Tunneling
Exfiltration
Impact

What it detects

This rule detects msiexec installing the cloudflared Windows package, the covert-channel persistence step in the more_eggs TA4557 intrusion where a Cloudflare tunnel was stood up under ProgramData to reach the host without inbound firewall changes. Adversaries deploy cloudflared to proxy access over an outbound TLS tunnel, so an msiexec install of the cloudflared MSI on a server warrants investigation.

Reporting behind it

Related detections9 linkedT1572 — drag to rearrange

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Suspicious Cloudflared Tunnel Persistence Installed via msiexec (via process_creation)

Pivot detection · T1572 · 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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