Possible GhostContainer Exchange Backdoor C2 Request via OWA (via webserver)

ATT&CK techniques

Persistence → C2

Recon
Resource Dev
Initial Access
Execution
Persistence
- T1505.003Web Shell
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1071.001Web Protocols
Exfiltration
Impact

What it detects

This rule detects HTTP requests to Exchange OWA carrying the custom control header and crafted VIEWSTATE prefix used by the GhostContainer backdoor. GhostContainer is an IIS/Exchange module backdoor deployed against high-value organizations in Asia. Operators tunnel commands through legitimate OWA endpoints which lets malicious traffic blend into normal Exchange usage and evade perimeter controls.

Reporting behind it

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Possible GhostContainer Exchange Backdoor C2 Request via OWA (via webserver)

Pivot detection · T1071.001 · 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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