Malicious Dynamicweb Unauthenticated Administrator Creation via Setup Default.aspx (via webserver)

ATT&CK techniques

Initial Access → Persistence

Recon
Resource Dev
Initial Access
- T1190Exploit Public-Facing Application
Execution
Persistence
- T1136.001Local Account
- T1505.003Web Shell
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects requests to the Dynamicweb Access Setup Default.aspx page invoking the createadministrator action with adminusername and adminpassword parameters. This logic flaw in Dynamicweb 9.5.0 through 9.12.7 lets an unauthenticated attacker create an administrator account and then upload an ASPX webshell for RCE. Detecting it surfaces account creation abuse leading to full server compromise.

Reporting behind it

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Malicious Dynamicweb Unauthenticated Administrator Creation via Setup Default.aspx (via webserver)

Pivot detection · T1190 · 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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