Suspicious Webshell Deployment in DNN DesktopModules Directory

ATT&CK techniques

Persistence

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

What it detects

This rule detects creation of ASP.NET handler (.ashx) files inside the DotNetNuke DesktopModules directory, a webshell staging location used by the FamousSparrow group for initial access and persistence on IIS servers. Web-facing handler files written into CMS module folders commonly represent server-side backdoors enabling remote command execution.

Reporting behind it

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Suspicious Webshell Deployment in DNN DesktopModules Directory

Pivot detection · T1505.003 · 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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