Malicious XE Group thump.aspx Webshell Interaction via File Directory Parameters (via webserver)

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 requests to the XE Group .thump.aspx webshell that carry the file-listing and file-read parameters the operator uses to browse and exfiltrate server files. The hidden-prefixed ASPX name combined with these directory parameters distinguishes webshell tasking from normal application traffic.

Reporting behind it

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Malicious XE Group thump.aspx Webshell Interaction via File Directory Parameters (via webserver)

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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