Possible AntSword Webshell Access on Ivanti EPMM 403.jsp
- Category
- webserver
- Author
- HuntRule
- Published
- 2026-08-11
- Updated
- 2026-08-28
ATT&CK techniques
PersistenceRecon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule detects HTTP POST requests to the 403.jsp resource on Ivanti EPMM carrying the AntSword webshell parameter k. It is tied to a Java webshell appended to the legitimate 403.jsp error page during EPMM exploitation to provide operators remote command execution. Detecting these requests reveals interaction with the deployed webshell.
Reporting behind it
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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