Suspicious Nmap Scanner Probe URIs in HTTP Requests (via webserver)

PremiumReviewedSigma · Medium · v1
Category
webserver
Author
HuntRule
Published
2026-09-16
Updated
2026-09-16

ATT&CK techniques

Recon → Discovery
  1. Resource Dev

  2. Initial Access

  3. Execution

  4. Persistence

  5. Priv Esc

  6. Defense Evasion

  7. Cred Access

  8. Lateral Movement

  9. Collection

  10. C2

  11. Exfiltration

  12. Impact

What it detects

This rule detects HTTP requests to characteristic Nmap probe paths used by NSE scripts to fingerprint web servers and Hadoop or application endpoints. Requests for these signature URIs indicate automated scanning and service discovery against exposed infrastructure. Catching the probe paths reveals reconnaissance even when the scanner user-agent has been altered.

Related detections9 linkedT1046 — drag to rearrange
Malicious NetExec SMB Enumeration Execution (via process_creation)
Possible Out-Of-Band Interaction via requestrepo via DNS (via dns_query)
Possible Interactsh Out-Of-Band Interaction via DNS (via dns_query)
Malicious WordPress Core SQL Injection Scanner via User-Agent
Suspicious Advanced IP Scanner Execution for Network Discovery
Suspicious masscan Scanning Docker API Port 2375
Suspicious Network Reconnaissance via Advanced Port Scanner
Suspicious SonicWall Access With Anomalous Chrome Linux User Agent via Webserver
Suspicious BeyondTrust Remote Support Probing of nw Endpoint via Webserver
Suspicious Nmap Scanner Probe URIs in HTTP Requests (via webserver)
Pivot detection · T1046 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.