Rules: Internal Port Scan
This rule detects port scanning activity from one internal IP address to another, possibly indicating an attacker enumerating the network for lateral movement.
| Detail | Value |
|---|---|
| Type | Threshold |
| Category | Discovery |
| Apply Risk to Entities | srcDevice_ip, srcDevice_hostname, user_username |
| Signal Name | Internal Port Scan |
| Summary Expression | Internal port scan from IP: {{srcDevice_ip}} |
| Threshold Count | 20 |
| Threshold Window | 5m |
| Score/Severity | Static: 1 |
| Enabled by Default | False |
| Prototype | False |
| Tags | _mitreAttackTactic:TA0043, _mitreAttackTechnique:T1595, _mitreAttackTechnique:T1046, _mitreAttackTechnique:T1595.001 |
- CheckPoint - Firewall and VPN
- CheckPoint - SmartDefense
- CheckPoint - URL Filtering
- Cisco Systems - ASA
- Cisco Systems - Firepower
- Cisco Systems - Meraki
- CrowdStrike - FDR
- Dell - Firewall
- Google - Google Cloud Platform
- IBM - Guardium
- Linux - Linux OS Syslog
- Microsoft - Windows
- Palo Alto Networks - Next Generation Firewall
- Sophos - UTM 9
- Zscaler - Firewall
| Origin | Field |
|---|---|
| Normalized Schema | dstDevice_ip_isInternal |
| Normalized Schema | dstPort |
| Normalized Schema | listMatches |
| Normalized Schema | objectType |
| Normalized Schema | srcDevice_hostname |
| Normalized Schema | srcDevice_ip |
| Normalized Schema | srcDevice_ip_isInternal |
| Normalized Schema | user_username |