Managed Sentinel – Alert 231
| Alert ID | MS-A231 |
| Alert Name | Connections to malicious IPs from internal hosts |
| Description | This will alert when a connection from an internal host to an Internet malicious IP address is detected. This alert is using a correlation with Windows AD |
| Severity Level | Low |
| Threat Indicator | Compromised Host |
| MITRE ATT&CK Tactics | Initial Access |
| Log sources | Firewalls |
| False Positive | Browsers Adware Incorrect Threat Intelligence feed |
| Recommendations | 1. Investigate the type of traffic allowed to the malicious IP address (e.g web, dns, smtp). 2. Manually perform a validation of the malicious IP address on external Threat Intell sources (e.g www.abuseIPdb.com). 3. Identify the number of requests within a specific period of time which could be an solid indicator of a compromised host. 4. Perform a AV/AM scan for the affected internal machine 5. Complete a Sentinel investigation for the same entity (IP address or user account) to understand if any other lateral attacks were completed while connecting to VPN to corporate network |