Managed Sentinel – Alert 112

Alert IDMS-A112
Alert NameBlocked outbound traffic to blacklisted IPs or domains (Threat Intelligence)
DescriptionThis alert triggers when an internal critical machine successfully connect to a malicious IP address or domain based on Managed Sentinel Threat Intelligence list.

Customer to provide a list of critical servers.
Severity LevelLow
Threat IndicatorCompromised Host
MITRE ATT&CK TacticsInitial Access
Defense Evasion
Log sourcesFirewalls
False PositiveIncorrect Threat Intelligence feed
RecommendationsInvestigate the type of traffic allowed to the malicious IP address (e.g web, dns, smtp). Manually perform a validation of the malicious IP address on external Threat Intelligence sources (e.g www.abuseIPdb.com).
Also the volume of requests within a specific period of time could be an solid indicator of a compromised host.