Same IP address with multiple csUserAgent

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This alerts when a client IP connects with 1-15 different useragents in less than 1 hour. Limited to 50 or less connections to avoid high traffic. May indicate malicious activity as a probing method.

Attribute Value
Type Hunting Query
Solution Standalone Content
ID 4edbb420-2df7-4089-9906-c335f065803e
Tactics InitialAccess
Techniques T1190
Required Connectors AzureMonitor(IIS)
Source [View on GitHub](https://github.com/Azure/Azure-Sentinel/blob/master/Hunting Queries/W3CIISLog/ClientIPwithManyUserAgents.yaml)

Tables Used

This content item queries data from the following tables:

Table Selection Criteria Transformations Ingestion API Lake-Only
W3CIISLog cIP != "::1"
cIP !startswith "127."
cIP !startswith "192.168."
cIP !startswith "::"
cIP !startswith "fe80"
scStatus !startswith "20"
scStatus !startswith "30"
✓ ✗ ✗

Associated Connectors

The following connectors provide data for this content item:

Connector Solution
ESI-Opt5ExchangeIISLogs Microsoft Exchange Security - Exchange On-Premises

Solutions: Microsoft Exchange Security - Exchange On-Premises


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