MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Command & Control |
Rule body
id: 9e3dc038-67b7-11ec-90d6-0242ac120003
name: ApexOne - Suspicious connections
description: |
'Detects suspicious connections.'
severity: High
status: Available
requiredDataConnectors:
- connectorId: CefAma
dataTypes:
- CommonSecurityLog
queryFrequency: 1h
queryPeriod: 1h
triggerOperator: gt
triggerThreshold: 0
tactics:
- CommandAndControl
relevantTechniques:
- T1102
query: |
TMApexOneEvent
| where EventMessage has "Suspicious Connection"
| where NetworkDirection == 1
| where DvcAction in ('1', '3')
| extend IPCustomEntity = SrcIpAddr, AccountCustomEntity = DstUserName
entityMappings:
- entityType: IP
fieldMappings:
- identifier: Address
columnName: IPCustomEntity
- entityType: Account
fieldMappings:
- identifier: Name
columnName: AccountCustomEntity
version: 1.0.3
kind: Scheduled
Stages and Predicates
Stage 1: source
TMApexOneEvent
Stage 2: where
| where EventMessage has "Suspicious Connection"
Stage 3: where
| where NetworkDirection == 1
Stage 4: where
| where DvcAction in ('1', '3')
Stage 5: extend
| extend IPCustomEntity = SrcIpAddr, AccountCustomEntity = DstUserName
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
DvcAction | in |
| field:"DvcAction" kind:in |
EventMessage | match |
| field:"EventMessage" kind:match value:"Suspicious Connection" |
NetworkDirection | eq |
| field:"NetworkDirection" kind:eq value:"1" |
Output fields
These fields are emitted when the rule matches.
| Field | Source |
|---|---|
AccountCustomEntity | extend |
IPCustomEntity | extend |