Detection rules › Kusto
ApexOne - Suspicious commandline arguments
'Detects suspicious commandline arguments.'
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | T1059 Command and Scripting Interpreter |
Rule body kusto
id: 4d7199b2-67b8-11ec-90d6-0242ac120003
name: ApexOne - Suspicious commandline arguments
description: |
'Detects suspicious commandline arguments.'
severity: High
status: Available
requiredDataConnectors:
- connectorId: CefAma
dataTypes:
- CommonSecurityLog
queryFrequency: 1h
queryPeriod: 1h
triggerOperator: gt
triggerThreshold: 0
tactics:
- Execution
relevantTechniques:
- T1059
query: |
TMApexOneEvent
| where EventMessage has "Endpoint Application"
| where Command has_any ("whoami", "dpkg", "useradd", "sudo")
| 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 "Endpoint Application"
Stage 3: where
| where Command has_any ("whoami", "dpkg", "useradd", "sudo")
Stage 4: extend
| extend IPCustomEntity = SrcIpAddr, AccountCustomEntity = DstUserName
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
Command | match |
|
EventMessage | match |
|
Output fields
Fields the rule emits when it matches. Chronicle authors list these in the outcome block; they appear on the detection and $risk_score drives alerting. Sentinel / Defender XDR rules build them up through project / summarize / extend stages. Sentinel maps these into alert fields via entityMappings and customDetails; Defender XDR custom detections surface them as alert fields directly.
| Field | Source |
|---|---|
AccountCustomEntity | extend |
IPCustomEntity | extend |