iboss - Command-and-Control Detected

Status: available
Severity: high
Time window: 1h
Source: github.com/Azure/Azure-Sentinel

Identifies web traffic where the iboss platform flagged command-and-control (C2) activity. A populated CNCDetected flag indicates the gateway observed communication to a known or suspected C2 destination. Surfaces the user, destination URL, and host to support triage of potentially compromised endpoints.

MITRE ATT&CK coverage

Tactic	Techniques
Command & Control	`T1071` Application Layer Protocol

Rule body

id: 40cf9670-d4be-4149-9082-5809a2b12ca1
name: iboss - Command-and-Control Detected
description: |
  Identifies web traffic where the iboss platform flagged command-and-control (C2) activity. A populated CNCDetected flag indicates the gateway observed communication to a known or suspected C2 destination. Surfaces the user, destination URL, and host to support triage of potentially compromised endpoints.
severity: High
status: Available
requiredDataConnectors:
  - connectorId: ibossAma
    dataTypes:
      - CommonSecurityLog
queryFrequency: 1h
queryPeriod: 1h
triggerOperator: gt
triggerThreshold: 0
tactics:
  - CommandAndControl
relevantTechniques:
  - T1071
query: |
  ibossUrlEvent
  | where CNCDetected == 1
  | project EventTime, SrcUsername, Url, Domain, SrcIpAddr, DstIpAddr, DstPortNumber, DvcAction, UrlCategory, HttpUserAgent
entityMappings:
  - entityType: Account
    fieldMappings:
      - identifier: FullName
        columnName: SrcUsername
  - entityType: IP
    fieldMappings:
      - identifier: Address
        columnName: SrcIpAddr
  - entityType: URL
    fieldMappings:
      - identifier: Url
        columnName: Url
version: 1.0.0
kind: Scheduled

Stages and Predicates

Stage 1: `source`

ibossUrlEvent

Stage 2: `where`

| where CNCDetected == 1

Stage 3: `project`

| project EventTime, SrcUsername, Url, Domain, SrcIpAddr, DstIpAddr, DstPortNumber, DvcAction, UrlCategory, HttpUserAgent

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`CNCDetected`	eq	`1`	`field:"CNCDetected" kind:eq value:"1"`

Output fields

These fields are emitted when the rule matches.

Field	Source
`Domain`	`project`
`DstIpAddr`	`project`
`DstPortNumber`	`project`
`DvcAction`	`project`
`EventTime`	`project`
`HttpUserAgent`	`project`
`SrcIpAddr`	`project`
`SrcUsername`	`project`
`Url`	`project`
`UrlCategory`	`project`