1Password - Manual account creation

Severity: medium
Time window: 5m
Source: github.com/Azure/Azure-Sentinel

This will alert when a new account was created manually within 1Password. This should only be used when a 1Password integration via a SCIM Bridge has been implemented. Ref: https://support.1password.com/scim/ Ref: https://1password.com/ Ref: https://github.com/securehats/

MITRE ATT&CK coverage

Tactic	Techniques
Persistence	`T1136` Create Account

Telemetry coverage

Platform	Record / event type
1Password	invite-create: Create Invite
1Password	any: Item usage (catch-all)
1Password	any: Sign-in attempt (catch-all)

Rule body

id: 9a264487-bcb8-4c7f-a461-b289a46377b8
name: 1Password - Manual account creation
version: 1.0.0
kind: Scheduled
description: |-
  This will alert when a new account was created manually within 1Password. This should only be used when a 1Password integration via a SCIM Bridge has been implemented.

  Ref: https://support.1password.com/scim/
  Ref: https://1password.com/
  Ref: https://github.com/securehats/
severity: Medium
requiredDataConnectors:
  - connectorId: 1Password
    dataTypes:
      - OnePasswordEventLogs_CL
queryFrequency: 5m
queryPeriod: 5m
triggerOperator: gt
triggerThreshold: 0
tactics:
- Persistence
relevantTechniques:
- T1136
query: |-
  OnePasswordEventLogs_CL
  | where action == "create"
  | where object_type == "invite"
  | where actor_details.email !endswith "@1passwordserviceaccounts.com"
  | extend
      ActorUsername = actor_details.email
      , SrcIpAddr = session.ip
      , TargetUsername = aux_info
suppressionEnabled: false
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    enabled: true
    reopenClosedIncident: false
    lookbackDuration: 1h
    matchingMethod: AnyAlert
suppressionDuration: 1h
eventGroupingSettings:
  aggregationKind: SingleAlert
entityMappings:
- entityType: Account
  fieldMappings:
  - identifier: FullName
    columnName: ActorUsername
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: SrcIpAddr
- entityType: Account
  fieldMappings:
  - identifier: FullName
    columnName: TargetUsername

Stages and Predicates

Stage 1: `source`

OnePasswordEventLogs_CL

Stage 2: `where`

| where action == "create"

Stage 3: `where`

| where object_type == "invite"

Stage 4: `where`

| where actor_details.email !endswith "@1passwordserviceaccounts.com"

Stage 5: `extend`

| extend
    ActorUsername = actor_details.email
    , SrcIpAddr = session.ip
    , TargetUsername = aux_info

Exclusions

The rule actively suppresses these predicates.

Field	Kind	Excluded values	Search
`email`	ends_with	`@1passwordserviceaccounts.com`	`excludes:email` `field:"email" value:"@1passwordserviceaccounts.com"`

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`action`	eq	`create`	`field:"action" kind:eq value:"create"`
`object_type`	eq	`invite`	`field:"object_type" kind:eq value:"invite"`

Output fields

These fields are emitted when the rule matches.

Field	Source
`ActorUsername`	`extend`
`SrcIpAddr`	`extend`
`TargetUsername`	`extend`