1Password - Vault export post account creation

Severity: medium
Time window: 14d
Group by: userUuid
Source: github.com/Azure/Azure-Sentinel

This will alert when a successful vault export has occurred within 14 days of a new account being created within 1Password. Ref: https://1password.com/ Ref: https://github.com/securehats/

MITRE ATT&CK coverage

Tactic	Techniques
Persistence	`T1136` Create Account
Credential Access	`T1555` Credentials from Password Stores

Telemetry coverage

Platform	Record / event type
1Password	export
1Password	any: Sign-in attempt (catch-all)
1Password	vault-export: Export Vault

Rule body

id: 969e2e5c-9cc6-423c-a3de-514f7ad75fe7
name: 1Password - Vault export post account creation
version: 1.0.0
kind: Scheduled
description: |-
  This will alert when a successful vault export has occurred within 14 days of a new account being created within 1Password.

  Ref: https://1password.com/
  Ref: https://github.com/securehats/
severity: Medium
requiredDataConnectors:
  - connectorId: 1Password
    dataTypes:
      - OnePasswordEventLogs_CL
queryFrequency: 1h
queryPeriod: 14d
triggerOperator: gt
triggerThreshold: 0
tactics:
- CredentialAccess
- Persistence
relevantTechniques:
- T1555
- T1136
query: |-
  let ruleFrequency = 1h;
  let lookback = 14d;
  let onePasswordUserCreationCheck =
      OnePasswordEventLogs_CL
      | where TimeGenerated between (ago(lookback) .. ago(now() - ago(ruleFrequency)))
      | extend creationActivityFound = iff(action == "activate" and object_type == "user", bool(1), bool(0))
  ;
  OnePasswordEventLogs_CL
  | where action == "export" and object_type == "vault"
  | extend userUuid = tostring(actor_details.uuid)
  | join (
      onePasswordUserCreationCheck
      | where creationActivityFound == true
      | extend userUuid = tostring(object_details.uuid)
      )
      on $left.userUuid == $right.userUuid
  | extend
      TargetUsername = object_details1.email
      , SrcIpAddr = session1.ip_address
entityMappings:
- entityType: Account
  fieldMappings:
  - identifier: FullName
    columnName: TargetUsername
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: SrcIpAddr
suppressionEnabled: false
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    enabled: true
    reopenClosedIncident: false
    lookbackDuration: 1h
    matchingMethod: AllEntities
suppressionDuration: 5h
eventGroupingSettings:
  aggregationKind: SingleAlert

Stages and Predicates

Parameters

let ruleFrequency = 1h;
let lookback = 14d;

Let binding: `onePasswordUserCreationCheck` used in Stage 4

let onePasswordUserCreationCheck = OnePasswordEventLogs_CL
    | where TimeGenerated between (ago(lookback) .. ago(now() - ago(ruleFrequency)))
    | extend creationActivityFound = iff(action == "activate" and object_type == "user", bool(1), bool(0));

Stage 1: `source`

OnePasswordEventLogs_CL

Stage 2: `where`

| where action == "export" and object_type == "vault"

Stage 3: `extend`

| extend userUuid = tostring(actor_details.uuid)

Stage 4: `join`

| join (
    onePasswordUserCreationCheck
    | where creationActivityFound == true
    | extend userUuid = tostring(object_details.uuid)
    )
    on $left.userUuid == $right.userUuid

Stage 5: `extend`

| extend
    TargetUsername = object_details1.email
    , SrcIpAddr = session1.ip_address

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`action`	eq	`export`	`field:"action" kind:eq value:"export"`
`creationActivityFound`	eq	`true`	`field:"creationActivityFound" kind:eq value:"true"`
`object_type`	eq	`vault`	`field:"object_type" kind:eq value:"vault"`

Output fields

These fields are emitted when the rule matches.

Field	Source
`userUuid`	`extend`
`SrcIpAddr`	`extend`
`TargetUsername`	`extend`