User Email Submissions (FN) - Top Intra-Org P2 Senders

id: 2adae71b-42b9-47b8-9cb7-ccea9fece3e2
name: User Email Submissions (FN) - Top Intra-Org P2 Senders
description: |
  This query visualises top sender email addresses of intra-org emails submitted as false negatives by users.
description-detailed: |
  This query visualises top sender email addresses of intra-org emails submitted as false negatives by users.
  Query is also included as part of the Defender for Office 365 solution in Sentinel: https://techcommunity.microsoft.com/blog/microsoftdefenderforoffice365blog/part-2-build-custom-email-security-reports-and-dashboards-with-workbooks-in-micr/4411303
requiredDataConnectors:
- connectorId: MicrosoftThreatProtection
  dataTypes:
  - CloudAppEvents
  - EmailEvents
tactics:
  - InitialAccess
relevantTechniques:
  - T1566
query: |
  CloudAppEvents 
  | where ActionType == "UserSubmission"
  | extend SubmissionType = tostring((parse_json(RawEventData)).SubmissionType),SubmissionContentType=tostring((parse_json(RawEventData)).SubmissionContentType), RecipientObjectId=AccountObjectId
  | extend User_SubmissionType=
  iff(SubmissionType == "1" and ActionType == "UserSubmission" and SubmissionContentType=="Mail","User_Phish_FN",
  iff(SubmissionType == "0" and ActionType == "UserSubmission" and SubmissionContentType=="Mail","User_Spam_FN","Other")),
  NetworkMessageId=tostring((parse_json(RawEventData).ObjectId))
  | where SubmissionContentType == "Mail" and SubmissionType in ("1","0")
  | join EmailEvents on NetworkMessageId, RecipientObjectId
  | where EmailDirection == "Intra-org"
  | summarize count() by SenderMailFromAddress
  | project SenderMailFromAddress,UserSubmissions = count_
  | top 10 by UserSubmissions desc
version: 1.0.0