Progress MOVEIt File transfer folder count above threshold

let threshold = 500;
Event
| where EventID == 0 and Source == "MOVEit DMZ Audit" and EventLog == "Application"
| where RenderedDescription has_any ("Downloaded", "Uploaded")
| parse RenderedDescription with * "User '" userdisplayname "' (" *
| parse RenderedDescription with * "IPAddress: " ipaddress " FileID:" * " FileName: " filename " FolderID: " folderid " FolderPath: " folderpath " Username: " username " AgentBrand: " *
| summarize count_distinct_folderpath=dcount(folderpath), dirlist=make_set(folderpath) by Computer,userdisplayname,username,ipaddress,bin(TimeGenerated, 15m)
| where count_distinct_folderpath >= threshold
| extend DirSample = iff(array_length(dirlist) == 1, tostring(dirlist[0]), strcat("SeeDirListField","_", tostring(hash(tostring(dirlist)))))

description: |
  'Identifies Progress MOVEIt File Transfers  with distinct folder count above certain threshold in a 15min time period.
   Please note that entity mapping for arrays is not supported, so when there is a single value in an array, we will pull that value from the array as a single string to populate the entity to support entity mapping features within Sentinel. Additionally, if the array is multivalued, we will input a string to indicate this with a unique hash so that matching will not occur.'  
kind: Scheduled
tactics:
- Exfiltration
requiredDataConnectors:
- connectorId: WindowsForwardedEvents
  dataTypes:
  - WindowsEvent
incidentConfiguration:
  groupingConfiguration:
    enabled: true
    groupByEntities:
    - Account
    - Host
    reopenClosedIncident: false
    lookbackDuration: 5h
    matchingMethod: Selected
    groupByCustomDetails: []
    groupByAlertDetails: []
  createIncident: true
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Windows Forwarded Events/Analytic Rules/moveit_file_transfer_folders_above_threshold.yaml
severity: Medium
name: Progress MOVEIt File transfer folder count above threshold
customDetails:
  FilesList: dirlist
  TransferCount: count_distinct_folderpath
triggerThreshold: 0
queryPeriod: 15m
query: |
  let threshold = 500;
  Event
  | where EventID == 0 and Source == "MOVEit DMZ Audit" and EventLog == "Application"
  | where RenderedDescription has_any ("Downloaded", "Uploaded")
  | parse RenderedDescription with * "User '" userdisplayname "' (" *
  | parse RenderedDescription with * "IPAddress: " ipaddress " FileID:" * " FileName: " filename " FolderID: " folderid " FolderPath: " folderpath " Username: " username " AgentBrand: " *
  | summarize count_distinct_folderpath=dcount(folderpath), dirlist=make_set(folderpath) by Computer,userdisplayname,username,ipaddress,bin(TimeGenerated, 15m)
  | where count_distinct_folderpath >= threshold
  | extend DirSample = iff(array_length(dirlist) == 1, tostring(dirlist[0]), strcat("SeeDirListField","_", tostring(hash(tostring(dirlist)))))  
relevantTechniques:
- T1020
id: 26a993ca-0a96-45a0-8405-05a210fb98f8
queryFrequency: 15m
entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: userdisplayname
    identifier: Name
- entityType: IP
  fieldMappings:
  - columnName: ipaddress
    identifier: Address
- entityType: Host
  fieldMappings:
  - columnName: Computer
    identifier: HostName
- entityType: File
  fieldMappings:
  - columnName: DirSample
    identifier: Name
triggerOperator: gt
version: 1.0.1