Bitsadmin Activity

id: 2458e226-76e6-458c-8bf7-8766cc993b82
name: Bitsadmin Activity
description: |
  Background Intelligent Transfer Service (BITS) is a way to reliably download files from webservers or SMB servers. 
  This service is commonly used for legitimate purposes, but can also be used as part of a malware downloader. 
  Additionally, bitsadmin can be used to upload files and therefore can be used for data exfiltration. This
  query will identify use of bitsadmin.exe for either purpose and will identify directionality file transfer
  directionality.
tactics: 
- Persistence
- CommandAndControl
- Exfiltration
requiredDataConnectors:
- connectorId: MicrosoftThreatProtection
  dataTypes:
  - DeviceProcessEvents
query: |
  DeviceProcessEvents
  | where 
      (FileName =~ "bitsadmin.exe" or column_ifexists('ProcessVersionInfoOriginalFileName','ColumnNotAvailable') =~ 'bitsadmin.exe')
      and ProcessCommandLine has_any ('/Transfer','/AddFile', '/AddFileSet','/AddFileWithRanges')
  | extend 
      ParsedCommandLine = parse_command_line(ProcessCommandLine,'windows')
  | extend     
      RemoteUrl = tostring(ParsedCommandLine[-2]),
      LocalFile= tostring(ParsedCommandLine[-1]),
      Direction = iff(ProcessCommandLine has "/Upload", 'Upload', 'Download')
  | project-reorder 
      Timestamp,
      DeviceId,
      DeviceName,
      Direction,
      RemoteUrl,
      LocalFile,
      InitiatingProcessFolderPath,
      InitiatingProcessAccountDomain,
      InitiatingProcessAccountName,
      InitiatingProcessSHA256,
      ProcessCommandLine