name: BITS Job Persistence
id: e97a5ffe-90bf-11eb-928a-acde48001122
version: 2
date: '2021-09-16'
author: Michael Haag, Splunk
status: production
type: TTP
description: The following query identifies Microsoft Background Intelligent Transfer
  Service utility `bitsadmin.exe` scheduling a BITS job to persist on an endpoint.
  The query identifies the parameters used to create, resume or add a file to a BITS
  job. Typically seen combined in a oneliner or ran in sequence. If identified, review
  the BITS job created and capture any files written to disk. It is possible for BITS
  to be used to upload files and this may require further network data analysis to
  identify. You can use `bitsadmin /list /verbose` to list out the jobs during investigation.
data_source:
- Sysmon Event ID 1
search:
  selection1:
    OriginalFileName: bitsadmin.exe
  selection2:
    Image|endswith: bitsadmin.exe
  selection3:
    CommandLine: []
  condition: (selection1 or selection2) and selection3
how_to_implement: To successfully implement this search you need to be ingesting information
  on process that include the name of the process responsible for the changes from
  your endpoints into the `Endpoint` datamodel in the `Processes` node. In addition,
  confirm the latest CIM App 4.20 or higher is installed and the latest TA for the
  endpoint product.
known_false_positives: Limited false positives will be present. Typically, applications
  will use `BitsAdmin.exe`. Any filtering should be done based on command-line arguments
  (legitimate applications) or parent process.
references:
- https://attack.mitre.org/techniques/T1197/
- https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/bitsadmin
- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1197/T1197.md#atomic-test-3---persist-download--execute
- https://lolbas-project.github.io/lolbas/Binaries/Bitsadmin/
tags:
  analytic_story:
  - BITS Jobs
  - Living Off The Land
  asset_type: Endpoint
  confidence: 80
  impact: 70
  message: An instance of $parent_process_name$ spawning $process_name$ was identified
    on endpoint $dest$ by user $user$ attempting to persist using BITS.
  mitre_attack_id:
  - T1197
  observable:
  - name: user
    type: User
    role:
    - Victim
  - name: dest
    type: Hostname
    role:
    - Victim
  - name: parent_process_name
    type: Process
    role:
    - Parent Process
  - name: process_name
    type: Process
    role:
    - Child Process
  product:
  - Splunk Enterprise
  - Splunk Enterprise Security
  - Splunk Cloud
  risk_score: 56
  security_domain: endpoint
tests:
- name: True Positive Test
  attack_data:
  - data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1197/atomic_red_team/windows-sysmon.log
    source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
    sourcetype: xmlwineventlog
- name: True Positive Test
  attack_data:
  - data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1197/atomic_red_team/crowdstrike_falcon.log
    source: crowdstrike
    sourcetype: crowdstrike:events:sensor