File Download Via Bitsadmin — Sigma Rule

Rule metadata and linked tags

Author: Michael Haag, FPT.EagleEye. Source status: test; severity: medium. Source dates: 2017-03-09 / 2023-02-15.

{
  "category": "process_creation",
  "product": "windows"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 26747eb1e298fb9243b12057545424ea3a51733c1dc9dc03dcbb2e32339e70bc

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: File Download Via Bitsadmin
id: d059842b-6b9d-4ed1-b5c3-5b89143c6ede
status: test
description: Detects usage of bitsadmin downloading a file
references:
    - https://blog.netspi.com/15-ways-to-download-a-file/#bitsadmin
    - https://isc.sans.edu/diary/22264
    - https://lolbas-project.github.io/lolbas/Binaries/Bitsadmin/
author: Michael Haag, FPT.EagleEye
date: 2017-03-09
modified: 2023-02-15
tags:
    - attack.persistence
    - attack.execution
    - attack.stealth
    - attack.t1197
    - attack.s0190
    - attack.t1036.003
    - attack.command-and-control
    - attack.t1105
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\bitsadmin.exe'
        - OriginalFileName: 'bitsadmin.exe'
    selection_cmd:
        CommandLine|contains: ' /transfer '
    selection_cli_1:
        CommandLine|contains:
            - ' /create '
            - ' /addfile '
    selection_cli_2:
        CommandLine|contains: 'http'
    condition: selection_img and (selection_cmd or all of selection_cli_*)
falsepositives:
    - Some legitimate apps use this, but limited.
level: medium
regression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_bitsadmin_download/info.yml
simulation:
    - type: atomic-red-team
      name: Windows - BITSAdmin BITS Download
      technique: T1105
      atomic_guid: a1921cd3-9a2d-47d5-a891-f1d0f2a7a31b

Original YAML and metadata in JSON

False positives

• Some legitimate apps use this, but limited.

Source references

• https://blog.netspi.com/15-ways-to-download-a-file/#bitsadmin
• https://isc.sans.edu/diary/22264
• https://lolbas-project.github.io/lolbas/Binaries/Bitsadmin/