Suspicious Download From Direct IP Via Bitsadmin — Sigma Rule

Rule metadata and linked tags

Author: Florian Roth (Nextron Systems). Source status: test; severity: high. Source dates: 2022-06-28 / 2023-02-15.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: cf011568f1710dd2269ef1c89c6404fb4cda75cb60575b31d607c3af38e04d1c

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: Suspicious Download From Direct IP Via Bitsadmin
id: 99c840f2-2012-46fd-9141-c761987550ef
related:
    - id: 90f138c1-f578-4ac3-8c49-eecfd847c8b7
      type: similar
status: test
description: Detects usage of bitsadmin downloading a file using an URL that contains an IP
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/
    - https://blog.talosintelligence.com/breaking-the-silence-recent-truebot-activity/
author: Florian Roth (Nextron Systems)
date: 2022-06-28
modified: 2023-02-15
tags:
    - attack.persistence
    - attack.execution
    - attack.stealth
    - attack.t1197
    - attack.s0190
    - attack.t1036.003
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\bitsadmin.exe'
        - OriginalFileName: 'bitsadmin.exe'
    selection_flags:
        CommandLine|contains:
            - ' /transfer '
            - ' /create '
            - ' /addfile '
    selection_extension:
        CommandLine|contains:
            - '://1'
            - '://2'
            - '://3'
            - '://4'
            - '://5'
            - '://6'
            - '://7'
            - '://8'
            - '://9'
    filter_seven_zip:
        CommandLine|contains: '://7-' # For https://7-zip.org/
    condition: all of selection_* and not 1 of filter_*
falsepositives:
    - Unknown
level: high
regression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_bitsadmin_download_direct_ip/info.yml

Original YAML and metadata in JSON

False positives

• Unknown

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/
• https://blog.talosintelligence.com/breaking-the-silence-recent-truebot-activity/