BITS Transfer Job Download From Direct IP — Sigma Rule

Rule metadata and linked tags

Author: Nasreddine Bencherchali (Nextron Systems). Source status: test; severity: high. Source dates: 2023-01-11 / 2023-03-27.

{
  "product": "windows",
  "service": "bits-client"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: a4556020cc5c8fb0c3f43257a0bfc8eef003ce6bab0070703908fb6b87792649

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: BITS Transfer Job Download From Direct IP
id: 90f138c1-f578-4ac3-8c49-eecfd847c8b7
related:
    - id: 99c840f2-2012-46fd-9141-c761987550ef
      type: similar
status: test
description: Detects a BITS transfer job downloading file(s) from a direct IP address.
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: Nasreddine Bencherchali (Nextron Systems)
date: 2023-01-11
modified: 2023-03-27
tags:
    - attack.persistence
    - attack.execution
    - attack.stealth
    - attack.t1197
logsource:
    product: windows
    service: bits-client
detection:
    selection:
        EventID: 16403
        RemoteName|contains:
            - 'http://1'
            - 'http://2'
            - 'http://3'
            - 'http://4'
            - 'http://5'
            - 'http://6'
            - 'http://7'
            - 'http://8'
            - 'http://9'
            - 'https://1'
            - 'https://2'
            - 'https://3'
            - 'https://4'
            - 'https://5'
            - 'https://6'
            - 'https://7'
            - 'https://8'
            - 'https://9'
    filter_optional_local_networks:
        RemoteName|contains:
            - '://10.' # 10.0.0.0/8
            - '://192.168.' # 192.168.0.0/16
            - '://172.16.' # 172.16.0.0/12
            - '://172.17.'
            - '://172.18.'
            - '://172.19.'
            - '://172.20.'
            - '://172.21.'
            - '://172.22.'
            - '://172.23.'
            - '://172.24.'
            - '://172.25.'
            - '://172.26.'
            - '://172.27.'
            - '://172.28.'
            - '://172.29.'
            - '://172.30.'
            - '://172.31.'
            - '://127.' # 127.0.0.0/8
            - '://169.254.' # 169.254.0.0/16
    filter_optional_seven_zip:
        RemoteName|contains:
            # For https://7-zip.org/
            - 'https://7-'
            - 'http://7-'
    condition: selection and not 1 of filter_optional_*
falsepositives:
    - Unknown
level: high

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/