Bitsadmin to Uncommon IP Server Address — Sigma Rule

Rule metadata and linked tags

Author: Florian Roth (Nextron Systems). Source status: test; severity: high. Source dates: 2022-06-10 / 2022-08-24.

{
  "category": "proxy"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 316b6452fbabffcfd474aaa00138d53ea0d4548936d13b45291989c77de999c7

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: Bitsadmin to Uncommon IP Server Address
id: 8ccd35a2-1c7c-468b-b568-ac6cdf80eec3
status: test
description: Detects Bitsadmin connections to IP addresses instead of FQDN names
references:
    - https://isc.sans.edu/diary/Microsoft+BITS+Used+to+Download+Payloads/21027
author: Florian Roth (Nextron Systems)
date: 2022-06-10
modified: 2022-08-24
tags:
    - attack.command-and-control
    - attack.execution
    - attack.stealth
    - attack.t1071.001
    - attack.persistence
    - attack.t1197
    - attack.s0190
logsource:
    category: proxy
detection:
    selection:
        c-useragent|startswith: 'Microsoft BITS/'
        cs-host|endswith:
            - '1'
            - '2'
            - '3'
            - '4'
            - '5'
            - '6'
            - '7'
            - '8'
            - '9'
    condition: selection
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://isc.sans.edu/diary/Microsoft+BITS+Used+to+Download+Payloads/21027