Windows BITS Client Job Downloads to Suspicious Saved File Locations

title: Windows BITS Client Job Downloads to Suspicious Saved File Locations
id: 0c596630-17ca-4c46-b1be-d7ea6d0f4872
status: test
description: This rule identifies new BITS transfer jobs (EventID 16403) where the saved file path (LocalName) contains specific high-risk locations. Attackers may use BITS to stealthily download and stage payloads in common or user-visible directories to evade scrutiny and enable persistence or execution. The detection relies on Windows BITS-Client telemetry and checks the saved file path for matches to the configured suspicious substrings.
references:
  - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1197/T1197.md
  - https://github.com/SigmaHQ/sigma/blob/master/rules/windows/builtin/bits_client/win_bits_client_new_trasnfer_susp_local_folder.yml
author: Florian Roth (Nextron Systems), Huntrule Team
date: 2022-06-28
modified: 2023-03-27
tags:
  - attack.persistence
  - attack.execution
  - attack.stealth
  - attack.t1197
logsource:
  product: windows
  service: bits-client
detection:
  selection:
    EventID: 16403
    LocalName|contains:
      - \Desktop\
      - C:\Users\Public\
      - C:\PerfLogs\
  condition: selection
falsepositives:
  - Unknown
level: high
license: DRL-1.1
related:
  - id: f8a56cb7-a363-44ed-a82f-5926bb44cd05
    type: derived