Arbitrary File Download Via IMEWDBLD.EXE — Sigma Rule

Rule metadata and linked tags

Author: Swachchhanda Shrawan Poudel. Source status: test; severity: high. Source dates: 2023-11-09 / not supplied.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 3fe7cc7cec558655dd44b96ab610d64d76702b4e96e16446d4729905a7b64fd6

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: Arbitrary File Download Via IMEWDBLD.EXE
id: 863218bd-c7d0-4c52-80cd-0a96c09f54af
related:
    - id: 8d7e392e-9b28-49e1-831d-5949c6281228
      type: derived
status: test
description: Detects usage of "IMEWDBLD.exe" to download arbitrary files
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1105/T1105.md#atomic-test-10---windows---powershell-download
    - https://lolbas-project.github.io/lolbas/Binaries/IMEWDBLD/
author: Swachchhanda Shrawan Poudel
date: 2023-11-09
tags:
    - attack.execution
    - attack.stealth
    - attack.t1218
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\IMEWDBLD.exe'
        - OriginalFileName: 'imewdbld.exe'
    selection_cli:
        CommandLine|contains:
            - 'http://'
            - 'https://'
    condition: all of selection_*
falsepositives:
    - Unknown
# Note: Please reduce this to medium if you find legitimate use case of this utility with a URL
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1105/T1105.md#atomic-test-10---windows---powershell-download
• https://lolbas-project.github.io/lolbas/Binaries/IMEWDBLD/