Detection rules › Sigma
Local File Read Using Curl.EXE
Detects execution of "curl.exe" with the "file://" protocol handler in order to read local files.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | No specific technique |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 1: Process creation |
Rule body
title: Local File Read Using Curl.EXE
id: aa6f6ea6-0676-40dd-b510-6e46f02d8867
status: test
description: Detects execution of "curl.exe" with the "file://" protocol handler in order to read local files.
references:
- https://curl.se/docs/manpage.html
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-07-27
tags:
- attack.execution
logsource:
product: windows
category: process_creation
detection:
selection_img:
- Image|endswith: '\curl.exe'
- OriginalFileName: 'curl.exe'
selection_cli:
CommandLine|contains: 'file:///'
condition: all of selection_*
falsepositives:
- Unknown
level: medium
regression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_curl_local_file_read/info.yml
Stages and Predicates
Stage 0: condition
all of selection_*Stage 1: selection_img
selection_img:
- Image|endswith: '\curl.exe'
- OriginalFileName: 'curl.exe'
Stage 2: selection_cli
selection_cli:
CommandLine|contains: 'file:///'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
CommandLine | match |
| field:"CommandLine" kind:match value:"file:///" |
Image | ends_with |
| field:"Image" kind:ends_with value:"\curl.exe" |
OriginalFileName | eq |
| field:"OriginalFileName" kind:eq value:"curl.exe" |