Detection rules › Sigma
Renamed CURL.EXE Execution
Detects the execution of a renamed "CURL.exe" binary based on the PE metadata fields
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | |
| Stealth |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 1: Process creation |
Rule body
title: Renamed CURL.EXE Execution
id: 7530cd3d-7671-43e3-b209-976966f6ea48
status: test
description: Detects the execution of a renamed "CURL.exe" binary based on the PE metadata fields
references:
- https://twitter.com/Kostastsale/status/1700965142828290260
author: X__Junior (Nextron Systems)
date: 2023-09-11
modified: 2023-10-12
tags:
- attack.execution
- attack.stealth
- attack.t1059
- attack.t1202
logsource:
category: process_creation
product: windows
detection:
selection:
- OriginalFileName: 'curl.exe'
- Description: 'The curl executable'
filter_main_img:
Image|contains: '\curl'
condition: selection and not 1 of filter_main_*
falsepositives:
- Unknown
level: medium
regression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_renamed_curl/info.yml
Stages and Predicates
Stage 0: condition
selection and not 1 of filter_main_*Stage 1: selection
selection:
- OriginalFileName: 'curl.exe'
- Description: 'The curl executable'
Stage 2: not filter_main_img
filter_main_img:
Image|contains: '\curl'
Exclusions
The rule actively suppresses these predicates.
| Field | Kind | Excluded values | Search |
|---|---|---|---|
Image | match | \curl | excludes:Image field:"Image" value:"\curl" |
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
Description | eq |
| field:"Description" kind:eq value:"The curl executable" |
OriginalFileName | eq |
| field:"OriginalFileName" kind:eq value:"curl.exe" |