Renamed CURL.EXE Execution

testmedium

log source: windows · process_creationauthor X__Junior (Nextron Systems)date 2023-09-11

description

What this is, in brief.

Detects the execution of a renamed "CURL.exe" binary based on the PE metadata fields

rule source (YAML)

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

detects techniques (2)

ATT&CK techniques this enables or maps to.

references

External citations — patches, advisories, analysis.

https://twitter.com/Kostastsale/status/1700965142828290260