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Merge PR SigmaHQ#4773 from @DefenderDaniel - Add rules covering Nscur…
…l usage new: File Download Via Nscurl - MacOS --------- Co-authored-by: nasbench <[email protected]>
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rules/macos/process_creation/proc_creation_macos_nscurl_usage.yml
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title: File Download Via Nscurl - MacOS | ||
id: 6d8a7cf1-8085-423b-b87d-7e880faabbdf | ||
status: experimental | ||
description: Detects the execution of the nscurl utility in order to download files. | ||
references: | ||
- https://www.loobins.io/binaries/nscurl/ | ||
- https://www.agnosticdev.com/content/how-diagnose-app-transport-security-issues-using-nscurl-and-openssl | ||
- https://gist.github.com/nasbench/ca6ef95db04ae04ffd1e0b1ce709cadd | ||
author: Daniel Cortez | ||
date: 2024/06/04 | ||
tags: | ||
- attack.defense_evasion | ||
- attack.command_and_control | ||
- attack.t1105 | ||
logsource: | ||
category: process_creation | ||
product: macos | ||
detection: | ||
selection: | ||
Image|endswith: '/nscurl' | ||
CommandLine|contains: | ||
- '--download ' | ||
- '--download-directory ' | ||
- '--output ' | ||
- '-dir ' | ||
- '-dl ' | ||
- '-ld' | ||
- '-o ' | ||
condition: selection | ||
falsepositives: | ||
- Legitimate usage of nscurl by administrators and users. | ||
level: medium |