1200KM / sigma-rule
Potential In-Memory Download And Compile Of Payloads — Sigma Rule
Sigma rule 13db8d2e-7723-4c2c-93c1-a4d36994f7ef. Potential In-Memory Download And Compile Of Payloads — Sigma Rule. Detects potential in-memory downloading and compiling of applets using curl and osacompile as seen used by XCSSET malware
Rule metadata and linked tags
Author: Sohan G (D4rkCiph3r), Red Canary (idea). Source status: test; severity: medium. Source dates: 2023-08-22 / not supplied.
{
"category": "process_creation",
"product": "macos"
}Pinned original Sigma rule · Detection Rule License 1.1
Source SHA-256: 68d652f778647a21fac8049f2c62c8d482a0d521158af1a12d3eada59e17dbd5
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: Potential In-Memory Download And Compile Of Payloads
id: 13db8d2e-7723-4c2c-93c1-a4d36994f7ef
status: test
description: Detects potential in-memory downloading and compiling of applets using curl and osacompile as seen used by XCSSET malware
references:
- https://redcanary.com/blog/mac-application-bundles/
author: Sohan G (D4rkCiph3r), Red Canary (idea)
date: 2023-08-22
tags:
- attack.command-and-control
- attack.execution
- attack.t1059.007
- attack.t1105
logsource:
category: process_creation
product: macos
detection:
selection:
CommandLine|contains|all:
- 'osacompile'
- 'curl'
condition: selection
falsepositives:
- Unknown
level: medium
False positives
- Unknown
Source references
Connected ecosystem references
Exact source-tagged techniques
Telemetry review
Read the original logsource above, then inspect the linked detection workspaces for technique-level sensor context. No per-rule telemetry equivalence is inferred.
Pinned research references. No browser attack runner, live simulation result or validated detector is asserted. Source mappings and validation limits are preserved. ATT&CK / Atomic provenance · Detection provenance.