In-memory Downloading and Compiling of Applets as Payloads

 1title: In-memory Downloading and Compiling of Applets as Payloads
 2id: 75933b00-4949-4cf0-a0e0-f234c3ff1407
 3status: experimental
 4description: |
 5    This analytic uses a single ES_EVENT_TYPE_NOTIFY_EXEC event and looks for 
 6    the the execution of curl, |, or osacompile commands. Part of the RedCanary 
 7    2024 Threat Detection Report.    
 8references:
 9    - https://redcanary.com/threat-detection-report/techniques/applescript/
10author: RedCanary, Sigma formatting by Micah Babinski
11date: 2024/03/21
12tags:
13    - attack.execution
14    - attack.t1059
15    - attack.t1059.002
16logsource:
17    product: macos
18    category: process_creation
19detection:
20    selection:
21        CommandLine|contains|all:
22            - 'osascript'
23            - '|'
24            - 'curl'
25    condition: selection
26falsepositives:
27    - Unknown
28level: low```

References

• AppleScript - Red Canary Threat Detection Report

  

  Adversaries continue to abuse macOS’s native scripting interpreter, AppleScript, to automate malicious activity and call native APIs.

  
  Read More

Related rules

• Mac AppleScript Input Prompt
• Suspicious Execution via macOS Script Editor
• Bypassing Security Controls - Command Shell
• Obfuscated Commands - Command Shell
• Obfuscation and Escape Characters - Powershell