41 lines
1.8 KiB
Text
41 lines
1.8 KiB
Text
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rule Persistence_Agent_MacOS {
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meta:
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description = "Detects a Python agent that establishes persistence on macOS"
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author = "John Lambert @JohnLaTwC"
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reference = "https://ghostbin.com/paste/mz5nf"
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hash = "4288a81779a492b5b02bad6e90b2fa6212fa5f8ee87cc5ec9286ab523fc02446 cec7be2126d388707907b4f9d681121fd1e3ca9f828c029b02340ab1331a5524 e1cf136be50c4486ae8f5e408af80b90229f3027511b4beed69495a042af95be"
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id = "9c69af3c-ee85-58ac-8b78-66760addc117"
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strings:
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$h1 = "#!/usr/bin/env python"
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$s_1= "<plist" ascii fullword
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$s_2= "ProgramArguments" ascii fullword
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$s_3= "Library" ascii fullword
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$sinterval_1= "StartInterval" ascii fullword
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$sinterval_2= "RunAtLoad" ascii fullword
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//<plist
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$e_1 = /(AHAAbABpAHMAdA|cGxpc3|PABwAGwAaQBzAHQA|PHBsaXN0|wAcABsAGkAcwB0A|xwbGlzd)/ ascii
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//ProgramArguments
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$e_2 =/(AAcgBvAGcAcgBhAG0AQQByAGcAdQBtAGUAbgB0AHMA|AHIAbwBnAHIAYQBtAEEAcgBnAHUAbQBlAG4AdABzA|Byb2dyYW1Bcmd1bWVudH|cm9ncmFtQXJndW1lbnRz|UAByAG8AZwByAGEAbQBBAHIAZwB1AG0AZQBuAHQAcw|UHJvZ3JhbUFyZ3VtZW50c)/ ascii
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//Library
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$e_4 = /(AGkAYgByAGEAcgB5A|aWJyYXJ5|TABpAGIAcgBhAHIAeQ|TGlicmFye|wAaQBiAHIAYQByAHkA|xpYnJhcn)/ ascii
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//StartInterval
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$einterval_a = /(AHQAYQByAHQASQBuAHQAZQByAHYAYQBsA|dGFydEludGVydmFs|MAdABhAHIAdABJAG4AdABlAHIAdgBhAGwA|N0YXJ0SW50ZXJ2YW|U3RhcnRJbnRlcnZhb|UwB0AGEAcgB0AEkAbgB0AGUAcgB2AGEAbA)/ ascii
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$einterval_b = /(AHUAbgBBAHQATABvAGEAZA|dW5BdExvYW|IAdQBuAEEAdABMAG8AYQBkA|J1bkF0TG9hZ|UgB1AG4AQQB0AEwAbwBhAGQA|UnVuQXRMb2Fk)/ ascii
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condition:
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uint32(0) == 0x752f2123
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and $h1 at 0
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and filesize < 120KB
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and
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(
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(all of ($s_*) and 1 of ($sinterval*))
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or
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(all of ($e_*) and 1 of ($einterval*))
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)
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}
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