SEKOIA_Apt_Luckymouse_Rshell_Strings

rule SEKOIA_Apt_Luckymouse_Rshell_Strings : FILE
{
	meta:
		description = "Detects LuckyMouse RShell Mach-O implant"
		author = "Sekoia.io"
		id = "89f18013-ea3e-440f-821e-cef102a43b7b"
		date = "2022-08-05"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_luckymouse_rshell_strings.yar#L1-L26"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "ffca47856d4c4d83312220cff23c0a556be0e675d59ac009c2f74fc0e39cb816"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = { 64 69 72 00 70 61 74 68
        00 64 6F 77 6E 00 72 65
        61 64 00 75 70 6C 6F 61
        64 00 77 72 69 74 65 00
        64 65 6C }
		$ = { 6C 6F 67 69 6E 00 68 6F
        73 74 6E 61 6D 65 00 6C
        61 6E 00 75 73 65 72 6E
        61 6D 65 00 76 65 72 73
        69 6F 6E }

	condition:
		( uint32be( 0 ) == 0xCFFAEDFE or uint16be( 0 ) == 0x4d5a ) and filesize < 300KB and all of them
}