SEKOIA_Merlin_Crossplatform

rule SEKOIA_Merlin_Crossplatform : FILE
{
	meta:
		description = "Detects Merlin agent cross platform"
		author = "Sekoia.io"
		id = "c9c57f5e-26c3-43be-b2cf-10f5129d3be6"
		date = "2022-01-03"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/merlin_crossplatform.yar#L1-L23"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "975cc4fe0d89383188f9fd3c516d1e853dd6070d7703c0b5b5874dc1e7e6f32a"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$s1 = ".CRT" ascii
		$s2 = ".tls" ascii
		$s3 = "github.com/Ne0nd0g/merlin" ascii
		$s4 = "github.com/refraction-networking" ascii
		$s5 = "SendMerlinMessage" ascii
		$s6 = "ifconfigH9" ascii

	condition:
		( uint16( 0 ) == 0x5a4d or uint16( 0 ) == 0x457f ) and all of them and filesize > 5MB and filesize < 15MB
}