malrtf_ole2link

rule malrtf_ole2link : exploit {
	meta:
		author = "@h3x2b <tracker _AT h3x.eu>"
		description = "Detects weaponized RTF documents with OLE2Link exploit"
		id = "5080e79a-3abc-5fc3-902e-b362f20510f9"
	strings:
		//having objdata structure
		$rtf_olelink_01 = "\\objdata" nocase
		//hex encoded OLE2Link
		$rtf_olelink_02 = "4f4c45324c696e6b" nocase
		//hex encoded docfile magic - doc file albilae
		$rtf_olelink_03 = "d0cf11e0a1b11ae1" nocase
		//hex encoded "http://"
		$rtf_payload_01 = "68007400740070003a002f002f00" nocase
		//hex encoded "https://"
		$rtf_payload_02 = "680074007400700073003a002f002f00" nocase
		//hex encoded "ftp://"
		$rtf_payload_03 = "6600740070003a002f002f00" nocase
	condition:
		uint32be(0) == 0x7B5C7274
		and all of ($rtf_olelink_*)
		and any of ($rtf_payload_*)
}