SIGNATURE_BASE_SUSP_Fscan_Port_Scanner_Output_Jun23

rule SIGNATURE_BASE_SUSP_Fscan_Port_Scanner_Output_Jun23 : SCRIPT FILE
{
	meta:
		description = "Detects output generated by the command line port scanner FScan"
		author = "Florian Roth"
		id = "7eb4b27f-0c5b-5d7e-b759-95d7894d5822"
		date = "2023-06-15"
		modified = "2023-12-05"
		reference = "https://www.mandiant.com/resources/blog/barracuda-esg-exploited-globally"
		source_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/apt_barracuda_esg_unc4841_jun23.yar#L103-L117"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		logic_hash = "49b5055c96d7b7446ee5ae8667a5aa3645f0f98d8b5f2bffcd6ef3b20bc64e05"
		score = 70
		quality = 85
		tags = "SCRIPT, FILE"

	strings:
		$s1 = "[*] NetInfo:" ascii
		$s2 = ":443 open" ascii
		$s3 = "   [->]"

	condition:
		filesize < 800KB and all of them
}