SEKOIA_Weevely_Webshell_Payload

rule SEKOIA_Weevely_Webshell_Payload : FILE
{
	meta:
		description = "Detects weevely webshell"
		author = "Sekoia.io"
		id = "f2879c6e-3d1b-41be-8b1d-4f0503fd4b29"
		date = "2024-04-22"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/weevely_webshell_payload.yar#L1-L17"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "bb02ec519d77526cc81ebd7743336b333b9498f79079f7008970cf1bb51c4948"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$s1 = "<?php include \""
		$s2 = ".basename(__FILE__).\""
		$s3 = ";__HALT_COMPILER(); ?>"

	condition:
		all of them and filesize < 1MB and @s1 == 0 and @s2 < @s3
}