SEKOIA_Apt_Kimsuky_Sharptongue_Strings

rule SEKOIA_Apt_Kimsuky_Sharptongue_Strings : FILE
{
	meta:
		description = "Detects SharpTongue variants."
		author = "Sekoia.io"
		id = "56027edb-4e6e-40ec-a1b9-36c52b0dd3ec"
		date = "2022-07-29"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_kimsuky_sharptongue_strings.yar#L1-L18"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "a7a9045485f6e713a8ae1bc87cd1296d64905b18e5d13d6e2b9a95328181af54"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$s1 = "Post0.Open" ascii wide
		$s2 = ".php?op=" ascii wide
		$s3 = "s=s&Mid(c,ix*d+jx+1,1)" ascii wide
		$s4 = "curl -o " ascii wide

	condition:
		$s2 in ( @s1 .. @s1 + 200 ) or $s2 in ( @s4 .. @s4 + 200 ) or $s3 and filesize < 500KB
}