SEKOIA_Apt_Emberbear_Credpump_Strings

rule SEKOIA_Apt_Emberbear_Credpump_Strings : FILE
{
	meta:
		description = "Detects CredPump backdoor"
		author = "Sekoia.io"
		id = "c9898e34-4ab8-49d6-9c8a-3fce592449e2"
		date = "2023-02-28"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_emberbear_credpump_strings.yar#L1-L20"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "6f2c96fe3f314221626b4c053658af0e7231f151886f10eb1d69e07ea3e5c634"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = "User=%s Pass=%s Host=%s"
		$ = "/etc/rc0.d/.rc0.d"
		$ = "pam_get_authtok"
		$ = "Password:"

	condition:
		uint32be( 0 ) == 0x7f454c46 and filesize < 200KB and all of them
}