SIGNATURE_BASE_EXT_APT_UNC2891_SLAPSTICK

rule SIGNATURE_BASE_EXT_APT_UNC2891_SLAPSTICK : FILE
{
	meta:
		description = "Detects SLAPSTICK malware used by UNC2891"
		author = "Mandiant"
		id = "2e97b8cb-a86e-5be9-92dc-fd1474aa9547"
		date = "2022-03-17"
		modified = "2026-05-15"
		reference = "https://www.mandiant.com/resources/blog/unc2891-overview"
		source_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/apt_unc2891_tinyshell_slapstick.yar#L46-L60"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		logic_hash = "b046a949dab2f38b8181782cc6ea0782d2e102c0c30bc782de74112a77c23d6e"
		score = 80
		quality = 85
		tags = "FILE"

	strings:
		$ss1 = { 25 59 20 25 62 20 25 64 20 25 48 3a 25 4d 3a 25 53 20 20 20 20 00 }
		$ss2 = { 25 2d 32 33 73 20 25 2d 32 33 73 20 25 2d 32 33 73 00 }
		$ss3 = { 25 2d 32 33 73 20 25 2d 32 33 73 20 25 2d 32 33 73 20 25 2d 32 33 73 20 25 2d 32 33 73 20 25 73 0a 00 }

	condition:
		( uint32( 0 ) == 0x464c457f ) and all of them
}