DITEKSHEN_MALWARE_Linux_UNK02

rule DITEKSHEN_MALWARE_Linux_UNK02 : FILE
{
	meta:
		description = "Detects unknown/unidentified Linux malware"
		author = "ditekSHen"
		id = "6e62df0d-d329-5e52-af74-2a1f19dc4cca"
		date = "2020-11-06"
		modified = "2024-11-01"
		reference = "https://github.com/ditekshen/detection"
		source_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/yara/malware.yar#L2838-L2852"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "4cde21932c27fe3c08495f557b5e086b1fb668d8b5508249891828b9ed48edd4"
		score = 75
		quality = 75
		tags = "FILE"

	strings:
		$rf1 = "[]A\\A]A^A_" ascii
		$rf2 = "[A\\A]A^A_]" ascii
		$f1 = "/bin/basH" ascii fullword
		$f2 = "/proc/seH" ascii fullword
		$f3 = "/dev/ptsH" ascii fullword
		$f4 = "pqrstuvwxyzabcde" ascii fullword
		$f5 = "libnss_%s.so.%d.%d" ascii fullword

	condition:
		uint16( 0 ) == 0x457f and ( all of ( $f* ) and #rf1 > 3 and #rf2 > 3 )
}