Sofacy_Fysbis_ELF_Backdoor_Gen2

rule Sofacy_Fysbis_ELF_Backdoor_Gen2 {
	meta:
		description = "Detects Sofacy Fysbis Linux Backdoor"
		license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
		author = "Florian Roth (Nextron Systems)"
		reference = "http://researchcenter.paloaltonetworks.com/2016/02/a-look-into-fysbis-sofacys-linux-backdoor/"
		date = "2016-02-13"
		score = 80
		hash1 = "02c7cf55fd5c5809ce2dce56085ba43795f2480423a4256537bfdfda0df85592"
		hash2 = "8bca0031f3b691421cb15f9c6e71ce193355d2d8cf2b190438b6962761d0c6bb"
		hash3 = "fd8b2ea9a2e8a67e4cb3904b49c789d57ed9b1ce5bebfe54fe3d98214d6a0f61"
		id = "d4e3a8bb-b23a-53a4-b5fb-b321a3417b43"
	strings:
		$s1 = "RemoteShell" ascii
		$s2 = "basic_string::_M_replace_dispatch" fullword ascii
		$s3 = "HttpChannel" ascii
	condition:
		uint16(0) == 0x457f and filesize < 500KB and all of them
}