SEKOIA_Apt_Tealkurma_Snappytcp_Reverse_Shell_Strings

rule SEKOIA_Apt_Tealkurma_Snappytcp_Reverse_Shell_Strings : FILE
{
	meta:
		description = "Detects TealKurma SnappyTCP reverse shell"
		author = "Sekoia.io"
		id = "e842825c-546c-475a-bc94-7e97aea4e9e0"
		date = "2023-12-08"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_tealkurma_snappytcp_reverse_shell_strings.yar#L1-L21"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "feb24cafcf5b080c91dab42bf8d78fbdb0b7fae9395c7513f02aa90a25663d2c"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = "2>&1>/dev/null&" ascii
		$ = ".php HTTP/1.1" ascii
		$ = "GET /" ascii
		$ = "Hostname: %s" ascii
		$ = "bash -c \"./" ascii

	condition:
		uint32be( 0 ) == 0x7f454c46 and filesize < 3MB and 3 of them
}