SEKOIA_Malware_Remcom_Strings

rule SEKOIA_Malware_Remcom_Strings : FILE
{
	meta:
		description = "Detects RemCom based on strings"
		author = "Sekoia.io"
		id = "7a56d55a-2f35-41ef-b7af-259baf215a62"
		date = "2022-08-30"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/malware_remcom_strings.yar#L1-L22"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "a46bb87bf4722303d33707afb19c8d4f209b98a88552363363520536911469ae"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = "RemComSvc"
		$ = "RemCom_stderr"
		$ = "RemCom_stdin"
		$ = "\\\\.\\pipe\\%s%s%d"
		$ = "RemCom_stdout"
		$ = "\\\\.\\pipe\\RemCom_communicaton"

	condition:
		uint16be( 0 ) == 0x4d5a and filesize < 1MB and 4 of them
}