SEKOIA_Apt_Gamaredon_Powerrevshell

rule SEKOIA_Apt_Gamaredon_Powerrevshell : FILE
{
	meta:
		description = "Detects Powershell reverse shell"
		author = "Sekoia.io"
		id = "b5161c23-c607-4096-9f4a-1be516a0a614"
		date = "2023-02-08"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_gamaredon_powerrevshell.yar#L1-L19"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "fc5abcdf47641c1e7978cf076550f38987305bb2171b3e65f7865102a065af43"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = "iex $enc.GetString("
		$ = "$stream.Write"
		$ = ".).FullName"
		$ = "Sockets.TcpClient"
		$ = "\">\";"

	condition:
		all of them and filesize < 3000
}