SEKOIA_Apt_Apt41_Powershell_Collection_Script

rule SEKOIA_Apt_Apt41_Powershell_Collection_Script : FILE
{
	meta:
		description = "Detects PowerShell collection script"
		author = "Sekoia.io"
		id = "55b6cc3e-24b2-4faa-a7fb-b4203a8e6d83"
		date = "2023-11-15"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_apt41_powershell_collection_script.yar#L1-L19"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "8b0462636c9f6270baff2bf09638e94db6d5a0472b8216ddd1919a77b6a63aca"
		score = 75
		quality = 70
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = "$yestoday.ToString(" ascii wide nocase
		$ = "$m.LastAccessTime -" ascii wide nocase
		$ = "$fmat=" ascii wide nocase
		$ = "$computername" ascii wide nocase
		$ = "Rar.exe" ascii wide nocase

	condition:
		filesize < 10KB and all of them
}