SEKOIA_Infostealer_Win_Acrstealer_Str

rule SEKOIA_Infostealer_Win_Acrstealer_Str : FILE
{
	meta:
		description = "Finds ACR Stealer standalone samples based on specific strings."
		author = "Sekoia.io"
		id = "63b4d6ff-0cab-44ec-9d53-bb2612371a48"
		date = "2024-04-22"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/infostealer_win_acrstealer_str.yar#L1-L29"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "53d313857577b39b51a3e396c078d39a8b8ab803295b689357c3e8ea94cac9f7"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$str01 = "ref.txt" ascii
		$str02 = "Wininet.dll" ascii
		$str03 = "Content-Type: application/octet-stream; boundary=----" ascii
		$str04 = "POST" ascii
		$str05 = "os_c" ascii fullword
		$str06 = "en_k" ascii fullword
		$str07 = "MyApp/1.0" ascii
		$str08 = "/Up/b" ascii
		$str09 = "Hello, World!" ascii
		$str10 = "/ujs/" ascii
		$str11 = "/Up/" ascii fullword
		$str12 = "ostr" ascii fullword
		$str13 = "brCH" ascii fullword
		$str14 = "brGk" ascii fullword
		$str15 = "https://steamcommunity.com/profiles/" ascii

	condition:
		uint16( 0 ) == 0x5A4D and 10 of them
}