SEKOIA_Win_Loader_Astasialoader_Strings

rule SEKOIA_Win_Loader_Astasialoader_Strings : FILE
{
	meta:
		description = "AstasiaLoader strings"
		author = "Sekoia.io"
		id = "8dfabf28-4b5a-43db-87e9-5b9080541ec3"
		date = "2023-08-16"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/win_loader_astasialoader_strings.yar#L1-L25"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		hash = "44b6f7508a82ff6a4d65defc189303eeee393b5fd498de73d74d0a2c75c87401"
		logic_hash = "02a7bed506865d761ec03b8de4b7fc636b71f48c62e933013f2ffa23deabb62e"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$s1 = "newuploaders" wide
		$s2 = "\\infected.exe" wide
		$s3 = "AstasiaLoader" wide
		$s4 = "Astasia.pdb" ascii
		$s5 = "ip-api.com/line/?fields=hosting" wide
		$s6 = "https://api.telegram.org/bot" wide
		$s7 = "currentscript.txt" wide
		$s8 = "sessionlog.txt" wide

	condition:
		uint16be( 0 ) == 0x4d5a and filesize > 50KB and filesize < 1MB and 5 of them
}