SEKOIA_Apt_Tortoiseshell_Imaploader

rule SEKOIA_Apt_Tortoiseshell_Imaploader : FILE
{
	meta:
		description = "Detects IMAPLoader malware"
		author = "Sekoia.io"
		id = "e1706b59-5c94-4fbf-8560-0022ca631d1d"
		date = "2023-11-13"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_tortoiseshell_imaploader.yar#L1-L19"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "93f57940ed69145064e5153cc9b099fb9456116cae808acfb4e6f7f14003dde7"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$s1 = "yandex.com"
		$s2 = "saveImapMessage.pdb"
		$s3 = "downloader"
		$s4 = "MailServer.Auth"

	condition:
		filesize < 1MB and 3 of them
}