SEKOIA_Apt_Nobelium_Acrobox_Downloader_Apr2022

rule SEKOIA_Apt_Nobelium_Acrobox_Downloader_Apr2022 : FILE
{
	meta:
		description = "Detects AcroBox downloader"
		author = "Sekoia.io"
		id = "77f7f01d-72a2-4b13-b23f-d938a415dd40"
		date = "2022-05-11"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_nobelium_acrobox_downloader_apr2022.yar#L1-L24"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "ebcbdf13908971eea3e5b291719527e2e454a9ee3b98b5dc66149b2bb3b8fe67"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$s1 = { 80 ?? 7B
        0F 84 ?? ?? 00 00
        80 ?? ?? 0F
        0F 84 ?? ?? 00 00
        80 ?? ?? 0F
        0F 84 ?? ?? 00 00
        80 ?? ?? 0F
        0F 84 ?? ?? 00 00 }

	condition:
		uint16be( 0 ) == 0x4d5a and filesize < 200KB and all of ( $s* )
}