SEKOIA_Loader_Win_Jennlog

import "pe"
import "hash"

rule SEKOIA_Loader_Win_Jennlog
{
	meta:
		description = "Jennlog loader used to deliver the Apostle ransomware"
		author = "Sekoia.io"
		id = "a69088e5-207f-494f-876b-766b8050e8c2"
		date = "2021-10-04"
		modified = "2024-12-19"
		reference = "https://www.sentinelone.com/labs/new-version-of-apostle-ransomware-reemerges-in-targeted-attack-on-higher-education/"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/loader_win_jennlog.yar#L4-L24"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "0ffcd1f35570b28a1bd6f9a0361f8f921942f7345dcb2896fc092bb92f7d4d6d"
		score = 75
		quality = 80
		tags = ""
		version = "1.0"
		classification = "TLP:CLEAR"

	condition:
		pe.timestamp== 3140259112 or for any i in ( 0 .. pe.number_of_sections -1 ) : ( hash.md5 ( pe.sections [ i ] . raw_data_offset , pe.sections [ i ] . raw_data_size ) == "4c4577276ff0323d9aedcc39ecf2c964" ) or for any i in ( 0 .. pe.number_of_resources -1 ) : ( hash.sha256 ( pe.resources [ i ] . offset , pe.resources [ i ] . length ) == "8476a7fca587f1e5d3ae076293b9fbcccbebc4bd4f7b783228ad5da39305a3d9" )
}