SEKOIA_Apt_Sofacy_Graphitemalware_Generic

import "pe"

rule SEKOIA_Apt_Sofacy_Graphitemalware_Generic : FILE
{
	meta:
		description = "Detects APT28 graphite malware based on strings"
		author = "Sekoia.io"
		id = "6b51cfa3-4a7d-4c2a-9fd9-f129b8a18466"
		date = "2022-09-27"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_sofacy_graphitemalware_generic.yar#L3-L25"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "f4c994c36768bae6d6e3b5aeefb634e485ab7b483a693781f29d5ff44c71996f"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = "Microsoft Enhanced RSA and AES Cryptographic Provider" wide
		$ = "Microsoft Enhanced RSA and AES Cryptographic Provider (Prototype)" wide
		$ = "%s %04d sp%1d.%1d %s"
		$ = "%s%c%s%c%s"
		$ = "InternetReadFile"
		$ = "ObtainUserAgentString"
		$ = "CryptImportKey"

	condition:
		uint16be( 0 ) == 0x4d5a and filesize < 100KB and ( all of them or pe.imphash ( ) == "c56c322548250651361aef7dacf93eaf" )
}