SEKOIA_Crybercrime_Prophetspider_Proxy

import "pe"

rule SEKOIA_Crybercrime_Prophetspider_Proxy : FILE
{
	meta:
		description = "Detects the Winntaa decryption loop or imphash"
		author = "Sekoia.io"
		id = "b7637fc3-bf81-40c4-869c-1c283574e0a7"
		date = "2022-02-17"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/crybercrime_prophetspider_proxy.yar#L3-L41"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "711ef3fc6ac488200415b7178c7f639ad9f6c72077bbebac2e6d5e0bed7120dd"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = { 56
        57
        48 8D 95 F0 FE FF FF
        31 C0
        66 21 02
        48 89 CE
        AC
        48 89 D7
        4C 89 C2
        88 D4
        30 C2
        0F B6 CA
        48 89 95 E8 FE FF FF
        AC
        30 E0
        AA
        E2 FA
        88 C8
        AA
        48 8D 85 F0 FE FF FF
        48 8B 95 E8 FE FF FF
        5F
        5E
        C3 }

	condition:
		uint16be( 0 ) == 0x4d5a and ( all of them or pe.imphash ( ) == "55e0b8e5b4d787c680ada4e450789a4d" )
}