VOLEXITY_Malware_Any_Pupyrat_B

rule VOLEXITY_Malware_Any_Pupyrat_B : FILE MEMORY
{
	meta:
		description = "Detects the PUPYRAT malware family, a cross-platform RAT written in Python."
		author = "threatintel@volexity.com"
		id = "ec8d0448-f47d-5c6e-bcf9-8f40ae83a96f"
		date = "2022-04-07"
		modified = "2025-03-21"
		reference = "https://github.com/n1nj4sec/pupy"
		source_url = "https://github.com/volexity/threat-intel/blob/3a9d0b52459877ee866a9a0ba06e60059b778c77/2022/2022-06-15 DriftingCloud - Zero-Day Sophos Firewall Exploitation and an Insidious Breach/indicators/yara.yar#L121-L158"
		license_url = "https://github.com/volexity/threat-intel/blob/3a9d0b52459877ee866a9a0ba06e60059b778c77/LICENSE.txt"
		hash = "7474a6008b99e45686678f216af7d6357bb70a054c6d9b05e1817c8d80d536b4"
		logic_hash = "f5b5f35ee783ff1163072591c6d48a85894729156935650a0fd166ae22a2ea00"
		score = 75
		quality = 80
		tags = "FILE, MEMORY"
		os = "all"
		os_arch = "all"
		scan_context = "file,memory"
		severity = "critical"
		license = "See license at https://github.com/volexity/threat-intel/blob/main/LICENSE.txt"
		rule_id = 6689
		version = 4

	strings:
		$elf1 = "LD_PRELOAD=%s HOOK_EXIT=%d CLEANUP=%d exec %s 1>/dev/null 2>/dev/null" ascii
		$elf2 = "reflective_inject_dll" fullword ascii
		$elf3 = "ld_preload_inject_dll" fullword ascii
		$pupy1 = "_pupy.error" ascii
		$pupy2 = "pupy://" ascii
		$s1 = "Args not passed" ascii
		$s2 = "Too many args" ascii
		$s3 = "Can't execute" ascii
		$s4 = "mexec:stdin" ascii
		$s5 = "mexec:stdout" ascii
		$s6 = "mexec:stderr" ascii
		$s7 = "LZMA error" ascii

	condition:
		any of ( $elf* ) or all of ( $pupy* ) or all of ( $s* )
}