Skip to content
yararules.org
Menu

YARA · ditekSHen detection

DITEKSHEN_MALWARE_Win_Pureloader

Detects Pure loader / injector

MalwarePureloaderditekSHen detectionBSD 2-Clause LicenseCompiles with YARA-X
Author
ditekSHen
Date
2020-11-06
Modified
2024-11-01
Score / Quality
75 / 75

What this rule detects

Detects Pure loader / injector

Associated malware family: Pureloader.

Targets: Windows PE.

It defines 9 patterns (9 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
malware-win-pureloader.yarBSD 2-Clause License
rule DITEKSHEN_MALWARE_Win_Pureloader : FILE
{
	meta:
		description = "Detects Pure loader / injector"
		author = "ditekSHen"
		id = "ad44a12a-4ac7-5cc7-92ab-13c23514de69"
		date = "2020-11-06"
		modified = "2024-11-01"
		reference = "https://github.com/ditekshen/detection"
		source_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/yara/malware.yar#L5366-L5382"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "1f0bd20e769ea79d28d6e60ca06aa8aa2b3436426cfe0cd4f2023a08236875cd"
		score = 75
		quality = 75
		tags = "FILE"

	strings:
		$s1 = "InvokeMember" fullword wide
		$s2 = "ConcatProducer" fullword wide
		$s3 = ".Classes.Resolver" wide
		$s4 = "get_DLL" fullword ascii
		$s5 = "BufferedStream" fullword ascii
		$s6 = "GZipStream" fullword ascii
		$s7 = "MemoryStream" fullword ascii
		$s8 = "Decompress" fullword ascii
		$s9 = "lSystem.Resources.ResourceReader, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089#System.Resources.R" ascii

	condition:
		uint16( 0 ) == 0x5a4d and 8 of them
}

Strings (9 patterns)

IdentifierTypeValueModifiers
$s1text"InvokeMember"fullword wide
$s2text"ConcatProducer"fullword wide
$s3text".Classes.Resolver"wide
$s4text"get_DLL"fullword ascii
$s5text"BufferedStream"fullword ascii
$s6text"GZipStream"fullword ascii
$s7text"MemoryStream"fullword ascii
$s8text"Decompress"fullword ascii
$s9text"lSystem.Resources.ResourceReader, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089#System.Resources.R"ascii

Condition

uint16( 0 ) == 0x5a4d and 8 of them

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • At least 8 patterns in the rule must match.

Test this rule in your browser

Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.

Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.

Open in editor

References

Licence & attribution

Author: ditekSHen

Source repository: ditekSHen detection @ e76c93dcde

Licence: BSD 2-Clause License (repository licence)

Copyright notice: Copyright 2021 by ditekSHen (https://github.com/ditekshen/detection).

Original rule

Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.

Rule id: ad44a12a-4ac7-5cc7-92ab-13c23514de69

Tags:FILE

Related rules