Skip to content
yararules.org
Menu

YARA · ditekSHen detection

DITEKSHEN_MALWARE_Win_Fyanti

Hunt for FYAnti third-stage loader DLLs

MalwareFyantiditekSHen 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

Hunt for FYAnti third-stage loader DLLs

Associated malware family: Fyanti.

Targets: Windows PE.

It has no patterns: the condition alone decides (modules, file properties or other rules). YARA modules used: pe.

Summary generated from the rule's metadata and condition.

Rule source

Download .yar

Includes the imports needed to compile it on its own.

malware-win-fyanti.yarBSD 2-Clause License
import "pe"

rule DITEKSHEN_MALWARE_Win_Fyanti : FILE
{
	meta:
		description = "Hunt for FYAnti third-stage loader DLLs"
		author = "ditekSHen"
		id = "7a1f913c-d83f-50e9-943c-246c4c71c654"
		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#L5345-L5351"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "baaeef0b1452d7ea41ffaaff592cac2c5e16f921dbbfb3a300a63e69f134e9d0"
		score = 75
		quality = 75
		tags = "FILE"

	condition:
		uint16( 0 ) == 0x5a4d and pe.is_dll ( ) and pe.exports ( "FuckYouAnti" )
}

Condition

uint16( 0 ) == 0x5a4d and pe.is_dll ( ) and pe.exports ( "FuckYouAnti" )

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • Uses the pe module.
  • Checks exported functions or the DLL name.
  • Requires a DLL.

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: 7a1f913c-d83f-50e9-943c-246c4c71c654

Tags:FILE

Related rules