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DITEKSHEN_MALWARE_Win_Floodfix

Detects FloodFix

MalwareFloodfixditekSHen 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 FloodFix

Associated malware family: Floodfix.

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-floodfix.yarBSD 2-Clause License
import "pe"

rule DITEKSHEN_MALWARE_Win_Floodfix : FILE
{
	meta:
		description = "Detects FloodFix"
		author = "ditekSHen"
		id = "b05b0b40-0de8-58a0-889e-44a12d346de4"
		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#L8213-L8219"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "d7da820b00ef5ee2e943b012cfa57421a39f8a7bfc627cc1909151a47092a26d"
		score = 75
		quality = 75
		tags = "FILE"

	condition:
		uint16( 0 ) == 0x5a4d and pe.is_dll ( ) and ( pe.exports ( "FloodFix" ) or pe.exports ( "FloodFix2" ) ) and pe.exports ( "crc32" )
}

Condition

uint16( 0 ) == 0x5a4d and pe.is_dll ( ) and ( pe.exports ( "FloodFix" ) or pe.exports ( "FloodFix2" ) ) and pe.exports ( "crc32" )

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.

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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: b05b0b40-0de8-58a0-889e-44a12d346de4

Tags:FILE

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