Skip to content

YARA · Malpedia signator rules

MALPEDIA_Win_Madmax_Auto

autogenerated rule brought to you by yara-signator

MalwareMadmaxMalpedia signator rulesCreative Commons Attribution-ShareAlike 4.0Compiles with YARA-X
Author
Felix Bilstein - yara-signator at cocacoding dot com
Date
2026-05-04
Modified
2026-05-18
Score / Quality
75 / 75

What this rule detects

autogenerated rule brought to you by yara-signator

Associated malware family: Madmax.

It defines 10 patterns (0 text, 10 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-madmax-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Madmax_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "a885561a-5c30-5ea2-b33b-6f61469226de"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.madmax"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.madmax_auto.yar#L1-L134"
		license_url = "N/A"
		logic_hash = "bd0d35721058295e1505b2a5041556658b23c13113e7678219e42884319ffc8f"
		score = 75
		quality = 75
		tags = "FILE"
		version = "1"
		tool = "yara-signator v0.6.0"
		signator_config = "callsandjumps;datarefs;binvalue"
		malpedia_rule_date = "20260422"
		malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
		malpedia_version = "20260504"
		malpedia_license = "CC BY-SA 4.0"
		malpedia_sharing = "TLP:WHITE"

	strings:
		$sequence_0 = { ef 40 41 ac 285977 a4 a1???????? }
		$sequence_1 = { ee 7fb8 3add ab e06d 9e 9d }
		$sequence_2 = { dde8 47 6f cd6c 4b 2ed8a8dbd419a5 90 }
		$sequence_3 = { 91 6a32 dc416f bb02fb8d4f 4c 39e2 1146d8 }
		$sequence_4 = { ae 5e 8b14d1 3c57 8c1b 55 a3???????? }
		$sequence_5 = { c1c5d4 c0e578 7b34 58 27 cd21 90 }
		$sequence_6 = { c5a62706f92c bfbe20b97c ee 73dd d0e7 b7ec 9d }
		$sequence_7 = { d2b100e15df3 93 395fa1 a1???????? a7 5d 95 }
		$sequence_8 = { f605????????f3 757c b632 6b8e7b51885a74 b0e5 0d97cfb063 f26e }
		$sequence_9 = { f5 844296 ec 8603 98 a9e110229b a8d0 }

	condition:
		7 of them and filesize < 3227648
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ ef 40 41 ac 285977 a4 a1???????? }
$sequence_1hex{ ee 7fb8 3add ab e06d 9e 9d }
$sequence_2hex{ dde8 47 6f cd6c 4b 2ed8a8dbd419a5 90 }
$sequence_3hex{ 91 6a32 dc416f bb02fb8d4f 4c 39e2 1146d8 }
$sequence_4hex{ ae 5e 8b14d1 3c57 8c1b 55 a3???????? }
$sequence_5hex{ c1c5d4 c0e578 7b34 58 27 cd21 90 }
$sequence_6hex{ c5a62706f92c bfbe20b97c ee 73dd d0e7 b7ec 9d }
$sequence_7hex{ d2b100e15df3 93 395fa1 a1???????? a7 5d 95 }
$sequence_8hex{ f605????????f3 757c b632 6b8e7b51885a74 b0e5 0d97cfb063 f26e }
$sequence_9hex{ f5 844296 ec 8603 98 a9e110229b a8d0 }

Condition

7 of them and filesize < 3227648

In plain words (Heuristic)

  • The file must be smaller than 3227648 (a cheap guard that skips large files).
  • At least 7 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: Felix Bilstein - yara-signator at cocacoding dot com

Source repository: Malpedia signator rules @ c901f97b7d

Licence: Creative Commons Attribution-ShareAlike 4.0 (repository licence)

Original rule

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

Rule id: a885561a-5c30-5ea2-b33b-6f61469226de

Metadata

version1
toolyara-signator v0.6.0
signator_configcallsandjumps;datarefs;binvalue
malpedia_rule_date20260422
malpedia_hasha182e35da64e6d71cb55f125c4d4225196523f14
malpedia_version20260504
malpedia_licenseCC BY-SA 4.0
malpedia_sharingTLP:WHITE

Tags:FILE