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MALPEDIA_Win_Badaudio_Auto

autogenerated rule brought to you by yara-signator

MalwareBadaudioMalpedia 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: Badaudio.

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

Summary generated from the rule's metadata and condition.

Rule source

win-badaudio-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Badaudio_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "f66510e8-a79b-5f39-b71b-ec60a2990bcb"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.badaudio"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.badaudio_auto.yar#L1-L121"
		license_url = "N/A"
		logic_hash = "b6858436bb9db6a00abff42fb02bf9495539b4e40b1440eb6da886e953dd1918"
		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 = { c7417800000000 c7417c0f000000 c6416800 c7818000000000000000 c7819000000000000000 c781940000000f000000 c6818000000000 }
		$sequence_1 = { 89d7 c1c70f 8b74840c 89d3 c1c30d }
		$sequence_2 = { 89f2 eb17 8902 894204 894208 89c1 eb22 }
		$sequence_3 = { 81fa00100000 721c 8b51fc 83c1fc 8955e0 }
		$sequence_4 = { 8baea8000000 8b4644 83f810 722c }
		$sequence_5 = { 732b 83c023 89d1 50 }
		$sequence_6 = { 83c414 5d c3 e8???????? 55 83ec14 8db524ffffff }
		$sequence_7 = { c745f001000000 8d4dd4 8d45b8 50 56 }
		$sequence_8 = { 30dd 30fd 886c06fa 88cd 00cd c0f907 }
		$sequence_9 = { 7218 8b79fc 83c1fc 29f9 83f920 0f83a6010000 83c024 }

	condition:
		7 of them and filesize < 1420288
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ c7417800000000 c7417c0f000000 c6416800 c7818000000000000000 c7819000000000000000 c781940000000f000000 c6818000000000 }
$sequence_1hex{ 89d7 c1c70f 8b74840c 89d3 c1c30d }
$sequence_2hex{ 89f2 eb17 8902 894204 894208 89c1 eb22 }
$sequence_3hex{ 81fa00100000 721c 8b51fc 83c1fc 8955e0 }
$sequence_4hex{ 8baea8000000 8b4644 83f810 722c }
$sequence_5hex{ 732b 83c023 89d1 50 }
$sequence_6hex{ 83c414 5d c3 e8???????? 55 83ec14 8db524ffffff }
$sequence_7hex{ c745f001000000 8d4dd4 8d45b8 50 56 }
$sequence_8hex{ 30dd 30fd 886c06fa 88cd 00cd c0f907 }
$sequence_9hex{ 7218 8b79fc 83c1fc 29f9 83f920 0f83a6010000 83c024 }

Condition

7 of them and filesize < 1420288

In plain words (Heuristic)

  • The file must be smaller than 1420288 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

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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: f66510e8-a79b-5f39-b71b-ec60a2990bcb

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