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MALPEDIA_Win_Mozart_Auto

autogenerated rule brought to you by yara-signator

MalwareMozartMalpedia 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: Mozart.

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

Summary generated from the rule's metadata and condition.

Rule source

win-mozart-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Mozart_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "83806af7-d9bd-5675-873d-31f6311ab16c"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.mozart"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.mozart_auto.yar#L1-L119"
		license_url = "N/A"
		logic_hash = "99ae6bb8e4f475ba6d77c0ab9a4ae5829ba89933aab4d79d20ca7b2e5c413440"
		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 = { 7471 57 8b15???????? a1???????? }
		$sequence_1 = { 8bc7 2bc6 50 51 56 }
		$sequence_2 = { c3 ff15???????? 33d2 3d14050000 0f95c2 4a 83e204 }
		$sequence_3 = { f6c410 741a 8b542420 8b0a 45 3be9 760a }
		$sequence_4 = { 3bca 736e 8bd0 c1ea0c 83e23f }
		$sequence_5 = { 8d3c85c0db4000 8b07 83e61f c1e603 }
		$sequence_6 = { 8bd9 33d2 85db 7c12 8d0495f8c84000 }
		$sequence_7 = { 84c0 7546 8d942418010000 52 56 e8???????? }
		$sequence_8 = { 50 6a01 ffd6 8b35???????? 50 ffd6 8b4c2408 }
		$sequence_9 = { 83c408 5d c20400 833d????????02 750d }

	condition:
		7 of them and filesize < 114688
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 7471 57 8b15???????? a1???????? }
$sequence_1hex{ 8bc7 2bc6 50 51 56 }
$sequence_2hex{ c3 ff15???????? 33d2 3d14050000 0f95c2 4a 83e204 }
$sequence_3hex{ f6c410 741a 8b542420 8b0a 45 3be9 760a }
$sequence_4hex{ 3bca 736e 8bd0 c1ea0c 83e23f }
$sequence_5hex{ 8d3c85c0db4000 8b07 83e61f c1e603 }
$sequence_6hex{ 8bd9 33d2 85db 7c12 8d0495f8c84000 }
$sequence_7hex{ 84c0 7546 8d942418010000 52 56 e8???????? }
$sequence_8hex{ 50 6a01 ffd6 8b35???????? 50 ffd6 8b4c2408 }
$sequence_9hex{ 83c408 5d c20400 833d????????02 750d }

Condition

7 of them and filesize < 114688

In plain words (Heuristic)

  • The file must be smaller than 114688 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

Test this rule in your browser

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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: 83806af7-d9bd-5675-873d-31f6311ab16c

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