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MALPEDIA_Win_Woody_Auto

autogenerated rule brought to you by yara-signator

MalwareWoodyMalpedia 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: Woody.

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

Summary generated from the rule's metadata and condition.

Rule source

win-woody-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Woody_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "66315f8b-2bbb-5197-a74a-1868f88ef27b"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.woody"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.woody_auto.yar#L1-L133"
		license_url = "N/A"
		logic_hash = "c73a64bbc8f596f95f70f6096e049e95fdba1190a98d908874b03f5b9cb274f5"
		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 = { 8d4604 8d4d08 50 e8???????? 81c608010000 8d4d08 56 }
		$sequence_1 = { 8bf0 e8???????? 84c0 750d 5f 5e 5d }
		$sequence_2 = { ff15???????? 85c0 0f8550010000 b931000000 8d7c2429 88442428 c68424b801000000 }
		$sequence_3 = { 8d842478010000 53 50 e8???????? 83c414 8d8c246c010000 68b4000000 }
		$sequence_4 = { e8???????? 83c404 8d4c2410 6a00 51 6878150000 68b4b20110 }
		$sequence_5 = { 890cd0 8b4dd0 8b55d4 03d1 8b4df4 8954c804 ff45f4 }
		$sequence_6 = { 50 8d8520ffffff 50 8d45f0 50 53 }
		$sequence_7 = { ffd3 83f8ff 740e 50 ff15???????? b007 e9???????? }
		$sequence_8 = { 83c404 663bc3 7606 66a3???????? 8d9540ffffff 68e8ea0110 52 }
		$sequence_9 = { 5b 81c470020000 c20400 8b442418 50 ff15???????? 5f }

	condition:
		7 of them and filesize < 409600
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8d4604 8d4d08 50 e8???????? 81c608010000 8d4d08 56 }
$sequence_1hex{ 8bf0 e8???????? 84c0 750d 5f 5e 5d }
$sequence_2hex{ ff15???????? 85c0 0f8550010000 b931000000 8d7c2429 88442428 c68424b801000000 }
$sequence_3hex{ 8d842478010000 53 50 e8???????? 83c414 8d8c246c010000 68b4000000 }
$sequence_4hex{ e8???????? 83c404 8d4c2410 6a00 51 6878150000 68b4b20110 }
$sequence_5hex{ 890cd0 8b4dd0 8b55d4 03d1 8b4df4 8954c804 ff45f4 }
$sequence_6hex{ 50 8d8520ffffff 50 8d45f0 50 53 }
$sequence_7hex{ ffd3 83f8ff 740e 50 ff15???????? b007 e9???????? }
$sequence_8hex{ 83c404 663bc3 7606 66a3???????? 8d9540ffffff 68e8ea0110 52 }
$sequence_9hex{ 5b 81c470020000 c20400 8b442418 50 ff15???????? 5f }

Condition

7 of them and filesize < 409600

In plain words (Heuristic)

  • The file must be smaller than 409600 (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: 66315f8b-2bbb-5197-a74a-1868f88ef27b

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