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MALPEDIA_Win_Yarat_Auto

autogenerated rule brought to you by yara-signator

MalwareYaratMalpedia 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: Yarat.

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

Summary generated from the rule's metadata and condition.

Rule source

win-yarat-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Yarat_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "63e758ee-e47a-5b6d-9f31-91407ed4d575"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.yarat"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.yarat_auto.yar#L1-L134"
		license_url = "N/A"
		logic_hash = "6cc12e2858c68d08ba1de7d1ffb11d2d35640e8a6b2fe791f291535d676fe1a6"
		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 = { 8bc8 83be1c01000002 7515 83f814 7410 68???????? 56 }
		$sequence_1 = { 8b8dc4feffff 51 8b4108 894634 a1???????? 8b4040 ffd0 }
		$sequence_2 = { c1e81f 03c2 8d5518 894518 69c0e8030000 2bc8 69c1e8030000 }
		$sequence_3 = { c645fc08 8bc8 83781410 7202 8b08 83781004 7534 }
		$sequence_4 = { f9 81c504000000 33c3 f8 c1c003 48 6681fd2a15 }
		$sequence_5 = { 8d45d4 50 6819270000 57 e8???????? 68???????? 682c4e0000 }
		$sequence_6 = { 8b4dc8 8b45e4 0b45dc 7528 8bc1 0bc2 7522 }
		$sequence_7 = { 8b7508 8bc2 c1e804 2401 88868e0d0000 f6c210 7406 }
		$sequence_8 = { 8bf8 83c40c 85ff 0f8527020000 83bdd8feffff00 7529 68???????? }
		$sequence_9 = { 8b4510 85c0 8b4d0c 8b5514 53 8b5d08 56 }

	condition:
		7 of them and filesize < 8692736
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8bc8 83be1c01000002 7515 83f814 7410 68???????? 56 }
$sequence_1hex{ 8b8dc4feffff 51 8b4108 894634 a1???????? 8b4040 ffd0 }
$sequence_2hex{ c1e81f 03c2 8d5518 894518 69c0e8030000 2bc8 69c1e8030000 }
$sequence_3hex{ c645fc08 8bc8 83781410 7202 8b08 83781004 7534 }
$sequence_4hex{ f9 81c504000000 33c3 f8 c1c003 48 6681fd2a15 }
$sequence_5hex{ 8d45d4 50 6819270000 57 e8???????? 68???????? 682c4e0000 }
$sequence_6hex{ 8b4dc8 8b45e4 0b45dc 7528 8bc1 0bc2 7522 }
$sequence_7hex{ 8b7508 8bc2 c1e804 2401 88868e0d0000 f6c210 7406 }
$sequence_8hex{ 8bf8 83c40c 85ff 0f8527020000 83bdd8feffff00 7529 68???????? }
$sequence_9hex{ 8b4510 85c0 8b4d0c 8b5514 53 8b5d08 56 }

Condition

7 of them and filesize < 8692736

In plain words (Heuristic)

  • The file must be smaller than 8692736 (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: 63e758ee-e47a-5b6d-9f31-91407ed4d575

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