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MALPEDIA_Win_Murkytop_Auto

autogenerated rule brought to you by yara-signator

MalwareMurkytopMalpedia 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: Murkytop.

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

Summary generated from the rule's metadata and condition.

Rule source

win-murkytop-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Murkytop_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "1a665249-254d-5c04-9dec-672dd61ba6b1"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.murkytop"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.murkytop_auto.yar#L1-L127"
		license_url = "N/A"
		logic_hash = "401cb7ebf79c087a4975a12c90fb689e3e0df0a36ec46e807d1b933b33fbd494"
		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 = { 3b0cc508714100 740a 40 83f816 72ee 33c0 5d }
		$sequence_1 = { 897df4 ff15???????? 85c0 0f84d0000000 33c0 8945cc }
		$sequence_2 = { 51 6a00 6a03 52 56 57 ffd3 }
		$sequence_3 = { 50 ff15???????? eb3d 8b7df8 33db 3975fc }
		$sequence_4 = { ebeb 8bff 55 8bec 83ec4c 56 8d45b4 }
		$sequence_5 = { 8945c4 33c9 66894db0 8945b2 }
		$sequence_6 = { 56 8b35???????? 3bf0 7412 6a00 50 56 }
		$sequence_7 = { 8d0440 8d04851c000000 3901 7312 6a7a 8901 }
		$sequence_8 = { 68???????? 50 e8???????? 83c408 85c0 7513 68???????? }
		$sequence_9 = { c745d801000000 eb10 8b5de0 8b75dc 8b7de4 c745d800000000 }

	condition:
		7 of them and filesize < 294912
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 3b0cc508714100 740a 40 83f816 72ee 33c0 5d }
$sequence_1hex{ 897df4 ff15???????? 85c0 0f84d0000000 33c0 8945cc }
$sequence_2hex{ 51 6a00 6a03 52 56 57 ffd3 }
$sequence_3hex{ 50 ff15???????? eb3d 8b7df8 33db 3975fc }
$sequence_4hex{ ebeb 8bff 55 8bec 83ec4c 56 8d45b4 }
$sequence_5hex{ 8945c4 33c9 66894db0 8945b2 }
$sequence_6hex{ 56 8b35???????? 3bf0 7412 6a00 50 56 }
$sequence_7hex{ 8d0440 8d04851c000000 3901 7312 6a7a 8901 }
$sequence_8hex{ 68???????? 50 e8???????? 83c408 85c0 7513 68???????? }
$sequence_9hex{ c745d801000000 eb10 8b5de0 8b75dc 8b7de4 c745d800000000 }

Condition

7 of them and filesize < 294912

In plain words (Heuristic)

  • The file must be smaller than 294912 (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: 1a665249-254d-5c04-9dec-672dd61ba6b1

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