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MALPEDIA_Win_Nabucur_Auto

autogenerated rule brought to you by yara-signator

MalwareNabucurMalpedia 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: Nabucur.

It defines 16 patterns (0 text, 16 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-nabucur-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Nabucur_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "30149a16-f5f4-5678-9c69-fb692298335c"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.nabucur"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.nabucur_auto.yar#L1-L159"
		license_url = "N/A"
		logic_hash = "2b7c3d756500fa20c23843b84a9086b4c85fb7c4fe41352a8b5ff7a1dfee359e"
		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 = { 48 894500 85c0 7fee }
		$sequence_1 = { 49 23cf 894c241c 3bc3 }
		$sequence_2 = { 33ff 33f6 4a c744244001000000 89542434 8b6c2438 }
		$sequence_3 = { 49 23cb 894d08 5d }
		$sequence_4 = { 009eaa030000 0fb686aa030000 57 83f80a 0f876d010000 }
		$sequence_5 = { 49 03d3 40 85c9 }
		$sequence_6 = { 49 23ce 894f18 8bf0 85c0 0f8521040000 }
		$sequence_7 = { 49 3b442430 891e 8944241c }
		$sequence_8 = { bb95c9c7fe e8???????? 81f2cf3a3100 81f3db2737fd }
		$sequence_9 = { e9???????? 837d0c00 750c ffb5a4fdffff 8f05???????? }
		$sequence_10 = { baaf746bf8 81f2d2b424fb e8???????? 81f2e5b3d7f7 bbee904bf8 }
		$sequence_11 = { 8706 85c0 75f5 61 c3 60 }
		$sequence_12 = { 2d4c67d056 0e 67389db266 d07d0b 80ab140ee42859 }
		$sequence_13 = { bbb76d15f9 e8???????? bb1ddfc5f7 81f2560b5efd ba3be69bfc }
		$sequence_14 = { bafa2649fd 83f901 7db6 ba8fb4a3fb ebb8 83e904 }
		$sequence_15 = { a1???????? a6 48 207b98 }

	condition:
		7 of them and filesize < 1949696
}

Strings (16 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 48 894500 85c0 7fee }
$sequence_1hex{ 49 23cf 894c241c 3bc3 }
$sequence_2hex{ 33ff 33f6 4a c744244001000000 89542434 8b6c2438 }
$sequence_3hex{ 49 23cb 894d08 5d }
$sequence_4hex{ 009eaa030000 0fb686aa030000 57 83f80a 0f876d010000 }
$sequence_5hex{ 49 03d3 40 85c9 }
$sequence_6hex{ 49 23ce 894f18 8bf0 85c0 0f8521040000 }
$sequence_7hex{ 49 3b442430 891e 8944241c }
$sequence_8hex{ bb95c9c7fe e8???????? 81f2cf3a3100 81f3db2737fd }
$sequence_9hex{ e9???????? 837d0c00 750c ffb5a4fdffff 8f05???????? }
$sequence_10hex{ baaf746bf8 81f2d2b424fb e8???????? 81f2e5b3d7f7 bbee904bf8 }
$sequence_11hex{ 8706 85c0 75f5 61 c3 60 }
$sequence_12hex{ 2d4c67d056 0e 67389db266 d07d0b 80ab140ee42859 }
$sequence_13hex{ bbb76d15f9 e8???????? bb1ddfc5f7 81f2560b5efd ba3be69bfc }
$sequence_14hex{ bafa2649fd 83f901 7db6 ba8fb4a3fb ebb8 83e904 }
$sequence_15hex{ a1???????? a6 48 207b98 }

Condition

7 of them and filesize < 1949696

In plain words (Heuristic)

  • The file must be smaller than 1949696 (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: 30149a16-f5f4-5678-9c69-fb692298335c

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