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MALPEDIA_Win_Lightbunny_Auto

autogenerated rule brought to you by yara-signator

MalwareLightbunnyMalpedia 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: Lightbunny.

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

Summary generated from the rule's metadata and condition.

Rule source

win-lightbunny-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Lightbunny_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "491abd88-264d-5174-b68e-6a49e576be31"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.lightbunny"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.lightbunny_auto.yar#L1-L120"
		license_url = "N/A"
		logic_hash = "3bfa9381ef16fc7f71576ea10bafafbc4e1a2b451ef40236a4ce0ffb3b23b53f"
		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 = { 837d0803 8b450c 56 57 7d0c ff30 68???????? }
		$sequence_1 = { 2bf0 03f8 85f6 7fe1 ff15???????? a3???????? 8b45ec }
		$sequence_2 = { e8???????? 83c404 85c0 740f c70600000000 }
		$sequence_3 = { 52 68???????? e8???????? 83c40c 6a02 ff7608 }
		$sequence_4 = { 7420 6bc618 57 8db840b04100 57 }
		$sequence_5 = { 51 ba02000000 e8???????? 83c404 }
		$sequence_6 = { ff75f4 68???????? e8???????? 8b4df4 83c40c }
		$sequence_7 = { 89bdf4fcffff c785f0fcffff01000000 8d85e4fcffff 89bdfcfeffff }
		$sequence_8 = { 8bf1 ff15???????? 894614 83f8ff 751e 68???????? e8???????? }
		$sequence_9 = { 8b148520ae4100 8a4c1a2d f6c104 7419 8a441a2e 80e1fb }

	condition:
		7 of them and filesize < 2376704
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 837d0803 8b450c 56 57 7d0c ff30 68???????? }
$sequence_1hex{ 2bf0 03f8 85f6 7fe1 ff15???????? a3???????? 8b45ec }
$sequence_2hex{ e8???????? 83c404 85c0 740f c70600000000 }
$sequence_3hex{ 52 68???????? e8???????? 83c40c 6a02 ff7608 }
$sequence_4hex{ 7420 6bc618 57 8db840b04100 57 }
$sequence_5hex{ 51 ba02000000 e8???????? 83c404 }
$sequence_6hex{ ff75f4 68???????? e8???????? 8b4df4 83c40c }
$sequence_7hex{ 89bdf4fcffff c785f0fcffff01000000 8d85e4fcffff 89bdfcfeffff }
$sequence_8hex{ 8bf1 ff15???????? 894614 83f8ff 751e 68???????? e8???????? }
$sequence_9hex{ 8b148520ae4100 8a4c1a2d f6c104 7419 8a441a2e 80e1fb }

Condition

7 of them and filesize < 2376704

In plain words (Heuristic)

  • The file must be smaller than 2376704 (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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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: 491abd88-264d-5174-b68e-6a49e576be31

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