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MALPEDIA_Win_Luca_Stealer_Auto

autogenerated rule brought to you by yara-signator

MalwareLuca StealerMalpedia 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: Luca Stealer.

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

Summary generated from the rule's metadata and condition.

Rule source

win-luca-stealer-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Luca_Stealer_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "81eb348b-f124-5d26-b1c2-7e3e37f1bf20"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.luca_stealer"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.luca_stealer_auto.yar#L1-L134"
		license_url = "N/A"
		logic_hash = "220473227abc72c99d81b0cfabfdcee10a55ec183eac9d22662cf4b5b2976137"
		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 = { ffca 4889f9 41b805000000 e8???????? 488d0d7f3d2a00 31c0 4883f813 }
		$sequence_1 = { e8???????? b900040000 4885c9 7411 488903 48895308 4883c310 }
		$sequence_2 = { e8???????? 498bcc 8bd8 e8???????? 448ba42488000000 85db 790e }
		$sequence_3 = { e9???????? 48895c2408 4889742410 57 4883ec20 488b5930 488bf9 }
		$sequence_4 = { ff15???????? 33f6 48894310 4885c0 0f844e020000 488d4db0 4533c9 }
		$sequence_5 = { e9???????? 48898fd0020000 48898fd8020000 388f2c020000 745f 488daf30020000 488bcd }
		$sequence_6 = { c1e804 22c3 8887560e0000 f6c110 7406 83e1ef 83c902 }
		$sequence_7 = { f348a5 837d0003 4889e9 0f84330e0000 4889ce e8???????? 48c70603000000 }
		$sequence_8 = { e8???????? 4885c0 0f85c5210000 488d4c2460 4889da e8???????? 48837c246000 }
		$sequence_9 = { 8bd8 488dbeb8020000 740d 834f1002 eb07 488dbeb8020000 85c0 }

	condition:
		7 of them and filesize < 9285632
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ ffca 4889f9 41b805000000 e8???????? 488d0d7f3d2a00 31c0 4883f813 }
$sequence_1hex{ e8???????? b900040000 4885c9 7411 488903 48895308 4883c310 }
$sequence_2hex{ e8???????? 498bcc 8bd8 e8???????? 448ba42488000000 85db 790e }
$sequence_3hex{ e9???????? 48895c2408 4889742410 57 4883ec20 488b5930 488bf9 }
$sequence_4hex{ ff15???????? 33f6 48894310 4885c0 0f844e020000 488d4db0 4533c9 }
$sequence_5hex{ e9???????? 48898fd0020000 48898fd8020000 388f2c020000 745f 488daf30020000 488bcd }
$sequence_6hex{ c1e804 22c3 8887560e0000 f6c110 7406 83e1ef 83c902 }
$sequence_7hex{ f348a5 837d0003 4889e9 0f84330e0000 4889ce e8???????? 48c70603000000 }
$sequence_8hex{ e8???????? 4885c0 0f85c5210000 488d4c2460 4889da e8???????? 48837c246000 }
$sequence_9hex{ 8bd8 488dbeb8020000 740d 834f1002 eb07 488dbeb8020000 85c0 }

Condition

7 of them and filesize < 9285632

In plain words (Heuristic)

  • The file must be smaller than 9285632 (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: 81eb348b-f124-5d26-b1c2-7e3e37f1bf20

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