MALPEDIA_Win_Lemonduck_Auto

YARA detection rule by Felix Bilstein - yara-signator at cocacoding dot com · GPL-2.0

autogenerated rule brought to you by yara-signator

rule MALPEDIA_Win_Lemonduck_Auto: FILE {
  meta:
    description        = "autogenerated rule brought to you by yara-signator"
    author             = "Felix Bilstein - yara-signator at cocacoding dot com"
    id                 = "731c6313-f288-5766-8bd2-365369510b0a"
    date               = "2023-12-06"
    modified           = "2023-12-08"
    reference          = "https://malpedia.caad.fkie.fraunhofer.de/details/win.lemonduck"
    source_url         = "https://github.com/malpedia/signator-rules//blob/fbacfc09b84d53d410385e66a8e56f25016c588a/rules/win.lemonduck_auto.yar#L1-L114"
    license_url        = "N/A"
    logic_hash         = "45ef0f5ff171ed9ba03997994f483fd024a13ee436b3a8cb1b81df72104021e2"
    score              = 75
    quality            = 75
    tags               = "FILE"
    version            = "1"
    tool               = "yara-signator v0.6.0"
    signator_config    = "callsandjumps;datarefs;binvalue"
    malpedia_rule_date = "20231130"
    malpedia_hash      = "fc8a0e9f343f6d6ded9e7df1a64dac0cc68d7351"
    malpedia_version   = "20230808"
    malpedia_license   = "CC BY-SA 4.0"
    malpedia_sharing   = "TLP:WHITE"

  strings:
    $sequence_0 = { 41 c1 e0 18 42 33 0c 22 45 0b c8 46 33 4c 22 04 44 33 d9 41 0f b6 46 25 45 33 d1 }
    $sequence_1 = { 48 8b 7c 24 30 33 c0 48 89 83 a0 00 00 00 48 89 83 a8 00 00 00 48 89 83 b0 00 00 00 48 89 83 b8 00 00 00 48 89 83 c0 00 00 00 }
    $sequence_2 = { 41 8b c0 80 f9 09 41 0f 47 c2 02 c1 41 88 41 02 41 0f b6 4d 01 80 e1 0f }
    $sequence_3 = { 48 8b 89 d8 00 00 00 48 89 6c 24 38 48 89 74 24 40 48 83 f9 ff 74 14 ff 15 ?? ?? ?? ?? 8b 47 58 }
    $sequence_4 = { 48 8d 15 d2 28 0a 00 48 8b cb ff 15 ?? ?? ?? ?? 48 89 05 ?? ?? ?? ?? 48 85 c0 0f 84 74 01 00 00 48 8d 15 9a 28 0a 00 }
    $sequence_5 = { 48 8d 05 c6 ba 00 00 48 89 05 ?? ?? ?? ?? 48 8d 05 58 c7 00 00 48 89 05 ?? ?? ?? ?? 48 8d 05 ba d2 00 00 48 89 05 ?? ?? ?? ?? 48 8d 05 4c e3 00 00 }
    $sequence_6 = { 41 c1 e9 08 41 0f b6 c7 41 c1 ef 08 41 8b b4 8a 50 95 16 00 40 0f b6 cf 45 8b a4 82 50 95 16 00 41 0f b6 c6 }
    $sequence_7 = { 48 2b c1 48 83 c0 f8 48 83 f8 1f 0f 87 98 00 00 00 ba 4f 00 01 00 e8 ?? ?? ?? ?? 90 }

  condition:
    7 of them and filesize < 10011648
}

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

b3ee9d72-bed2-488d-abe9-0c8e75ef3541

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Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

[[ reason ]]

What does this mean?

Format & documentation suggestions

Not a security issue — this rule is valid and was accepted as-is. These are optional fields/conventions its own format recommends, mainly affecting its quality score and how well it documents itself for other reviewers.

[[ reason ]]

What do these messages mean?

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

[[ currentRule.title ]]

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