MALPEDIA_Win_Dadjoke_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_Dadjoke_Auto: FILE {
  meta:
    description        = "autogenerated rule brought to you by yara-signator"
    author             = "Felix Bilstein - yara-signator at cocacoding dot com"
    id                 = "62c26982-fdfa-5ead-84fa-82086121c261"
    date               = "2023-12-06"
    modified           = "2023-12-08"
    reference          = "https://malpedia.caad.fkie.fraunhofer.de/details/win.dadjoke"
    source_url         = "https://github.com/malpedia/signator-rules//blob/fbacfc09b84d53d410385e66a8e56f25016c588a/rules/win.dadjoke_auto.yar#L1-L224"
    license_url        = "N/A"
    logic_hash         = "551e5b1afd2fb8a5c55119844d05872b1d6fb1f0561b620ba9bad0b2cb1592e0"
    score              = 75
    quality            = 73
    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  = { 56 57 68 00 08 10 00 6a 00 }
    $sequence_1  = { 8b 55 bc 52 68 00 04 00 00 8d 85 18 f5 ff ff 50 e8 ?? ?? ?? ?? }
    $sequence_2  = { 3d 46 27 00 00 74 06 83 7d d8 00 75 2c }
    $sequence_3  = { 83 45 bc 01 80 7d f6 00 75 ed 8b 7d bc 8b b5 70 ff ff ff 8b 95 6c ff ff ff }
    $sequence_4  = { 6a 00 6a 00 ff 15 ?? ?? ?? ?? 89 45 c0 6a 00 6a 01 }
    $sequence_5  = { ff 15 ?? ?? ?? ?? 89 45 fc 8b 4d fc 51 e8 ?? ?? ?? ?? 83 c4 04 }
    $sequence_6  = { e8 ?? ?? ?? ?? 83 c4 0c 8d 8d 28 fd ff ff 51 e8 ?? ?? ?? ?? 83 c4 04 }
    $sequence_7  = { 5e c3 8b ff 55 8b ec 83 ec 10 33 c0 }
    $sequence_8  = { ff 15 ?? ?? ?? ?? 85 c0 74 17 b9 20 00 00 00 }
    $sequence_9  = { e8 ?? ?? ?? ?? c3 6a 04 e8 ?? ?? ?? ?? 59 c3 6a 0c }
    $sequence_10 = { 84 c0 0f 94 c1 8b c1 c3 a1 ?? ?? ?? ?? c3 8b ff }
    $sequence_11 = { e8 ?? ?? ?? ?? 83 c4 0c c7 45 8c 00 00 00 00 ff 15 ?? ?? ?? ?? 50 e8 ?? ?? ?? ?? }
    $sequence_12 = { 8b 3d ?? ?? ?? ?? 8b 1d ?? ?? ?? ?? 51 e8 ?? ?? ?? ?? 8b f0 83 c4 04 }
    $sequence_13 = { 6a 40 68 00 10 00 00 68 00 00 40 00 6a 00 }
    $sequence_14 = { 0f 84 d5 48 00 00 c3 83 3d ?? ?? ?? ?? ff 75 03 33 c0 }
    $sequence_15 = { 7c e7 8d 45 f4 c6 45 f8 00 33 db 8d 70 01 33 d2 }
    $sequence_16 = { 8b 85 e4 fa ff ff 8d 95 e0 fa ff ff 52 68 ?? ?? ?? ?? 50 8b 08 }
    $sequence_17 = { 8d 85 e4 fa ff ff 50 68 ?? ?? ?? ?? 6a 01 6a 00 68 ?? ?? ?? ?? ff 15 ?? ?? ?? ?? }
    $sequence_18 = { 88 44 35 f4 46 83 fe 04 7c e7 8d 45 f4 c6 45 f8 00 }
    $sequence_19 = { c7 45 fc 14 00 00 00 0f 11 06 89 46 10 8d 45 fc }
    $sequence_20 = { 5f 0f 44 ca 5b 8b c1 5e 5d c3 }
    $sequence_21 = { 83 e1 3f c1 f8 06 6b c9 30 8b 04 85 58 04 75 00 }

  condition:
    7 of them and filesize < 344064
}

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

9062fd8a-75bd-493e-9c46-8f90cb303835

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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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