MALPEDIA_Win_Lurk_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_Lurk_Auto: FILE {
  meta:
    description        = "autogenerated rule brought to you by yara-signator"
    author             = "Felix Bilstein - yara-signator at cocacoding dot com"
    id                 = "67fdecf6-fece-5b5e-aa84-6821eaa887bc"
    date               = "2023-12-06"
    modified           = "2023-12-08"
    reference          = "https://malpedia.caad.fkie.fraunhofer.de/details/win.lurk"
    source_url         = "https://github.com/malpedia/signator-rules//blob/fbacfc09b84d53d410385e66a8e56f25016c588a/rules/win.lurk_auto.yar#L1-L180"
    license_url        = "N/A"
    logic_hash         = "1d68cad8f119a971efeb0a8c788b3983d9ce03607f838f5c4c4d29840d917af1"
    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  = { ff 75 08 ff 15 ?? ?? ?? ?? 8b 35 ?? ?? ?? ?? 50 ff 75 08 }
    $sequence_1  = { 8b 45 08 5b 5f 5e c9 c3 55 }
    $sequence_2  = { 8b 4d 08 8b 51 10 83 c2 01 8b 45 08 89 50 10 8b 4d ac 51 }
    $sequence_3  = { f3 a5 66 a5 33 db 39 5d 08 }
    $sequence_4  = { 72 cc 33 c9 8b c1 99 6a 0b 5f f7 ff }
    $sequence_5  = { c1 ee 03 33 ce eb 0e c1 e6 0b 33 ce 8b f0 c1 ee 05 }
    $sequence_6  = { 59 3b c7 75 34 0f be 42 03 }
    $sequence_7  = { 8b 3d ?? ?? ?? ?? 33 f6 bb 24 08 00 00 53 6a 40 89 75 ec }
    $sequence_8  = { ff 75 0c 83 ce ff ff 75 08 ff 75 10 e8 ?? ?? ?? ?? 83 c4 18 85 c0 }
    $sequence_9  = { ff 75 0c 57 ff 15 ?? ?? ?? ?? 85 c0 74 11 39 5d fc 75 0c }
    $sequence_10 = { 68 ?? ?? ?? ?? 8d 85 ec fe ff ff 50 ff 15 ?? ?? ?? ?? 8d 85 ec fe ff ff 50 }
    $sequence_11 = { eb f8 56 8b f0 33 c0 85 d2 8b ca 74 0c }
    $sequence_12 = { 89 45 fc 8b 4d 10 8b 91 a4 00 00 00 89 55 f8 83 7d f8 00 76 61 }
    $sequence_13 = { c9 c3 55 8b ec 81 ec 08 01 00 00 6a 35 6a 40 }
    $sequence_14 = { 74 4d 56 8d 45 08 50 }
    $sequence_15 = { 83 f8 66 75 67 3b f0 75 63 0f be 42 05 50 e8 ?? ?? ?? ?? }

  condition:
    7 of them and filesize < 5316608
}

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

7d03ab16-932b-486b-b850-6d05523c94c5

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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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