MALPEDIA_Win_Bolek_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_Bolek_Auto: FILE {
  meta:
    description        = "autogenerated rule brought to you by yara-signator"
    author             = "Felix Bilstein - yara-signator at cocacoding dot com"
    id                 = "21f1a0ba-06a1-5668-aea4-333af031f0f6"
    date               = "2023-12-06"
    modified           = "2023-12-08"
    reference          = "https://malpedia.caad.fkie.fraunhofer.de/details/win.bolek"
    source_url         = "https://github.com/malpedia/signator-rules//blob/fbacfc09b84d53d410385e66a8e56f25016c588a/rules/win.bolek_auto.yar#L1-L134"
    license_url        = "N/A"
    logic_hash         = "28c372302adc63618e82259e643572bec2793a354bb442ed761054ecd6bf8112"
    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 = { 89 4c 24 54 8b c7 8b 8c 24 ac 00 00 00 8b df 0f ac c8 08 33 ed c1 e3 18 }
    $sequence_1 = { 3b 31 72 e1 51 e8 ?? ?? ?? ?? 59 8b c7 5f }
    $sequence_2 = { 8b cd 0f a4 c1 17 0b f9 c1 e0 17 0b d8 8b cd 8b 44 24 60 }
    $sequence_3 = { 8d 86 f4 00 00 00 50 e8 ?? ?? ?? ?? 83 c4 18 56 68 80 00 00 00 ff 75 0c }
    $sequence_4 = { dd 44 24 18 dc 0d ?? ?? ?? ?? dd 1c 24 68 ?? ?? ?? ?? 8b 1d ?? ?? ?? ?? 8d 44 24 2c 6a 40 }
    $sequence_5 = { eb 7a 3c 03 0f 85 bf 00 00 00 53 6a 01 8d 44 24 28 50 }
    $sequence_6 = { 85 c9 74 6f 80 39 00 74 6a 6a 2c 51 89 0f }
    $sequence_7 = { e8 ?? ?? ?? ?? eb 07 81 4f 7c 00 04 00 00 5f 5e 5d 5b }
    $sequence_8 = { 89 44 8c 20 41 83 c3 04 eb d0 8b ac 24 34 03 00 00 8b 9c 24 30 03 00 00 85 db }
    $sequence_9 = { 83 e4 f8 83 ec 68 83 64 24 20 00 83 64 24 24 00 8b 45 0c c7 44 24 10 01 23 45 67 c7 44 24 14 89 ab cd ef }

  condition:
    7 of them and filesize < 892928
}

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

76e9786d-2bc8-4691-9464-c67c90a8d935

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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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