MALPEDIA_Win_Matsnu_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_Matsnu_Auto: FILE {
  meta:
    description        = "autogenerated rule brought to you by yara-signator"
    author             = "Felix Bilstein - yara-signator at cocacoding dot com"
    id                 = "c9a7bdf6-1deb-5130-82f0-9b1058e504ad"
    date               = "2023-12-06"
    modified           = "2023-12-08"
    reference          = "https://malpedia.caad.fkie.fraunhofer.de/details/win.matsnu"
    source_url         = "https://github.com/malpedia/signator-rules//blob/fbacfc09b84d53d410385e66a8e56f25016c588a/rules/win.matsnu_auto.yar#L1-L117"
    license_url        = "N/A"
    logic_hash         = "e4de93852a1879de4977ea1cd375165f9dcf6c32de8c352e98b35973d623758e"
    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 = { e9 ?? ?? ?? ?? 89 85 bc fb ff ff 83 bd b0 fb ff ff 01 0f 85 88 00 00 00 8b 85 bc fb ff ff 89 85 c4 fb ff ff 8b 85 c0 fb ff ff }
    $sequence_1 = { eb 04 c6 47 02 3d 83 7d 10 03 72 13 }
    $sequence_2 = { eb 04 c6 47 02 3d 83 7d 10 03 72 13 31 c0 8a 46 02 24 3f }
    $sequence_3 = { 8b 45 e0 3b 45 0c 0f 83 91 00 00 00 c7 45 e8 00 00 00 00 }
    $sequence_4 = { 75 0f c7 85 a4 fb ff ff 02 00 00 00 e9 ?? ?? ?? ?? 89 85 bc fb ff ff 83 bd b0 fb ff ff 01 0f 85 88 00 00 00 8b 85 bc fb ff ff }
    $sequence_5 = { 85 c0 0f 84 a6 00 00 00 89 45 fc 8b 45 e0 3b 45 0c }
    $sequence_6 = { c7 85 70 f3 ff ff 00 00 00 00 c7 85 74 f3 ff ff 00 00 00 00 c7 85 78 f3 ff ff 00 00 00 00 c7 85 7c f3 ff ff 00 00 00 00 }
    $sequence_7 = { 75 1d ff 45 da ba 00 00 00 00 8b 45 da }
    $sequence_8 = { 3b 45 ba 72 28 8b 7d 08 8b 47 04 3b 45 ba 75 1d }
    $sequence_9 = { 89 e5 81 ec 18 02 00 00 c7 85 e8 fd ff ff 00 00 00 00 c7 85 ec fd ff ff 00 00 00 00 c7 85 f0 fd ff ff 00 00 00 00 }

  condition:
    7 of them and filesize < 606992
}

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

a0d196cf-2f52-4d44-bae3-16f2f2feb59d

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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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