MALPEDIA_Win_Heyoka_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_Heyoka_Auto: FILE {
  meta:
    description        = "autogenerated rule brought to you by yara-signator"
    author             = "Felix Bilstein - yara-signator at cocacoding dot com"
    id                 = "86cada76-df01-530f-8812-d25a9cd3eeea"
    date               = "2023-12-06"
    modified           = "2023-12-08"
    reference          = "https://malpedia.caad.fkie.fraunhofer.de/details/win.heyoka"
    source_url         = "https://github.com/malpedia/signator-rules//blob/fbacfc09b84d53d410385e66a8e56f25016c588a/rules/win.heyoka_auto.yar#L1-L129"
    license_url        = "N/A"
    logic_hash         = "a93bcd2aa0b2cb88631752f25ba4416145dab56370097ba7d811f589f6be863b"
    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 = { 8b 4d 0c 8b 51 0c 83 c2 04 52 8b 45 fc 50 }
    $sequence_1 = { c7 45 f8 00 00 00 00 c7 45 f0 00 00 00 00 c7 45 f4 00 00 00 00 c7 45 ec 00 00 00 00 8b 45 14 6b c0 05 c1 e8 03 }
    $sequence_2 = { 8b 45 dc 50 e8 ?? ?? ?? ?? 83 c4 10 89 45 d8 83 7d d8 00 75 0c }
    $sequence_3 = { 83 ec 08 89 4d f8 8b 45 f8 c7 00 ?? ?? ?? ?? 8b 4d f8 c7 81 0c 09 00 00 00 00 00 00 8b 55 f8 }
    $sequence_4 = { e8 ?? ?? ?? ?? 83 c4 08 8b 55 18 52 8b 45 dc 83 c0 04 }
    $sequence_5 = { e8 ?? ?? ?? ?? 83 c4 08 eb 17 83 7d 08 03 75 11 68 ?? ?? ?? ?? }
    $sequence_6 = { 8b ec 83 ec 08 8b 45 08 50 6a 01 e8 ?? ?? ?? ?? 83 c4 08 }
    $sequence_7 = { 74 23 8b ce 8b c6 c1 f9 05 83 e0 1f 8b 0c 8d a0 d8 01 10 }
    $sequence_8 = { 51 e8 ?? ?? ?? ?? 83 c4 04 8b 45 e0 83 c0 0c 8b e5 }
    $sequence_9 = { 89 55 f8 8b 45 fc 8b 4d f4 8b 55 f8 0f af 94 81 34 e3 00 00 8b 4d f4 8b c2 }

  condition:
    7 of them and filesize < 270336
}

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

12b5197e-9223-4b94-bcef-5dcf91c45a8b

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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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