MALPEDIA_Win_Former_First_Rat_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_Former_First_Rat_Auto: FILE {
  meta:
    description        = "autogenerated rule brought to you by yara-signator"
    author             = "Felix Bilstein - yara-signator at cocacoding dot com"
    id                 = "e13a8bc3-e4cb-54c7-a2c1-b71b74a37c2c"
    date               = "2023-12-06"
    modified           = "2023-12-08"
    reference          = "https://malpedia.caad.fkie.fraunhofer.de/details/win.former_first_rat"
    source_url         = "https://github.com/malpedia/signator-rules//blob/fbacfc09b84d53d410385e66a8e56f25016c588a/rules/win.former_first_rat_auto.yar#L1-L167"
    license_url        = "N/A"
    logic_hash         = "79676675a5e0c5d1eb84217b80928525157e507544e18d7d0452685a540a1268"
    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 94 24 ec 03 00 00 89 8c 24 e8 03 00 00 8b 4f 10 8d 94 24 e8 03 00 00 6a 00 52 89 84 24 f8 03 00 00 }
    $sequence_1  = { 89 4c 24 0c 8b d3 3b c1 74 20 8d 64 24 00 8b f0 }
    $sequence_2  = { 52 bb 1c 00 00 00 8d 74 24 28 89 4c 24 5c c7 44 24 60 00 00 00 00 }
    $sequence_3  = { e8 ?? ?? ?? ?? 8b 8d 0c ff ff ff 68 ?? ?? ?? ?? 51 e8 ?? ?? ?? ?? }
    $sequence_4  = { ff 15 ?? ?? ?? ?? 33 c0 66 83 3d ?? ?? ?? ?? 09 0f 94 c0 a3 ?? ?? ?? ?? 68 08 02 00 00 }
    $sequence_5  = { c7 85 e8 fe ff ff 0f 00 00 00 89 9d ec fe ff ff 89 9d f0 fe ff ff 89 9d 04 ff ff ff 89 9d f4 fe ff ff }
    $sequence_6  = { e8 ?? ?? ?? ?? 8d 8d e0 fe ff ff 51 bb 08 00 00 00 e8 ?? ?? ?? ?? 8b 9d f8 fe ff ff 57 }
    $sequence_7  = { 8b f2 8b fb 81 c2 08 02 00 00 b9 82 00 00 00 81 c3 08 02 00 00 f3 a5 3b d0 }
    $sequence_8  = { 48 89 7c 24 28 48 8d 05 16 9b 02 00 48 89 07 48 8d 4f 08 e8 ?? ?? ?? ?? }
    $sequence_9  = { 48 0f 42 db 48 83 79 20 10 72 06 48 8b 49 08 eb 04 }
    $sequence_10 = { 48 83 7e 20 08 72 09 48 8b 4e 08 e8 ?? ?? ?? ?? 48 8d 46 08 }
    $sequence_11 = { 48 89 5c 24 68 0f 28 44 24 50 66 0f 7f 44 24 50 0f 28 4c 24 60 66 0f 7f 4c 24 60 }
    $sequence_12 = { 48 89 6c 24 60 40 88 6c 24 50 48 8b cb e8 ?? ?? ?? ?? }
    $sequence_13 = { 48 8d 47 54 48 89 47 60 48 83 21 00 48 8b 47 48 48 83 20 00 }
    $sequence_14 = { 90 48 01 7e 20 48 8b 76 20 48 81 c6 70 ff ff ff }
    $sequence_15 = { 48 8b 79 68 48 8d 05 32 80 02 00 8b f2 48 8b d9 }

  condition:
    7 of them and filesize < 626688
}

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

19f3bdc1-3c7c-481c-a8e8-a9c5d3549402

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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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