MALPEDIA_Win_Nemty_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_Nemty_Auto: FILE {
  meta:
    description        = "autogenerated rule brought to you by yara-signator"
    author             = "Felix Bilstein - yara-signator at cocacoding dot com"
    id                 = "63cde4fd-76ae-5ec0-8a56-1ffc39628f31"
    date               = "2023-12-06"
    modified           = "2023-12-08"
    reference          = "https://malpedia.caad.fkie.fraunhofer.de/details/win.nemty"
    source_url         = "https://github.com/malpedia/signator-rules//blob/fbacfc09b84d53d410385e66a8e56f25016c588a/rules/win.nemty_auto.yar#L1-L122"
    license_url        = "N/A"
    logic_hash         = "ab3eef0d79392145b4ed1a1315366f250ca5ff150cf5d778f7e9e8528f09f4dc"
    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 = { 51 e8 ?? ?? ?? ?? 59 e8 ?? ?? ?? ?? 83 c4 38 85 c0 }
    $sequence_1 = { 89 45 a4 a1 ?? ?? ?? ?? 59 bf ?? ?? ?? ?? 8b ca 83 f8 10 73 02 }
    $sequence_2 = { 81 ec 18 04 00 00 a1 ?? ?? ?? ?? 33 c5 89 45 fc 83 7d 20 10 8b 45 08 }
    $sequence_3 = { 83 78 14 08 8b 48 10 57 72 02 8b 00 8b 3d ?? ?? ?? ?? 33 db }
    $sequence_4 = { 6a 1c 99 5e f7 fe 33 db 89 5d d8 }
    $sequence_5 = { 33 ff e8 ?? ?? ?? ?? 83 c6 1c 3b 75 10 75 ef 6a 00 }
    $sequence_6 = { 83 ec 1c 8b d8 8b c4 68 ?? ?? ?? ?? e8 ?? ?? ?? ?? }
    $sequence_7 = { 8d b4 24 8c 00 00 00 e8 ?? ?? ?? ?? 53 8d 74 24 54 }
    $sequence_8 = { 75 09 be ?? ?? ?? ?? 85 c0 74 05 }
    $sequence_9 = { 83 7d 38 10 8b f8 8b 45 24 59 73 03 8d 45 24 83 7d 38 10 }

  condition:
    7 of them and filesize < 204800
}

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

c262e8f6-290d-49d4-b05b-37a73f27efa0

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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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