win_rakhni_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 win_rakhni_auto {
  meta:
    author             = "Felix Bilstein - yara-signator at cocacoding dot com"
    date               = "2020-10-14"
    version            = "1"
    description        = "autogenerated rule brought to you by yara-signator"
    tool               = "yara-signator v0.5.0"
    signator_config    = "callsandjumps;datarefs;binvalue"
    malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.rakhni"
    malpedia_rule_date = "20201014"
    malpedia_hash      = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
    malpedia_version   = "20201014"
    malpedia_license   = "CC BY-SA 4.0"
    malpedia_sharing   = "TLP:WHITE"
  

  strings:
    $sequence_0 = { 50 8b 83 a8 00 00 00 8b 4d fc 0f b7 55 ea e8 ?? ?? ?? ?? 8b 4d a8 8b 83 d0 00 00 00 }
                                    $sequence_1 = { 50 8d 55 c8 b8 ?? ?? ?? ?? e8 ?? ?? ?? ?? 59 8b 55 c8 8b 45 f4 }
                                    $sequence_2 = { 8b 45 d8 8b 15 ?? ?? ?? ?? e8 ?? ?? ?? ?? 84 c0 74 10 8d 45 ec 8b 55 f4 }
                                    $sequence_3 = { e8 ?? ?? ?? ?? 83 7d f8 00 74 60 6a 00 }
                        $sequence_4 = { 85 c0 74 05 83 e8 04 8b 00 3b d0 7e 23 8b c6 }
                                    $sequence_5 = { 8b c6 e8 ?? ?? ?? ?? 8d 86 b0 00 00 00 8b 55 08 e8 ?? ?? ?? ?? c6 86 b4 00 00 00 01 8b c6 }
                                    $sequence_6 = { e8 ?? ?? ?? ?? 8b 55 f8 83 c9 ff 8b c6 e8 ?? ?? ?? ?? 66 3d fa 00 75 32 }
                                    $sequence_7 = { e8 ?? ?? ?? ?? 8b 85 5c ff ff ff e8 ?? ?? ?? ?? 50 8d 95 58 ff ff ff b8 ?? ?? ?? ?? e8 ?? ?? ?? ?? }
                                    $sequence_8 = { 8b c7 e8 ?? ?? ?? ?? 83 78 0c 00 75 25 46 4b 75 ed }
                                    $sequence_9 = { 8b d8 33 c0 89 06 66 83 bb ca 00 00 00 00 }
          
  condition:
    7 of them and filesize < 7847936
}

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

64c2a07b-e91e-49d0-8e5d-5aa8b44bce2d

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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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