win_servhelper_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_servhelper_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.servhelper"
    malpedia_rule_date = "20201014"
    malpedia_hash      = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
    malpedia_version   = "20201014"
    malpedia_license   = "CC BY-SA 4.0"
    malpedia_sharing   = "TLP:WHITE"
  

  strings:
    $sequence_0  = { e8 ?? ?? ?? ?? b8 ?? ?? ?? ?? b9 d9 d6 00 00 8b 15 ?? ?? ?? ?? e8 ?? ?? ?? ?? }
                            $sequence_1  = { 80 7d a1 01 75 0b 8d 53 24 8b 46 44 e8 ?? ?? ?? ?? 83 7b 30 00 75 06 }
                                    $sequence_2  = { 8b f8 8b c7 e8 ?? ?? ?? ?? 85 ff 75 ec 8b 46 04 }
                                $sequence_3  = { 84 c0 74 06 66 b8 22 00 eb 04 }
                        $sequence_4  = { 89 45 dc 33 c0 89 45 e0 8d 45 d4 8b 4d fc ba ?? ?? ?? ?? }
                                $sequence_5  = { 8b f0 e8 ?? ?? ?? ?? 3d b7 00 00 00 75 0a }
                        $sequence_6  = { 13 49 00 4e 00 46 00 4e 00 41 00 4e 00 ac 08 c0 75 03 b0 }
                                    $sequence_7  = { 1b 55 d4 52 50 8b c6 }
                        $sequence_8  = { 77 00 69 00 6e 00 68 00 74 00 74 00 70 00 2e 00 64 00 6c }
                                $sequence_9  = { 8b 58 fc 48 8b 09 e8 ?? ?? ?? ?? }
                        $sequence_10 = { 8b 58 fc 48 0f b7 45 42 66 89 45 48 }
                        $sequence_11 = { 8b 58 f8 48 8b 45 38 48 8d 34 18 48 }
                                $sequence_12 = { 8b 58 fc 48 8b 45 20 48 }
                        $sequence_13 = { 8b 58 f8 48 8b 45 48 48 }
                        $sequence_14 = { 8b 58 fc 48 89 d1 e8 ?? ?? ?? ?? }
          
  condition:
    7 of them and filesize < 6717440
}

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

4a74f4c1-8a5f-4a11-a4b6-fb79a9558bf8

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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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