win_crutch_auto

YARA detection rule by Felix Bilstein - yara-signator at cocacoding dot com

Detects win.crutch.

rule win_crutch_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.crutch."
        info = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.6.0"
        signator_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.crutch"
        malpedia_rule_date = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    


    strings:
        $sequence_0 = { 8d45a8 50 e8???????? 57 e8???????? 59 ff75b0 }
                                                                                                
        $sequence_1 = { 8b908c030000 8911 33c0 c3 8b80b04a0000 8901 33c0 }
                                                                                                
        $sequence_2 = { 0fb680805b0110 ff24855c5b0110 b8???????? eb36 b8???????? eb2f b8???????? }
                                                                                                
        $sequence_3 = { 8b8394070000 8b4918 8d542410 52 }
                                                            
        $sequence_4 = { 8b8528e5ffff 8b0c8588980710 8b8524e5ffff f644080480 0f8475030000 8b9530e5ffff 33ff }
                                                                                                
        $sequence_5 = { 52 8d542440 52 8b5038 8b00 51 53 }
                                                                                                
        $sequence_6 = { 8b8fe8030000 51 ffd0 83c410 3bc3 0f8477010000 }
                                                                                    
        $sequence_7 = { 8be5 5d c20400 6a74 b8???????? }
                                                                        
        $sequence_8 = { 8b542420 33c0 3919 5f 0f95c0 5e 8982e0030000 }
                                                                                                
        $sequence_9 = { 8bc3 899df4feffff 888405fcfeffff 40 3d00010000 7cf1 899df0feffff }
                                                                                                
    condition:
        7 of them and filesize < 1067008
}

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

a792f95b-a3dc-4213-bdaf-2fb0f50757b2

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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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