win_cotx_auto

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

Detects win.cotx.

rule win_cotx_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.cotx."
        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.cotx"
        malpedia_rule_date = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    


    strings:
        $sequence_0 = { e8???????? b906010200 85c0 0f45f1 }
                                                            
        $sequence_1 = { 8d85bcebffff 50 e8???????? 8d8dbcebffff }
                                                            
        $sequence_2 = { 50 e8???????? 8d85bce3ffff 50 }
                                                            
        $sequence_3 = { c705????????92d61819 c705????????0c56aef3 c705????????c8a4ea05 c705????????69e053a4 }
                                                            
        $sequence_4 = { c785d8feffff74726f6c c785dcfeffff6c65722e c785e0feffff6578652e 66c785e4feffff696e c685e6feffff69 e8???????? }
                                                                                    
        $sequence_5 = { 740e 3d10b6afa6 7407 3d36ce164d }
                                                            
        $sequence_6 = { 50 8d85bcfbffff 50 8d85bcebffff }
                                                            
        $sequence_7 = { ff15???????? 8d85bcf3ffff 50 ff15???????? 8d85bcf3ffff 6a2e 50 }
                                                                                                
        $sequence_8 = { c705????????d468bcb5 c705????????a1a14538 c705????????2086e659 c705????????eec45abf }
                                                            
        $sequence_9 = { 50 56 6a00 57 53 ff15???????? 85c0 }
                                                                                                
    condition:
        7 of them and filesize < 1171456
}

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

f16c3aa6-359d-49c7-9870-597e0fe1dee4

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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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