win_rctrl_auto

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

Detects win.rctrl.

rule win_rctrl_auto {

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

    


    strings:
        $sequence_0 = { 8bec 8b4508 57 8d3c85d0235d00 8b0f 85c9 740b }
                                                                                                
        $sequence_1 = { 6804100000 6a00 50 e8???????? 83c40c c784242810000027000000 89742434 }
                                                                                                
        $sequence_2 = { c745c07cb85700 c745c864000000 8bb064010000 8bce e8???????? }
                                                                        
        $sequence_3 = { 50 e8???????? 83c40c c784242810000027000000 8d442428 6800100000 6a00 }
                                                                                                
        $sequence_4 = { ff7004 ff75d0 e8???????? ff75b8 ff15???????? 8d4de4 c745e470535700 }
                                                                                                
        $sequence_5 = { e8???????? a1???????? 33c4 89842414100000 56 }
                                                                        
        $sequence_6 = { 8bf0 6a00 56 e8???????? 8dbde0edffff 83c410 }
                                                                                    
        $sequence_7 = { 33c4 89842490180000 53 8b5d0c 56 8b7508 57 }
                                                                                                
        $sequence_8 = { c3 6a40 b8???????? e8???????? 8bf1 8b86b4000000 }
                                                                                    
        $sequence_9 = { c20400 56 ff15???????? 56 8bd8 ff15???????? ff15???????? }
                                                                                                
    condition:
        7 of them and filesize < 4315136
}

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

22ca5da9-1c5c-416b-b020-5f44c5de483a

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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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