win_fakeword_auto

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

Detects win.fakeword.

rule win_fakeword_auto {

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

    


    strings:
        $sequence_0 = { 4f 89442430 3bc7 0f8654ffffff 5f 8bc3 }
                                                                                    
        $sequence_1 = { 6880000000 50 ff15???????? f644242810 }
                                                            
        $sequence_2 = { 8d8d48eeffff 8d9548deffff 51 52 e8???????? 83c408 a1???????? }
                                                                                                
        $sequence_3 = { 81c484000000 c3 6800000002 6a00 6a01 ff15???????? 8bf0 }
                                                                                                
        $sequence_4 = { 8bf1 81e200000020 81e600000040 81e100000080 85d2 7408 808c045401000001 }
                                                                                                
        $sequence_5 = { 6a02 6a00 6800f005ff 57 ffd6 6a02 6a00 }
                                                                                                
        $sequence_6 = { ff15???????? 8b4c2410 8d44242c 50 51 ff15???????? 85c0 }
                                                                                                
        $sequence_7 = { 50 55 8d7704 6a51 68???????? 56 }
                                                                                    
        $sequence_8 = { 83c43c 3bfb 7606 5f 5e 33c0 5b }
                                                                                                
        $sequence_9 = { 8a0c0f 81e1ff000000 c1e104 33c1 33c9 8a4c3a02 c1e004 }
                                                                                                
    condition:
        7 of them and filesize < 98304
}

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

6787827f-a1d4-40d3-a996-bb5c16a57f23

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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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