win_mistpen_auto

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

Detects win.mistpen.

rule win_mistpen_auto {

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

    


    strings:
        $sequence_0 = { c745d46b6c6d6e c745d86f707172 c745dc73747576 c745e07778797a }
                                                            
        $sequence_1 = { 89442420 e8???????? 4885db 7409 }
                                                            
        $sequence_2 = { c745cc63646566 c745d06768696a c745d46b6c6d6e c745d86f707172 c745dc73747576 c745e07778797a c745e430313233 }
                                                                                                
        $sequence_3 = { 03d1 8d0c92 f7eb 442bc1 }
                                                            
        $sequence_4 = { 33d2 488d8d10030000 41b808020000 e8???????? }
                                                            
        $sequence_5 = { 8b442440 41b812270000 89442420 e8???????? 4885db 7409 }
                                                                                    
        $sequence_6 = { 41b908000000 c7459038000000 4533c0 448965bc }
                                                            
        $sequence_7 = { 41b812270000 89442420 e8???????? 4885db 7409 488bcb ff15???????? }
                                                                                                
        $sequence_8 = { c1e91f 03d1 8d0c92 f7eb 442bc1 }
                                                                        
        $sequence_9 = { ff15???????? 488bf8 ff15???????? 8bc8 }
                                                            
    condition:
        7 of them and filesize < 458752
}

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

ac0c06d9-087b-47e1-a0ed-1d5ba7df59c2

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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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