win_zupdax_auto

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

Detects win.zupdax.

rule win_zupdax_auto {

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

    


    strings:
        $sequence_0 = { 6a00 51 e8???????? 83c418 8bc6 c3 }
                                                                                    
        $sequence_1 = { 765b 53 41 81e1ff000080 7908 49 81c900ffffff }
                                                                                                
        $sequence_2 = { 895e2c e8???????? 8b460c 83c404 }
                                                            
        $sequence_3 = { 68???????? ff15???????? 8d442444 83c0fe 668b4802 }
                                                                        
        $sequence_4 = { 83c408 8b4618 50 895e24 }
                                                            
        $sequence_5 = { e8???????? 8b560c 52 e8???????? 83c408 8b06 }
                                                                                    
        $sequence_6 = { e8???????? 8b15???????? a1???????? 668b0d???????? }
                                                            
        $sequence_7 = { 33db 57 3bc3 7419 8b4c2408 8b7e28 51 }
                                                                                                
        $sequence_8 = { 43 0fb61403 30142f 47 3b7c2418 72a7 }
                                                                                    
        $sequence_9 = { 51 8b4624 53 33db 57 3bc3 7419 }
                                                                                                
    condition:
        7 of them and filesize < 1032192
}

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

51555650-d841-472e-9e71-2774afd7430e

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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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