win_spora_ransom_auto

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

Detects win.spora_ransom.

rule win_spora_ransom_auto {

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

    


    strings:
        $sequence_0 = { 8d45fc 50 68???????? 57 e8???????? 85c0 740e }
                                                                                                
        $sequence_1 = { b001 ebf5 b002 ebf1 b003 }
                                                                        
        $sequence_2 = { 0bf0 57 ff15???????? 5f 8bc6 5e }
                                                                                    
        $sequence_3 = { 85c0 7436 03fb 83ff0c 72ec 33ff }
                                                                                    
        $sequence_4 = { 6a01 6810660000 ff35???????? ff15???????? 85c0 }
                                                                        
        $sequence_5 = { 72e4 33c0 5e c20400 33c0 40 ebf7 }
                                                                                                
        $sequence_6 = { be00400000 56 6a40 ffd3 8bf8 }
                                                                        
        $sequence_7 = { 8bf0 85f6 7445 8365fc00 8d45fc 50 }
                                                                                    
        $sequence_8 = { 740e 8b45fc 8b4010 0fb6f0 }
                                                            
        $sequence_9 = { ff15???????? 85c0 7466 56 57 bf00020000 57 }
                                                                                                
    condition:
        7 of them and filesize < 73728
}

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

e218e84a-e925-4504-b69c-c091ddd9e6ba

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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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