win_cryptoshield_auto

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

Detects win.cryptoshield.

rule win_cryptoshield_auto {

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

    


    strings:
        $sequence_0 = { 83fe03 7413 83fe02 740e 83fe04 }
                                                                        
        $sequence_1 = { 83f801 7409 83f802 0f85a5000000 be02000000 8bc6 5e }
                                                                                                
        $sequence_2 = { ff15???????? 85c0 0f8487000000 8b4508 }
                                                            
        $sequence_3 = { 66833800 740c 0fb77202 83c202 6685f6 }
                                                                        
        $sequence_4 = { 8d85b0fbffff 50 c785ccfbffff00000000 ff15???????? 85c0 752f ff15???????? }
                                                                                                
        $sequence_5 = { 68???????? 50 ffd6 83c40c 8d45f0 6a00 }
                                                                                    
        $sequence_6 = { 0f84a6000000 8d45fc 50 6a01 ff75f8 6810660000 }
                                                                                    
        $sequence_7 = { 33c0 8d95f4fdffff 6685c9 7417 0fb7c9 90 c1c007 }
                                                                                                
        $sequence_8 = { be02000000 8bc6 5e 8b4dfc 33cd }
                                                                        
        $sequence_9 = { 8d4900 0fb706 8bd6 6685c0 743b 8bf0 }
                                                                                    
    condition:
        7 of them and filesize < 131072
}

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

043f2f10-8565-4a0f-8f69-b5df5ece6518

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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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