win_hermes_ransom_auto

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

Detects win.hermes_ransom.

rule win_hermes_ransom_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-10-07"
        version = "1"
        description = "Detects win.hermes_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.hermes_ransom"
        malpedia_rule_date = "20211007"
        malpedia_hash = "e5b790e0f888f252d49063a1251ca60ec2832535"
        malpedia_version = "20211008"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    


    strings:
        $sequence_0 = { 59 59 8945e0 837ddc00 7506 837de000 7405 }
                                                                                                
        $sequence_1 = { 8d45dc 50 ff75d8 8d8560ffffff 50 ff75e0 ff15???????? }
                                                                                                
        $sequence_2 = { 33c0 668945e2 33c0 8945e4 8945e8 837df020 }
                                                                                    
        $sequence_3 = { 6a00 8d85a4f9ffff 50 ff15???????? 5f 5e 8be5 }
                                                                                                
        $sequence_4 = { 0fb7844504f7ffff 83f83b 741f 8b45d8 8b4df0 668b8c4d04f7ffff }
                                                                                    
        $sequence_5 = { 8365c800 8365d000 c745b840420f00 8365e000 eb07 8b45e0 40 }
                                                                                                
        $sequence_6 = { 59 6bc900 668981e8c34000 6a02 }
                                                            
        $sequence_7 = { 59 59 6a0f 6a00 8d45bc 50 }
                                                                                    
        $sequence_8 = { 8365f000 8b45f0 8945f8 837df800 7456 }
                                                                        
        $sequence_9 = { 83e002 7415 ff750c ff75fc e8???????? 59 }
                                                                                    
    condition:
        7 of them and filesize < 7192576
}

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

702ab362-2fdf-427e-94f5-001c6963a4c8

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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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