win_makop_ransomware_auto

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

Detects win.makop_ransomware.

rule win_makop_ransomware_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.makop_ransomware."
        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.makop_ransomware"
        malpedia_rule_date = "20230705"
        malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
        malpedia_version = "20230715"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    


    strings:
        $sequence_0 = { eb02 33f6 803d????????00 751f 803d????????00 7516 80fb01 }
                                                                                                
        $sequence_1 = { 52 50 51 e8???????? 8b542430 83c40c 68e0930400 }
                                                                                                
        $sequence_2 = { 52 66c7060802 66c746041066 c6460820 }
                                                            
        $sequence_3 = { 56 ff15???????? 85c0 750b 8906 32c0 5e }
                                                                                                
        $sequence_4 = { 83c001 84c9 75f7 2bc7 83e801 39442404 720a }
                                                                                                
        $sequence_5 = { ffd6 85ff 740f 85db 740b 837c242000 7404 }
                                                                                                
        $sequence_6 = { 8b2d???????? 3beb 742e 8b4524 3bc3 7407 50 }
                                                                                                
        $sequence_7 = { 7416 e8???????? 6a00 e8???????? 83c404 }
                                                                        
        $sequence_8 = { e8???????? 8b442418 83c40c 8b4f0c }
                                                            
        $sequence_9 = { 742f 33c0 3906 763d 8d4c2448 }
                                                                        
    condition:
        7 of them and filesize < 107520
}

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

0696c9d4-6c7f-449b-9fce-545524e60631

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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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