win_ramsay_auto

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

Detects win.ramsay.

rule win_ramsay_auto {

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

    


    strings:
        $sequence_0 = { 83f820 7502 eb07 33c0 }
                                                            
        $sequence_1 = { ff15???????? 85c0 7502 eb02 ebb1 }
                                                                        
        $sequence_2 = { 7514 ff15???????? 83f820 7502 }
                                                            
        $sequence_3 = { 837df808 731e 8b45f8 3b450c }
                                                            
        $sequence_4 = { 8b55fc 52 e8???????? 83c404 33c0 eb0d 8b45f8 }
                                                                                                
        $sequence_5 = { 8bec 83ec08 c745f800000000 6a00 6880000000 6a02 6a00 }
                                                                                                
        $sequence_6 = { 8b5508 8b4508 8a481e 884a08 }
                                                            
        $sequence_7 = { 8b95c4fdffff 52 ff15???????? 33c0 }
                                                            
        $sequence_8 = { 8b55fc 52 e8???????? 8945ec 837dec00 7561 8b45fc }
                                                                                                
        $sequence_9 = { 8b4508 8a480b 884a1e 8b5508 8b4508 8a481c 884a0b }
                                                                                                
        $sequence_10 = { 8b8dc4fdffff 51 e8???????? 85c0 7511 8b95c4fdffff 52 }
                                                                                                
        $sequence_11 = { ff15???????? 33c0 e9???????? e8???????? 85c0 }
                                                                        
        $sequence_12 = { 488d8c24e0090000 ff15???????? 85c0 7505 e9???????? 488b8c2408050000 }
                                                                                    
        $sequence_13 = { 488d8c24e8000000 ff15???????? 488d8c24e8000000 ff15???????? }
                                                            
        $sequence_14 = { 488d8c24e0090000 ff15???????? 488d8c24e0090000 ff15???????? 85c0 7519 33d2 }
                                                                                                
        $sequence_15 = { 488d8c24e0170000 ff15???????? 33c0 6689842420180000 }
                                                            
    condition:
        7 of them and filesize < 2031616
}

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

189aaed2-e857-4d69-af61-b006f82d0d50

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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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