win_lowball_auto

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

Detects win.lowball.

rule win_lowball_auto {

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

    


    strings:
        $sequence_0 = { 8b2d???????? 83c9ff bf???????? 33c0 8d542418 f2ae }
                                                                                    
        $sequence_1 = { 4f c1e902 f3a5 8bcb 8d84242c040000 83e103 }
                                                                                    
        $sequence_2 = { 88442420 b97f000000 33c0 8d7c2421 }
                                                            
        $sequence_3 = { f3a5 8bcb 8d84244c0d0000 83e103 50 }
                                                                        
        $sequence_4 = { 8bcb 8d84242c040000 83e103 50 f3a4 ff15???????? }
                                                                                    
        $sequence_5 = { c74424100a000000 8bc1 8bf7 8bfa 8d942434070000 }
                                                                        
        $sequence_6 = { e8???????? 83c410 85c0 0f8452010000 a1???????? }
                                                                        
        $sequence_7 = { 8bcb 4f c1e902 f3a5 8bcb 8d94243c090000 83e103 }
                                                                                                
        $sequence_8 = { 6800058084 6a00 6a00 68???????? 52 68???????? 57 }
                                                                                                
        $sequence_9 = { 83d8ff 85c0 740e 55 }
                                                            
    condition:
        7 of them and filesize < 40960
}

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

e74ecb0d-420e-4cbb-858b-6f6ad75c2dd1

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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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