win_fishmaster_auto

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

Detects win.fishmaster.

rule win_fishmaster_auto {

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

    


    strings:
        $sequence_0 = { 4c8bcb 49c7c0ffffffff 48c744242000000000 488bd7 488b08 4883c901 ff15???????? }
                                                                                                
        $sequence_1 = { 448b7f10 48897310 48c743180f000000 408833 4533c0 488d15d5300000 }
                                                                                    
        $sequence_2 = { 8bbc2498000000 4180f82f 410f44fa c1ff04 c0e202 }
                                                                        
        $sequence_3 = { ff15???????? 4533f6 4489742420 4533c9 4533c0 418d5601 }
                                                                                    
        $sequence_4 = { 48837f1810 7203 488b07 488d4c2438 4983fe10 }
                                                                        
        $sequence_5 = { eb26 ff15???????? cc 488bd6 e8???????? }
                                                                        
        $sequence_6 = { 488d0d922c0000 e8???????? 85c0 742e 32c0 eb33 }
                                                                                    
        $sequence_7 = { 4883ec18 4c8bc1 b84d5a0000 6639051dcbffff }
                                                            
        $sequence_8 = { 42880409 488d542440 48837c245810 480f43542440 488d4c2440 }
                                                                        
        $sequence_9 = { 8d71b9 eb1c 8d41d0 3c09 }
                                                            
    condition:
        7 of them and filesize < 812032
}

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

c37d1ef2-8c75-4b40-8122-ecde06de0e8f

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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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