win_daserf_auto

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

Detects win.daserf.

rule win_daserf_auto {

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

    


    strings:
        $sequence_0 = { f7d2 055764eba6 96 89b42430f4ffff 8bf0 8b842430f4ffff }
                                                                                    
        $sequence_1 = { 81ebec401d00 81ebf23e6175 2dfb558e1d 81c31c531c90 81eb5c20afa1 }
                                                                        
        $sequence_2 = { 2dfc5ddc60 81c3c57bcb30 81ebd5598ce2 2d81094125 058ded417b 2d2627935d }
                                                                                    
        $sequence_3 = { e8???????? 83c40c 68???????? 8d85dccfffff }
                                                            
        $sequence_4 = { 0593f8abb9 90 0536f1718f 9b }
                                                            
        $sequence_5 = { 81c342c7a5b6 2daf2e7dff 0584b23582 0521d74246 05f3411296 2d12cffc2a }
                                                                                    
        $sequence_6 = { 81eb63386ed4 81eb7db44fc1 05c66ea7b3 81eb5c98823e 056cb152b0 058d91c6f9 }
                                                                                    
        $sequence_7 = { ffd7 56 6a00 8945fc }
                                                            
        $sequence_8 = { 97 89bc2400f1ffff 8bf8 8b842400f1ffff }
                                                            
        $sequence_9 = { 50 8d868a030000 68???????? 50 e8???????? }
                                                                        
        $sequence_10 = { 92 89942410f1ffff 8bd0 8b842410f1ffff }
                                                            
        $sequence_11 = { 8b842420f4ffff 53 8bdb 53 }
                                                            
        $sequence_12 = { 8bc0 8b842400f3ffff 81ebee7d857e 7500 2d444a28fe }
                                                                        
        $sequence_13 = { ff75e0 8d1b ff75fc 90 }
                                                            
        $sequence_14 = { 81eb477bafc6 90 81eb1979d9a8 8bdb 05f1ad59f9 }
                                                                        
        $sequence_15 = { 81c327c3674b 2d8eee641d 81c390166ae8 05923e6fb3 05114b4947 }
                                                                        
    condition:
        7 of them and filesize < 245760
}

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

a1079c86-e5f1-4b8a-bc2f-e859fd303374

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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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