win_fanny_auto

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

Detects win.fanny.

rule win_fanny_auto {

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

    


    strings:
        $sequence_0 = { 0f84f0000000 b941000000 33c0 8bfe 6a5c f3ab 55 }
                                                                                                
        $sequence_1 = { 8d45f8 50 8d45bc 6a00 50 }
                                                                        
        $sequence_2 = { 56 e8???????? 3dfe000000 59 }
                                                            
        $sequence_3 = { 3bd9 7311 2bc3 83c011 }
                                                            
        $sequence_4 = { 5b 59 c20c00 56 8b742410 68???????? }
                                                                                    
        $sequence_5 = { 50 56 e8???????? 59 8bd8 59 eb2c }
                                                                                                
        $sequence_6 = { 3bcf 7409 03c1 40 3bc6 }
                                                                        
        $sequence_7 = { 8b7d0c 8bf7 8b4508 3bc3 0f84b8020000 }
                                                                        
        $sequence_8 = { ff75f8 e8???????? 59 59 84db 758b e9???????? }
                                                                                                
        $sequence_9 = { 53 ff15???????? be00000200 56 ff15???????? 3bc3 59 }
                                                                                                
        $sequence_10 = { 33c0 8d7da8 f3ab c745a808000000 e8???????? 8bf0 83feff }
                                                                                                
        $sequence_11 = { c745bc00000000 8d4dec e8???????? 8d4dd8 e8???????? 8b45bc e9???????? }
                                                                                                
        $sequence_12 = { 3b4dd0 7d26 6a00 8b55fc 52 }
                                                                        
        $sequence_13 = { 8bec 83ec08 c745fc00000000 6a01 8b4508 }
                                                                        
        $sequence_14 = { b905000000 8dbd90fbffff 8db5d0fbffff 33d2 66f3a7 751d c745fcffffffff }
                                                                                                
        $sequence_15 = { 5e 5d 5b 750c ff742404 e8???????? }
                                                                                    
    condition:
        7 of them and filesize < 368640
}

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

c0f6baae-2685-4046-8d78-8032251ea5e1

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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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