win_fobber_auto

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

Detects win.fobber.

rule win_fobber_auto {

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

    


    strings:
        $sequence_0 = { 89e5 57 51 8b7d08 }
                                                            
        $sequence_1 = { 760e 8d0431 39f8 7607 49 01cf 01ce }
                                                                                                
        $sequence_2 = { 31c0 50 50 ff750c ff7508 }
                                                                        
        $sequence_3 = { 55 89e5 51 8b4510 8b5508 8b4d0c }
                                                                                    
        $sequence_4 = { 8b7d08 57 e8???????? 85c0 740f 89c1 }
                                                                                    
        $sequence_5 = { 8b7d08 8b750c 8b4d10 39f7 760e }
                                                                        
        $sequence_6 = { ff750c 6800300000 ff7508 6a00 }
                                                            
        $sequence_7 = { 660fc146f9 6685c0 7515 0fb646f8 50 0fb746f6 }
                                                                                    
        $sequence_8 = { a4 06 4f 96 }
                                                            
        $sequence_9 = { 81e8ca080000 81e8e1970000 81e83e6e0100 e9???????? 81c6b8690000 }
                                                                        
        $sequence_10 = { 3a918d84a72f bf9cd7e94d 09d9 2817 3f }
                                                                        
        $sequence_11 = { 48 5e fa df9c6182a5b1b2 e8???????? }
                                                                        
        $sequence_12 = { 0f85c44c0100 8b4510 8945f0 663918 7419 83c002 }
                                                                                    
        $sequence_13 = { 96 f0f266a2???????? 857f47 94 6960cf0267b974 }
                                                                        
        $sequence_14 = { 81eccd210000 81c4455a0000 81c42c090000 81c4ab1e0000 81ec6f790000 81ec956ffeff 81c45a1b0000 }
                                                                                                
        $sequence_15 = { 59 663908 0f842b150100 ff07 }
                                                            
    condition:
        7 of them and filesize < 188416
}

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

12e05d67-d463-49ae-8706-1ba29015b668

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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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