win_buhtrap_auto

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

Detects win.buhtrap.

rule win_buhtrap_auto {

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

    


    strings:
        $sequence_0 = { e8???????? 59 59 84c0 0f8435010000 }
                                                                        
        $sequence_1 = { 890d???????? 66837ddc09 a2???????? 0f9405???????? e8???????? 83ec0c a2???????? }
                                                                                                
        $sequence_2 = { 897df4 ff15???????? 59 8bf0 }
                                                            
        $sequence_3 = { ffb4bc48010000 8d442448 50 ff15???????? 85c0 7417 47 }
                                                                                                
        $sequence_4 = { 8945c4 e8???????? 6a0b 5a b9???????? 8945f0 e8???????? }
                                                                                                
        $sequence_5 = { 8bfc 8bc8 a5 a5 a5 e8???????? 83c40c }
                                                                                                
        $sequence_6 = { 57 ffd6 6a0e 5a }
                                                            
        $sequence_7 = { ffd3 59 59 5f 5e }
                                                                        
        $sequence_8 = { e8???????? 837e3004 c745fc00f74084 7507 c745fc00f7c084 f6450c01 }
                                                                                    
        $sequence_9 = { 8d3441 66833e00 7529 85c0 750c }
                                                                        
        $sequence_10 = { ff7624 ff15???????? 8bd8 85db 0f84c4000000 6a68 }
                                                                                    
        $sequence_11 = { 83c414 56 68d69abbe7 6a05 68???????? 8945b8 }
                                                                                    
        $sequence_12 = { ff74245c 894610 ffd5 894614 8b4710 }
                                                                        
        $sequence_13 = { ff7610 57 e8???????? 8b7614 }
                                                            
        $sequence_14 = { eb60 8365e400 8365fc00 85db }
                                                            
    condition:
        7 of them and filesize < 131072
}

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

d254cc01-e681-429b-95f2-7ca522fdf582

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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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