win_mimikatz_auto

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

Detects win.mimikatz.

rule win_mimikatz_auto {

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

    


    strings:
        $sequence_0 = { 83f8ff 750e ff15???????? c7002a000000 }
                                                            
        $sequence_1 = { f7f1 85d2 7406 2bca }
                                                            
        $sequence_2 = { 83f812 72f1 33c0 c3 }
                                                            
        $sequence_3 = { c3 81f998000000 7410 81f996000000 7408 81f99b000000 }
                                                                                    
        $sequence_4 = { f6c320 740f 83f809 7c05 }
                                                            
        $sequence_5 = { f6c320 7413 6683f809 7206 }
                                                            
        $sequence_6 = { 66894108 33c0 39410c 740b }
                                                            
        $sequence_7 = { 6683f83f 7607 32c0 e9???????? }
                                                            
        $sequence_8 = { e9???????? bd64000000 83ff2d 0f853c040000 c644245c01 }
                                                                        
        $sequence_9 = { ff15???????? be00000400 8bc8 8bd6 }
                                                            
        $sequence_10 = { ff5048 8bd8 85c0 7837 }
                                                            
        $sequence_11 = { 2bc1 85c9 7403 83c008 }
                                                            
        $sequence_12 = { 3c02 7207 e8???????? eb10 }
                                                            
        $sequence_13 = { ff15???????? bd6f000000 3bc3 7405 }
                                                            
        $sequence_14 = { 8d4d08 8d0437 51 50 e8???????? 83c40c }
                                                                                    
        $sequence_15 = { 33c9 3b04cd08d04600 7413 41 83f92d }
                                                                        
        $sequence_16 = { 40 8945f4 83fb04 7561 33db 90 }
                                                                                    
        $sequence_17 = { e8???????? 8bc8 8b4508 ba???????? 2aca }
                                                                        
        $sequence_18 = { 8d04453cdb4600 8bc8 2bce 6a03 d1f9 68???????? }
                                                                                    
        $sequence_19 = { 99 83ec0c 53 83e203 }
                                                            
        $sequence_20 = { c1e80d 8d4dd8 83e001 51 894614 c7461ce0164000 }
                                                                                    
        $sequence_21 = { 8b5dd0 ebab c745e424714000 817de428714000 7311 8b45e4 8b00 }
                                                                                                
    condition:
        7 of them and filesize < 1642496
}

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

038296d7-170e-41c7-b2e6-1c3c3b9cb319

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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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