win_zitmo_auto

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

Detects win.zitmo.

rule win_zitmo_auto {

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

    


    strings:
        $sequence_0 = { 23cb 8bd6 ff75a0 e8???????? }
                                                            
        $sequence_1 = { 55 8bec 81c434ffffff f7df 8bf0 49 }
                                                                                    
        $sequence_2 = { 8175b437340000 23f9 f7d1 03d7 f7d2 }
                                                                        
        $sequence_3 = { 4b f7de c745bc36343335 03c3 f7da f7d1 }
                                                                                    
        $sequence_4 = { ffb584feffff 56 e8???????? ffb574ffffff }
                                                            
        $sequence_5 = { f7df 894da8 8955d0 ffb560feffff e8???????? c9 }
                                                                                    
        $sequence_6 = { f7d7 ff45b4 8bcf f7d6 03fa 8d9568ffffff }
                                                                                    
        $sequence_7 = { 81759437320000 3145b8 41 23c6 }
                                                            
        $sequence_8 = { 42 4e f7df 03d7 48 40 }
                                                                                    
        $sequence_9 = { 23cb 4a f7d0 8955c4 c9 c20c00 55 }
                                                                                                
    condition:
        7 of them and filesize < 843776
}

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

63a36626-8c28-4161-a781-846652d63c48

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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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