win_nemim_auto

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

Detects win.nemim.

rule win_nemim_auto {

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

    


    strings:
        $sequence_0 = { a1???????? 83c410 85c0 7409 50 }
                                                                        
        $sequence_1 = { 8bd7 03c1 33d1 33d0 03d5 8db41681f67187 8b6c243c }
                                                                                                
        $sequence_2 = { 8d45cc 50 c745f0c8814200 e8???????? }
                                                            
        $sequence_3 = { 56 57 55 8b0c8504744300 }
                                                            
        $sequence_4 = { b935000000 8dbc247a010000 f3ab 668b0d???????? 8854245a 66ab }
                                                                                    
        $sequence_5 = { c7464c148b4200 c74650f88a4200 c706???????? 8bc6 }
                                                            
        $sequence_6 = { 895dec c745e8548b4200 8b4508 895dfc 3bc3 }
                                                                        
        $sequence_7 = { 83e01f c1f905 8d04c0 be00800000 8b0c8d40604300 8d548104 8a4c8104 }
                                                                                                
        $sequence_8 = { 8a8699010000 8a8e98010000 33d2 50 8a9697010000 51 33c0 }
                                                                                                
        $sequence_9 = { 75f0 8a01 84c0 740b 8806 }
                                                                        
    condition:
        7 of them and filesize < 499712
}

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

6c3c430a-13df-4cae-867f-8afd1dd8d2c6

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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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