win_ismagent_auto

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

Detects win.ismagent.

rule win_ismagent_auto {

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

    


    strings:
        $sequence_0 = { 89742450 e8???????? 83c410 85c0 }
                                                            
        $sequence_1 = { 7719 ff2485246f4000 6a04 58 }
                                                            
        $sequence_2 = { 8b049d48404200 8b4de0 f644082801 7515 e8???????? c70009000000 }
                                                                                    
        $sequence_3 = { 8bc7 83e03f 6bc830 8b049548404200 8b440818 83f8ff }
                                                                                    
        $sequence_4 = { 68???????? ff74242c e8???????? 68???????? 68???????? }
                                                                        
        $sequence_5 = { 0f84ad030000 83f826 7603 6a26 58 0fb60c85b6c44100 }
                                                                                    
        $sequence_6 = { 8974241c 7511 807a0220 750b }
                                                            
        $sequence_7 = { 884108 8d8424f0000000 50 8d842404070000 50 ff15???????? }
                                                                                    
    condition:
        7 of them and filesize < 327680
}

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

75f782bb-974e-49fa-b25d-e72350ec5c9e

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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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