win_webmonitor_auto

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

Detects win.webmonitor.

rule win_webmonitor_auto {

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

    


    strings:
        $sequence_0 = { 0fb6c0 6a0e 33f0 e8???????? ff75dc 0fb6c0 }
                                                                                    
        $sequence_1 = { 9e 6c 68ff080800 8a3401 a3???????? 0800 8a30 }
                                                                                                
        $sequence_2 = { 33c0 894df0 894f10 c7471407000000 668907 894dfc }
                                                                                    
        $sequence_3 = { 33c9 83c410 2bc1 7414 }
                                                            
        $sequence_4 = { 1b6100 43 ec fe04ec }
                                                            
        $sequence_5 = { d94200 a4 44 43 00dc 7442 000477 }
                                                                                                
        $sequence_6 = { a1???????? 41 0094be4100d891 41 }
                                                            
        $sequence_7 = { 0338 8bc6 99 83c004 8901 }
                                                                        
        $sequence_8 = { 50 895de8 c745ec0f000000 885dd8 }
                                                            
        $sequence_9 = { 2bf0 8bc1 99 83e203 03c2 c1f802 2bf8 }
                                                                                                
        $sequence_10 = { 00e8 894100 dc2442 00e8 17 42 0048a5 }
                                                                                                
        $sequence_11 = { 04e4 fd 0468 ff05???????? 000d???????? }
                                                                        
        $sequence_12 = { 0f434520 50 ff75c8 ff15???????? }
                                                            
        $sequence_13 = { ff01 04e8 fd 0512002413 000d???????? 04e4 fd }
                                                                                                
        $sequence_14 = { 03c6 50 8d0433 50 e8???????? 83c418 ebb0 }
                                                                                                
        $sequence_15 = { 0094be4100d891 41 0084e84100a872 42 00a06a4200f8 }
                                                                        
    condition:
        7 of them and filesize < 1984512
}

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

aac29b3a-6cd2-4b95-9cb5-15cb722d641f

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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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