win_webc2_yahoo_auto

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

Detects win.webc2_yahoo.

rule win_webc2_yahoo_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.webc2_yahoo."
        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.webc2_yahoo"
        malpedia_rule_date = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    


    strings:
        $sequence_0 = { 53 e8???????? 83c424 8d85fcfeffff 56 50 68???????? }
                                                                                                
        $sequence_1 = { eb06 8b4518 802000 5f 5e }
                                                                        
        $sequence_2 = { f3ab 66ab aa 8d85f0fdffff 50 53 ff15???????? }
                                                                                                
        $sequence_3 = { ffb69c841e00 ff15???????? 85c0 53 74b6 }
                                                                        
        $sequence_4 = { c745f800040000 53 e8???????? 8b7d08 57 e8???????? 8bf0 }
                                                                                                
        $sequence_5 = { 6a64 5b 53 e8???????? }
                                                            
        $sequence_6 = { 888614e75e00 48 46 83f861 7df3 c686????????40 }
                                                                                    
        $sequence_7 = { 7403 56 ffd7 6a01 58 5f }
                                                                                    
        $sequence_8 = { 46 33c9 53 c686????????23 c686????????7c }
                                                                        
        $sequence_9 = { 8945e4 e8???????? 59 53 ff75e4 }
                                                                        
    condition:
        7 of them and filesize < 8060928
}

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

9ca3831a-b9d0-44d9-a120-aa3d7fba2628

Propose edits, view related rules, and engage with the community through comments.

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 ]]

Community Discussion