win_lookback_auto

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

Detects win.lookback.

rule win_lookback_auto {

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

    


    strings:
        $sequence_0 = { 8b7c241c 33ed 8b473c 8b443878 03c7 8b5024 }
                                                                                    
        $sequence_1 = { 393d???????? 75af eb24 8b0d???????? }
                                                            
        $sequence_2 = { 8b542430 894308 8b442428 83c414 }
                                                            
        $sequence_3 = { 8b31 25ff0f0000 03c6 8bf7 }
                                                            
        $sequence_4 = { 8b7af8 83c228 03f8 8bc1 c1e902 f3a5 }
                                                                                    
        $sequence_5 = { 668b4b06 3be9 7cd0 5f 5e }
                                                                        
        $sequence_6 = { 7422 6a00 8d4c2404 6a20 51 6a03 }
                                                                                    
        $sequence_7 = { ff15???????? 8d542400 52 e8???????? 33c0 81c408010000 }
                                                                                    
        $sequence_8 = { 5b 81c410070000 c3 55 8bec 51 53 }
                                                                                                
        $sequence_9 = { 3bef 741b 6800800000 57 }
                                                            
    condition:
        7 of them and filesize < 131072
}

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

48955f50-1d9c-4e07-974e-53978fd52319

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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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