win_pirpi_auto

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

Detects win.pirpi.

rule win_pirpi_auto {

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

    


    strings:
        $sequence_0 = { 51 57 8bcd e8???????? 3933 750c }
                                                                                    
        $sequence_1 = { 50 56 55 53 ff15???????? 53 ff15???????? }
                                                                                                
        $sequence_2 = { c20c00 33d2 f7f1 8d04d2 8d93c8480000 8d04c0 8d8cc370340000 }
                                                                                                
        $sequence_3 = { 49 51 68???????? 8d4c2460 ff15???????? 8a542413 }
                                                                                    
        $sequence_4 = { 8b45fa 83c604 25ffff0000 56 50 8bcb e8???????? }
                                                                                                
        $sequence_5 = { 5d b801000000 5b 81c49c020000 c20c00 8b442410 }
                                                                                    
        $sequence_6 = { 8b7c2418 85ff 0f8422010000 83f802 0f8587000000 8b8b20200000 8b8324200000 }
                                                                                                
        $sequence_7 = { ff15???????? 57 ff15???????? 3975fc 7415 53 }
                                                                                    
        $sequence_8 = { 3bf5 72eb 5f 88442a02 5e 5d 8bc2 }
                                                                                                
        $sequence_9 = { c3 8b942440010000 83c9ff 8bfa 33c0 }
                                                                        
    condition:
        7 of them and filesize < 327680
}

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

aac25694-9bcc-4302-95cf-ac042db8b39a

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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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