win_penco_auto

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

Detects win.penco.

rule win_penco_auto {

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

    


    strings:
        $sequence_0 = { 81ff00000040 774e 83c740 6a04 6800300000 57 6a00 }
                                                                                                
        $sequence_1 = { 895054 89705c 8bce c1e910 0fb6d1 8b0c9500d03400 }
                                                                                    
        $sequence_2 = { 7cf3 3bc8 7405 45 3bee 7eda }
                                                                                    
        $sequence_3 = { 8b4510 8b8848030000 51 e8???????? 83c410 8985bcfdffff }
                                                                                    
        $sequence_4 = { 7e17 8b542414 8d3c2a 8d4900 8a140f 3a1419 7505 }
                                                                                                
        $sequence_5 = { 51 ffd7 53 6800000008 6a03 53 6a01 }
                                                                                                
        $sequence_6 = { 68ff010000 6a00 8d8dd9fdffff 51 e8???????? 83c40c c785b0fdffff00000000 }
                                                                                                
        $sequence_7 = { 83c404 3bdd 7518 8d043e 68???????? 50 e8???????? }
                                                                                                
        $sequence_8 = { ff15???????? 8985d0f0ffff e9???????? c785d0fdffff04000000 6a00 8d85d0fdffff 50 }
                                                                                                
        $sequence_9 = { 750f c7851c94ffff00000000 e9???????? c78554beffff00000000 eb0f 8b8554beffff 83c001 }
                                                                                                
    condition:
        7 of them and filesize < 319488
}

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

0a8fd3cf-4b7e-47cf-a81a-627bba22a4b2

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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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