win_asprox_auto

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

Detects win.asprox.

rule win_asprox_auto {

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

    


    strings:
        $sequence_0 = { 0bd0 8b450c 0345fc 8810 e9???????? 8a45fb }
                                                                                    
        $sequence_1 = { 75ee 8b55ec 2b55e8 8955e0 }
                                                            
        $sequence_2 = { 8d4584 50 8b8d08ffffff 51 }
                                                            
        $sequence_3 = { 83c404 83c001 50 8b45f8 50 8b4de8 51 }
                                                                                                
        $sequence_4 = { c7460c03000000 3b4df8 0f8324040000 8d8644040000 50 51 e8???????? }
                                                                                                
        $sequence_5 = { 3975f4 7e2a 8b934c0c0000 0fb60cb2 8d8c8b44040000 8b39 8d14ba }
                                                                                                
        $sequence_6 = { a1???????? 8985e0fdffff 668b0d???????? 66898de4fdffff 8a15???????? 8895e6fdffff c68553feffff01 }
                                                                                                
        $sequence_7 = { 6a00 8b4d08 51 8b55f8 52 ff15???????? 8945f4 }
                                                                                                
        $sequence_8 = { 8b4334 85c0 0f884ff0ffff 3b45f4 0f8d46f0ffff 8365fc00 }
                                                                                    
        $sequence_9 = { 83e937 8b550c 0355fc 880a eb0f 0fbe45fa 83e857 }
                                                                                                
    condition:
        7 of them and filesize < 155648
}

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

68c0c6e0-7172-4426-af6c-1dff31655c27

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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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