win_masol_auto

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

Detects win.masol.

rule win_masol_auto {

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

    


    strings:
        $sequence_0 = { 4c8d4c2470 448b4608 488bcb ff15???????? 488bcb ff15???????? 418bfe }
                                                                                                
        $sequence_1 = { 48894c2450 4533e4 418bf4 4489642440 4883cfff 4c8bc7 66660f1f840000000000 }
                                                                                                
        $sequence_2 = { 488d8df1000000 4883c8ff 90 48ffc0 44382401 75f7 }
                                                                                    
        $sequence_3 = { c1e818 418bb496606a0200 4133b48e60660200 0fb6c8 410fb6c3 4133b48e606e0200 }
                                                                                    
        $sequence_4 = { 4889442420 488d0d9ea10200 e8???????? 8b7c2440 488d4304 488bb42480040000 }
                                                                                    
        $sequence_5 = { 0f2845b0 0f29442420 0f2845d0 0f29442440 0f2845f0 0f29442460 0f284510 }
                                                                                                
        $sequence_6 = { 4889542420 488d542440 4c03ce 488bcb e8???????? 458bc7 498bd6 }
                                                                                                
        $sequence_7 = { 4833c4 4889442448 33db 488bf9 48895c2430 4881c118160000 895c2428 }
                                                                                                
        $sequence_8 = { 4533c9 4533c0 ba00000040 488d8c2480000000 ff15???????? 488bd8 }
                                                                                    
        $sequence_9 = { 483bd0 7747 4869c281000000 483d00100000 7220 f6c11f }
                                                                                    
    condition:
        7 of them and filesize < 413696
}

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

f5ea61e4-3495-4fe7-88b5-6bc1a3d4055d

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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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