win_mars_stealer_auto

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

Detects win.mars_stealer.

rule win_mars_stealer_auto {

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

    


    strings:
        $sequence_0 = { 50 ff15???????? 8b0d???????? 51 8d95f8f9ffff 52 ff15???????? }
                                                                                                
        $sequence_1 = { 50 ff15???????? 034518 038558e6ffff 50 e8???????? }
                                                                                    
        $sequence_2 = { 8d4df4 51 ff15???????? 5f 5e 8be5 }
                                                                                    
        $sequence_3 = { 52 6a00 6a00 ff15???????? 8d85e8feffff 50 ff15???????? }
                                                                                                
        $sequence_4 = { 8d9598faffff 52 8d85a8fcffff 50 ff15???????? 8b4d1c }
                                                                                    
        $sequence_5 = { eb24 8b8d78deffff c6840d80deffff00 8d9580deffff }
                                                            
        $sequence_6 = { 8b55f0 8b02 8945f4 8b4df4 51 ff15???????? }
                                                                                    
        $sequence_7 = { 52 8d85a0fbffff 50 e8???????? 83c418 8b4d1c }
                                                                                    
        $sequence_8 = { 52 e8???????? 83c410 8d85b0fdffff 50 8b8df4feffff 51 }
                                                                                                
        $sequence_9 = { 8bec b8c81f0000 e8???????? c745f0a01f0000 c745ec00000000 c78544e0ffff9e304100 }
                                                                                    
    condition:
        7 of them and filesize < 219136
}

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

ddd63d99-9047-4279-beb5-08d05297dfeb

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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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