win_astarion_rat_auto

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

Detects win.astarion_rat.

rule win_astarion_rat_auto {

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

    


    strings:
        $sequence_0 = { 488d542430 0fb605???????? 4533c9 4533c0 f20f11442430 }
                                                                        
        $sequence_1 = { 48894610 e8???????? 488b5e10 eb07 488bf3 488b5b10 4885db }
                                                                                                
        $sequence_2 = { 48898424a0040000 8b09 48c744243000000000 e8???????? 8bd8 e8???????? }
                                                                                    
        $sequence_3 = { 742f 4885c0 7521 4c8d0d2f120100 33c9 4c8d0522120100 488d1523120100 }
                                                                                                
        $sequence_4 = { 85c0 0f8497000000 e8???????? 85c0 757a 8b4c2460 ba01000000 }
                                                                                                
        $sequence_5 = { eb09 b005 eb05 0fb6442435 8074243410 3410 }
                                                                                    
        $sequence_6 = { c605????????01 b001 4883c428 c3 4883ec28 e8???????? 488d15bca00100 }
                                                                                                
        $sequence_7 = { 4889742440 33f6 4c89742438 4c897c2430 0f1f4000 6666660f1f840000000000 8b0d???????? }
                                                                                                
        $sequence_8 = { 4157 488dac2480f8ffff 4881ec80080000 488b05???????? 4833c4 48898570070000 4c89442468 }
                                                                                                
        $sequence_9 = { 0f298520010000 0f2805???????? 0f298d00010000 0f280d???????? 88851a010000 0fb705???????? }
                                                                                    
    condition:
        7 of them and filesize < 462848
}

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

e4acd84d-65b6-444c-a1cf-7c3f08b2c3c7

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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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