win_icexloader_auto

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

Detects win.icexloader.

rule win_icexloader_auto {

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

    


    strings:
        $sequence_0 = { 8b8550ffffff 29d0 8945b0 8b85ecfeffff 8b55b0 89542404 890424 }
                                                                                                
        $sequence_1 = { dec9 dd04c540574200 0f896afcffff def9 e9???????? 83bde0fdffff00 784e }
                                                                                                
        $sequence_2 = { ba08000000 01f8 8945d0 8d45d8 e8???????? b9???????? e8???????? }
                                                                                                
        $sequence_3 = { 8955c0 e8???????? 8b55c0 89c3 e8???????? ba???????? }
                                                                                    
        $sequence_4 = { 85ff 7407 8b07 8945d8 eb07 c745d800000000 c745e000000000 }
                                                                                                
        $sequence_5 = { 83bd30ffffff00 7407 ba10000000 eb05 ba20000000 8b8510ffffff 09d0 }
                                                                                                
        $sequence_6 = { 891c24 eb0c 8d45e0 891c24 89f2 89442404 8d4dd8 }
                                                                                                
        $sequence_7 = { 8d8518fdffff c78504fdfffffdffffff e8???????? ba20000000 8d8538fdffff e8???????? 83bdf4fcffff00 }
                                                                                                
        $sequence_8 = { 8d8520f0ffff e8???????? 84db 7560 8b85e4e6ffff ba05000000 e8???????? }
                                                                                                
        $sequence_9 = { 5f 5d c20400 55 d9ee 89e5 }
                                                                                    
    condition:
        7 of them and filesize < 656384
}

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

d741d4d2-7591-458d-9a76-d0e83a175a9b

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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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