win_httpdropper_auto

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

Detects win.httpdropper.

rule win_httpdropper_auto {

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

    


    strings:
        $sequence_0 = { 014b18 c7437c00000000 897b70 85c0 0f85b4010000 }
                                                                        
        $sequence_1 = { 018614400000 8b8614400000 c68430142000000d ff8614400000 }
                                                            
        $sequence_2 = { 018610200000 8d5e10 8d9b00000000 8b9610200000 }
                                                            
        $sequence_3 = { 8985a4f0ffff 8985a8f0ffff 8985acf0ffff 8985b0f0ffff 8985b4f0ffff e8???????? }
                                                                                    
        $sequence_4 = { 014614 bb40000000 2bd9 3bfb 7254 }
                                                                        
        $sequence_5 = { 017df8 83f93d 7471 83f920 7505 b92b000000 0fbf0c4d20a80310 }
                                                                                                
        $sequence_6 = { 0110 80aa0110a4aa01 1023 d18a0688078a 46 }
                                                                        
        $sequence_7 = { 015dfc 83c204 81fa???????? 7cb7 3d00010000 740a c786a4af060078420310 }
                                                                                                
        $sequence_8 = { 03c9 2bd9 81ff94010000 7519 }
                                                            
        $sequence_9 = { 018b70af0100 8b9370af0100 488d0d8e6f0100 e8???????? }
                                                            
        $sequence_10 = { 03742478 488d442478 4533c9 4533c0 }
                                                            
        $sequence_11 = { 03cb 69c960ea0000 ff15???????? e9???????? }
                                                            
        $sequence_12 = { 039c2488000000 488d842488000000 c744243080000000 4533c9 }
                                                            
        $sequence_13 = { 014e28 48c786a800000000000000 899698000000 85c0 }
                                                            
        $sequence_14 = { 018b18400000 8b8318400000 488d8b20400000 c68418182000000d }
                                                            
        $sequence_15 = { 03c8 85db 740e 3bd9 }
                                                            
    condition:
        7 of them and filesize < 524288
}

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

24353901-8847-4f3e-9797-720c1af20fbc

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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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