win_zeus_openssl_auto

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

Detects win.zeus_openssl.

rule win_zeus_openssl_auto {

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

    


    strings:
        $sequence_0 = { 8975f8 c745ec00000000 81fb3d020000 0f8d9f010000 8d815c0b0000 ba3d020000 2bd3 }
                                                                                                
        $sequence_1 = { 814a1800900000 5e a810 7444 a840 741f }
                                                                                    
        $sequence_2 = { f6c510 7405 80cd08 eb03 80e5f7 886dff }
                                                                                    
        $sequence_3 = { 66d3ef 83c0f5 6689beb8160000 eb11 8b4508 48 66d3e0 }
                                                                                                
        $sequence_4 = { 33c9 83e20f 7614 0fb6440e18 0306 3985e8fdffff 7449 }
                                                                                                
        $sequence_5 = { f6c510 7405 80cd08 eb03 80e5f7 886dff 0fb6f9 }
                                                                                                
        $sequence_6 = { 837e6800 0f8443010000 8b4e6c 8b4638 33ff 8a5401ff 8b8ea0160000 }
                                                                                                
        $sequence_7 = { 814a1800300000 8a6207 84e4 7543 8ac1 }
                                                                        
        $sequence_8 = { 8986bc160000 83f90c 7e52 8b7d0c 8b5614 83c7fc 668bc7 }
                                                                                                
        $sequence_9 = { 83e20f 7614 0fb6440e18 0306 }
                                                            
    condition:
        7 of them and filesize < 4546560
}

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

2248d701-1a60-4d2e-9d3b-e6e12ee536f1

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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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