win_crypto_fortress_auto

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

Detects win.crypto_fortress.

rule win_crypto_fortress_auto {

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

    


    strings:
        $sequence_0 = { eb04 03f1 8bff 83c601 }
                                                            
        $sequence_1 = { 3400 aa 3412 aa }
                                                            
        $sequence_2 = { 75a9 a1???????? a3???????? a1???????? a3???????? 68???????? }
                                                                                    
        $sequence_3 = { 0bc0 7402 eb39 6a00 8d45ac 50 }
                                                                                    
        $sequence_4 = { 8bec 81c4a4feffff ff35???????? e8???????? 8985b4feffff ff35???????? e8???????? }
                                                                                                
        $sequence_5 = { 33c0 0442 aa 2ce1 aa 2ce7 aa }
                                                                                                
        $sequence_6 = { aa 3418 aa 3404 aa 2c53 aa }
                                                                                                
        $sequence_7 = { 2cf1 aa 04f9 aa 3447 aa }
                                                                                    
        $sequence_8 = { aa 3417 aa 3422 aa }
                                                                        
        $sequence_9 = { b832000000 8bc8 6a00 8d45f8 50 51 68???????? }
                                                                                                
    condition:
        7 of them and filesize < 188416
}

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

e3b516dd-938c-4a34-9ec1-61c7924e21d2

Propose edits, view related rules, and engage with the community through comments.

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 ]]

Community Discussion