win_frozenhill_auto

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

Detects win.frozenhill.

rule win_frozenhill_auto {

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

    


    strings:
        $sequence_0 = { 8b0485507c1310 8a4c102d 80e1fe 8b55e0 c1fa06 8b45e0 83e03f }
                                                                                                
        $sequence_1 = { 6a72 58 668985a6fdffff 6a61 58 668985a8fdffff 6a6d }
                                                                                                
        $sequence_2 = { ff15???????? 3bf4 e8???????? 8945e0 837decff 7507 c745ec80000000 }
                                                                                                
        $sequence_3 = { 81c1???????? 51 8b5510 8b02 0345c4 50 }
                                                                                    
        $sequence_4 = { 50 8b4df4 51 e8???????? 85c0 7583 8bf4 }
                                                                                                
        $sequence_5 = { b872000000 668945a4 b865000000 668945a6 b85c000000 668945a8 b84d000000 }
                                                                                                
        $sequence_6 = { 8d8520ffffff 50 8b4df8 e8???????? 8b08 898d2cffffff 8b5508 }
                                                                                                
        $sequence_7 = { c645fc00 8d8df4feffff e8???????? 0fb6850bffffff 85c0 744b }
                                                                                    
        $sequence_8 = { b8cccccccc f3ab b9???????? e8???????? 8b4508 8945f8 8b450c }
                                                                                                
        $sequence_9 = { b001 eb2e 8d85c4feffff 50 ffb5b8feffff e8???????? 8945f4 }
                                                                                                
    condition:
        7 of them and filesize < 2652160
}

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

db225c61-af48-4aa9-bc94-9e22cd9a9afe

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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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