win_icefog_auto

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

Detects win.icefog.

rule win_icefog_auto {

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

    


    strings:
        $sequence_0 = { 8b4508 8910 8b4920 83c004 894df0 894508 3bce }
                                                                                                
        $sequence_1 = { 894730 750a 837d9c00 7504 33c0 eb05 b801000000 }
                                                                                                
        $sequence_2 = { eb02 33c0 8a4dfc 884607 8a45ec 884e15 c78680000000ffffff3f }
                                                                                                
        $sequence_3 = { 8b450c 33d2 83f905 0f94c2 52 53 50 }
                                                                                                
        $sequence_4 = { 8b4310 85c0 7408 8b4050 8945fc eb0a c745fc00ca9a3b }
                                                                                                
        $sequence_5 = { e8???????? 8b4d0c 8b5614 6af0 50 8b4510 51 }
                                                                                                
        $sequence_6 = { 8b45f8 8b5df4 85c0 0f85d4000000 8b7b14 8b5b0c 4b }
                                                                                                
        $sequence_7 = { 8945fc 3bca 0f8e48ffffff 8955ec 8d4900 8955f4 39570c }
                                                                                                
        $sequence_8 = { c3 50 e8???????? 83c404 8b450c 8b4804 8b10 }
                                                                                                
        $sequence_9 = { 8d5901 895dfc 8b5d18 03d8 03cb 8955f0 8b5608 }
                                                                                                
    condition:
        7 of them and filesize < 1187840
}

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

379770ce-66fd-4496-8c5e-1c81b3964c2e

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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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