rule win_ice_event_auto {

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

    /* DISCLAIMER
     * The strings used in this rule have been automatically selected from the
     * disassembly of memory dumps and unpacked files, using YARA-Signator.
     * The code and documentation is published here:
     * https://github.com/fxb-cocacoding/yara-signator
     * As Malpedia is used as data source, please note that for a given
     * number of families, only single samples are documented.
     * This likely impacts the degree of generalization these rules will offer.
     * Take the described generation method also into consideration when you
     * apply the rules in your use cases and assign them confidence levels.
     */


    strings:
        $sequence_0 = { 486bc000 488d0d1adc0100 8b542430 48891401 }
            // n = 4, score = 100
            //   486bc000             | mov                 eax, eax
            //   488d0d1adc0100       | dec                 eax
            //   8b542430             | lea                 edx, [0x1b383]
            //   48891401             | dec                 eax

        $sequence_1 = { 48894a08 488d4808 e8???????? 488d0511250100 488903 }
            // n = 5, score = 100
            //   48894a08             | dec                 eax
            //   488d4808             | mov                 eax, dword ptr [ebx]
            //   e8????????           |                     
            //   488d0511250100       | mov                 byte ptr [eax], 0
            //   488903               | jmp                 0x551

        $sequence_2 = { 0f82df000000 48c1e82c 660feb15???????? 660feb0d???????? 4c8d0dc4af0000 f20f5cca f2410f590cc1 }
            // n = 7, score = 100
            //   0f82df000000         | dec                 eax
            //   48c1e82c             | inc                 eax
            //   660feb15????????     |                     
            //   660feb0d????????     |                     
            //   4c8d0dc4af0000       | dec                 eax
            //   f20f5cca             | mov                 ecx, dword ptr [ebp]
            //   f2410f590cc1         | mov                 byte ptr [ebp - 0x20], 0

        $sequence_3 = { 7479 488d0dd2260100 483bc1 746d 488b83e0000000 4885c0 }
            // n = 6, score = 100
            //   7479                 | dec                 ecx
            //   488d0dd2260100       | or                  ecx, 0xffffffff
            //   483bc1               | dec                 eax
            //   746d                 | lea                 edx, [ebp - 0x58]
            //   488b83e0000000       | dec                 eax
            //   4885c0               | lea                 ecx, [esp + 0x30]

        $sequence_4 = { 4c8bc3 488bd0 488d4d80 e8???????? 488bc8 e8???????? 90 }
            // n = 7, score = 100
            //   4c8bc3               | lea                 ecx, [esp + 0x58]
            //   488bd0               | dec                 eax
            //   488d4d80             | mov                 ecx, eax
            //   e8????????           |                     
            //   488bc8               | dec                 esp
            //   e8????????           |                     
            //   90                   | lea                 eax, [ebp - 0x38]

        $sequence_5 = { 57 4883ec20 418bf0 4c8d0d77c30000 }
            // n = 4, score = 100
            //   57                   | xor                 ecx, ecx
            //   4883ec20             | test                eax, eax
            //   418bf0               | dec                 eax
            //   4c8d0d77c30000       | lea                 ecx, [0x12471]

        $sequence_6 = { 498be8 4c8bea 4b8b8cfee0400200 4c8b15???????? 4883cfff }
            // n = 5, score = 100
            //   498be8               | lea                 eax, [ebp - 0x58]
            //   4c8bea               | dec                 eax
            //   4b8b8cfee0400200     | cmp                 ecx, 0x10
            //   4c8b15????????       |                     
            //   4883cfff             | dec                 ecx

        $sequence_7 = { 7205 488b0b eb03 488bcb 4a8d1441 482bf5 4c8d3436 }
            // n = 7, score = 100
            //   7205                 | dec                 eax
            //   488b0b               | cmp                 eax, ebx
            //   eb03                 | je                  0x87e
            //   488bcb               | dec                 eax
            //   4a8d1441             | lea                 edx, [esp + 0x30]
            //   482bf5               | dec                 eax
            //   4c8d3436             | lea                 ecx, [eax + 0x10]

        $sequence_8 = { 44896c2444 418d45ff 0fb68c8282e30100 0fb6b48283e30100 }
            // n = 4, score = 100
            //   44896c2444           | jae                 0xd8
            //   418d45ff             | inc                 eax
            //   0fb68c8282e30100     | mov                 byte ptr [esi], bh
            //   0fb6b48283e30100     | inc                 ebp

        $sequence_9 = { e8???????? cc 4883f927 0f866f030000 e8???????? cc }
            // n = 6, score = 100
            //   e8????????           |                     
            //   cc                   | lea                 eax, [esi + 3]
            //   4883f927             | dec                 eax
            //   0f866f030000         | lea                 ecx, [0x1cc4b]
            //   e8????????           |                     
            //   cc                   | dec                 eax

    condition:
        7 of them and filesize < 331776
}