rule win_ironwind_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.ironwind."
        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.ironwind"
        malpedia_rule_date = "20260422"
        malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
        malpedia_version = "20260504"
        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 = { b81b000000 e9???????? 488987a8020000 e9???????? 488b8fa8020000 e8???????? 488b87e0000000 }
            // n = 7, score = 100
            //   b81b000000           | inc                 ecx
            //   e9????????           |                     
            //   488987a8020000       | mov                 eax, 8
            //   e9????????           |                     
            //   488b8fa8020000       | dec                 ecx
            //   e8????????           |                     
            //   488b87e0000000       | mov                 edx, ebp

        $sequence_1 = { 488d0d66790100 e8???????? 488b442438 488905???????? 488d442438 4883c008 488905???????? }
            // n = 7, score = 100
            //   488d0d66790100       | dec                 esp
            //   e8????????           |                     
            //   488b442438           | mov                 ebp, ecx
            //   488905????????       |                     
            //   488d442438           | je                  0xb30
            //   4883c008             | inc                 ebp
            //   488905????????       |                     

        $sequence_2 = { 48896c2420 57 4154 4157 4883ec30 4d63f8 4d8be1 }
            // n = 7, score = 100
            //   48896c2420           | dec                 eax
            //   57                   | lea                 ebp, [0x69bf9]
            //   4154                 | dec                 eax
            //   4157                 | mov                 eax, ebp
            //   4883ec30             | dec                 esp
            //   4d63f8               | lea                 edi, [0xffffecef]
            //   4d8be1               | movzx               ecx, byte ptr [eax]

        $sequence_3 = { 4803f1 0f84a9010000 4c8bcf 488d1525330300 4d8bc4 488bcd e8???????? }
            // n = 7, score = 100
            //   4803f1               | dec                 esp
            //   0f84a9010000         | mov                 ecx, dword ptr [esi + 0x1188]
            //   4c8bcf               | dec                 esp
            //   488d1525330300       | mov                 eax, ebx
            //   4d8bc4               | je                  0x72b
            //   488bcd               | inc                 ebp
            //   e8????????           |                     

        $sequence_4 = { 896c2420 4c8d05928c0300 498bd6 488bcb e8???????? ff15???????? 3930 }
            // n = 7, score = 100
            //   896c2420             | cmp                 ecx, eax
            //   4c8d05928c0300       | je                  0x14ef
            //   498bd6               | dec                 eax
            //   488bcb               | cmp                 ecx, edx
            //   e8????????           |                     
            //   ff15????????         |                     
            //   3930                 | je                  0x14fe

        $sequence_5 = { e8???????? 83f801 0f8596000000 448d482d 4c8d442430 488d542420 8d4816 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   83f801               | and                 al, 1
            //   0f8596000000         | mov                 byte ptr [edi + 0x5d3], al
            //   448d482d             | mov                 eax, ecx
            //   4c8d442430           | shr                 eax, 2
            //   488d542420           | mov                 byte ptr [edi + 0x5d3], al
            //   8d4816               | mov                 eax, ecx

        $sequence_6 = { 488b87e0000000 4885c0 7409 4839b0b8000000 750c 488d8fc00a0000 e8???????? }
            // n = 7, score = 100
            //   488b87e0000000       | dec                 eax
            //   4885c0               | cmp                 dword ptr [ebx + 0x98], -1
            //   7409                 | jne                 0xa17
            //   4839b0b8000000       | inc                 ebp
            //   750c                 | test                al, al
            //   488d8fc00a0000       | je                  0x932
            //   e8????????           |                     

        $sequence_7 = { 8903 e9???????? 4c8b08 4d85c9 0f8448030000 81c6ffffefff }
            // n = 6, score = 100
            //   8903                 | lea                 esi, [edi + 0x48]
            //   e9????????           |                     
            //   4c8b08               | dec                 eax
            //   4d85c9               | mov                 eax, ebp
            //   0f8448030000         | dec                 eax
            //   81c6ffffefff         | inc                 eax

        $sequence_8 = { 4533ed 4c39afc00a0000 0f8436010000 498b16 488d0d42890400 e8???????? }
            // n = 6, score = 100
            //   4533ed               | dec                 esp
            //   4c39afc00a0000       | mov                 eax, edi
            //   0f8436010000         | inc                 esp
            //   498b16               | mov                 dword ptr [esp + 0x20], esi
            //   488d0d42890400       | xor                 edx, edx
            //   e8????????           |                     

        $sequence_9 = { 41b849000000 440f45c0 0fbe8280060000 413bc0 741e 488b81a0010000 41b113 }
            // n = 7, score = 100
            //   41b849000000         | lea                 edx, [0x363f5]
            //   440f45c0             | dec                 eax
            //   0fbe8280060000       | mov                 ecx, edi
            //   413bc0               | mov                 eax, 0x1c
            //   741e                 | jmp                 0x81d
            //   488b81a0010000       | jmp                 0x835
            //   41b113               | dec                 eax

    condition:
        7 of them and filesize < 995328
}