rule win_stormwind_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.stormwind."
        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.stormwind"
        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 = { 85ff 753b 8b45f8 8d55dc }
            // n = 4, score = 100
            //   85ff                 | test                edi, edi
            //   753b                 | jne                 0x3d
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   8d55dc               | lea                 edx, [ebp - 0x24]

        $sequence_1 = { 59 5f 5e 8b8c2444020000 }
            // n = 4, score = 100
            //   59                   | pop                 ecx
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   8b8c2444020000       | mov                 ecx, dword ptr [esp + 0x244]

        $sequence_2 = { 7512 8bc3 bb90010000 99 }
            // n = 4, score = 100
            //   7512                 | jne                 0x14
            //   8bc3                 | mov                 eax, ebx
            //   bb90010000           | mov                 ebx, 0x190
            //   99                   | cdq                 

        $sequence_3 = { 84c0 752a 6a01 8d450c c7450c540c0410 50 }
            // n = 6, score = 100
            //   84c0                 | test                al, al
            //   752a                 | jne                 0x2c
            //   6a01                 | push                1
            //   8d450c               | lea                 eax, [ebp + 0xc]
            //   c7450c540c0410       | mov                 dword ptr [ebp + 0xc], 0x10040c54
            //   50                   | push                eax

        $sequence_4 = { 8bf2 8bf9 897dec c745fc00000000 68fe010000 c745f000000000 }
            // n = 6, score = 100
            //   8bf2                 | mov                 esi, edx
            //   8bf9                 | mov                 edi, ecx
            //   897dec               | mov                 dword ptr [ebp - 0x14], edi
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   68fe010000           | push                0x1fe
            //   c745f000000000       | mov                 dword ptr [ebp - 0x10], 0

        $sequence_5 = { e8???????? 8d4df0 83c404 3bc8 7408 8b30 }
            // n = 6, score = 100
            //   e8????????           |                     
            //   8d4df0               | lea                 ecx, [ebp - 0x10]
            //   83c404               | add                 esp, 4
            //   3bc8                 | cmp                 ecx, eax
            //   7408                 | je                  0xa
            //   8b30                 | mov                 esi, dword ptr [eax]

        $sequence_6 = { 56 e8???????? 83c404 8b4508 c645fc05 8b4dec 89830c020000 }
            // n = 7, score = 100
            //   56                   | push                esi
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   c645fc05             | mov                 byte ptr [ebp - 4], 5
            //   8b4dec               | mov                 ecx, dword ptr [ebp - 0x14]
            //   89830c020000         | mov                 dword ptr [ebx + 0x20c], eax

        $sequence_7 = { 33c0 eb42 6a0a e8???????? 59 895dfc 391cfd88e40410 }
            // n = 7, score = 100
            //   33c0                 | xor                 eax, eax
            //   eb42                 | jmp                 0x44
            //   6a0a                 | push                0xa
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   895dfc               | mov                 dword ptr [ebp - 4], ebx
            //   391cfd88e40410       | cmp                 dword ptr [edi*8 + 0x1004e488], ebx

        $sequence_8 = { 751b 8b450c 891f 8918 8bc7 8b4df4 }
            // n = 6, score = 100
            //   751b                 | jne                 0x1d
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   891f                 | mov                 dword ptr [edi], ebx
            //   8918                 | mov                 dword ptr [eax], ebx
            //   8bc7                 | mov                 eax, edi
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]

        $sequence_9 = { 6800020000 ff15???????? 8bf0 85f6 74c4 6a00 56 }
            // n = 7, score = 100
            //   6800020000           | push                0x200
            //   ff15????????         |                     
            //   8bf0                 | mov                 esi, eax
            //   85f6                 | test                esi, esi
            //   74c4                 | je                  0xffffffc6
            //   6a00                 | push                0
            //   56                   | push                esi

    condition:
        7 of them and filesize < 741376
}