rule win_firechili_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.firechili."
        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.firechili"
        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 = { 400fb6ff 488d4c2420 84c0 410f45ff }
            // n = 4, score = 100
            //   400fb6ff             | mov                 esi, dword ptr [esp + 0x40]
            //   488d4c2420           | xor                 al, al
            //   84c0                 | dec                 eax
            //   410f45ff             | mov                 esi, dword ptr [esp + 0x48]

        $sequence_1 = { c3 e8???????? 833d????????00 74e2 4c8bc3 e8???????? 488905???????? }
            // n = 7, score = 100
            //   c3                   | lea                 eax, [edi + edi]
            //   e8????????           |                     
            //   833d????????00       |                     
            //   74e2                 | dec                 ebp
            //   4c8bc3               | mov                 eax, edx
            //   e8????????           |                     
            //   488905????????       |                     

        $sequence_2 = { 33ff 41897b10 49897b18 33c0 498943c8 498943d0 }
            // n = 6, score = 100
            //   33ff                 | mov                 edi, dword ptr [esp + 0x38]
            //   41897b10             | dec                 eax
            //   49897b18             | mov                 ebx, dword ptr [esp + 0x28]
            //   33c0                 | dec                 eax
            //   498943c8             | test                ebx, ebx
            //   498943d0             | je                  0x161d

        $sequence_3 = { ff15???????? eb07 bb0f001cc0 eb2d 488b4c2430 8b442440 }
            // n = 6, score = 100
            //   ff15????????         |                     
            //   eb07                 | mov                 edx, dword ptr [edx + eax*4 + 4]
            //   bb0f001cc0           | dec                 esp
            //   eb2d                 | mov                 edx, edi
            //   488b4c2430           | inc                 ecx
            //   8b442440             | movzx               edx, ax

        $sequence_4 = { 4c8d05b4430000 89442434 498bc0 48894c2420 48894c242c 895c2438 }
            // n = 6, score = 100
            //   4c8d05b4430000       | je                  0x315
            //   89442434             | test                eax, eax
            //   498bc0               | js                  0x328
            //   48894c2420           | inc                 ebp
            //   48894c242c           | xor                 ecx, ecx
            //   895c2438             | dec                 eax

        $sequence_5 = { 488bcf ff15???????? eb10 488bd7 }
            // n = 4, score = 100
            //   488bcf               | dec                 eax
            //   ff15????????         |                     
            //   eb10                 | test                ebx, ebx
            //   488bd7               | je                  0xc74

        $sequence_6 = { 0f1f00 488d0440 488d34c500000000 420fb7442e10 428b542e14 0fb6c8 }
            // n = 6, score = 100
            //   0f1f00               | nop                 dword ptr [eax]
            //   488d0440             | dec                 eax
            //   488d34c500000000     | cmp                 eax, esi
            //   420fb7442e10         | dec                 eax
            //   428b542e14           | mov                 eax, dword ptr [esi]
            //   0fb6c8               | mov                 edi, ebp

        $sequence_7 = { 48894138 41807c241000 0f848d000000 4885c0 0f8484000000 4d8bc4 498bd7 }
            // n = 7, score = 100
            //   48894138             | dec                 eax
            //   41807c241000         | mov                 ecx, dword ptr [esp + 0x68]
            //   0f848d000000         | dec                 eax
            //   4885c0               | mov                 dword ptr [esp + 0x50], edx
            //   0f8484000000         | dec                 eax
            //   4d8bc4               | test                ecx, ecx
            //   498bd7               | je                  0x171e

        $sequence_8 = { 4839542420 7509 33c0 663b442428 745e ff15???????? }
            // n = 6, score = 100
            //   4839542420           | test                esi, esi
            //   7509                 | dec                 eax
            //   33c0                 | mov                 esi, dword ptr [esp + 0x48]
            //   663b442428           | dec                 eax
            //   745e                 | lea                 ecx, [0x206c]
            //   ff15????????         |                     

        $sequence_9 = { 488b4908 ff15???????? 8bd8 85c0 0f881b010000 4c8d8c24a8020000 41b848020000 }
            // n = 7, score = 100
            //   488b4908             | mov                 dword ptr [ecx + 0x20], eax
            //   ff15????????         |                     
            //   8bd8                 | dec                 eax
            //   85c0                 | mov                 ecx, dword ptr [esp + 0x30]
            //   0f881b010000         | dec                 eax
            //   4c8d8c24a8020000     | cmp                 dword ptr [ecx + 0x20], 0
            //   41b848020000         | jne                 0x6a6

    condition:
        7 of them and filesize < 91136
}