rule win_triback_loader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.triback_loader."
        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.triback_loader"
        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 = { 7416 83f902 0f85c0010000 498bce e8???????? e9???????? 498bce }
            // n = 7, score = 100
            //   7416                 | dec                 eax
            //   83f902               | sub                 esp, 0x30
            //   0f85c0010000         | mov                 eax, dword ptr [esp + 0x60]
            //   498bce               | dec                 eax
            //   e8????????           |                     
            //   e9????????           |                     
            //   498bce               | mov                 ebx, edx

        $sequence_1 = { 8985e0040000 428d0407 41ffc0 8b1482 8bc3 480fafd6 4803d0 }
            // n = 7, score = 100
            //   8985e0040000         | mov                 cl, byte ptr [ecx + esi + 0x8dd90]
            //   428d0407             | dec                 eax
            //   41ffc0               | sub                 edx, eax
            //   8b1482               | mov                 eax, dword ptr [edx - 4]
            //   8bc3                 | dec                 eax
            //   480fafd6             | add                 edx, ecx
            //   4803d0               | movzx               ecx, byte ptr [edx]

        $sequence_2 = { 486385ec020000 488d0dfe50ffff 8b8481a8b40000 4803c1 ffe0 8b85ec020000 2d03400000 }
            // n = 7, score = 100
            //   486385ec020000       | mov                 dword ptr [ebp + 0x3c8], ecx
            //   488d0dfe50ffff       | dec                 esp
            //   8b8481a8b40000       | lea                 ecx, [0x21844]
            //   4803c1               | subsd               xmm1, xmm2
            //   ffe0                 | inc                 ecx
            //   8b85ec020000         | mulps               xmm1, xmmword ptr [ecx + eax*8]
            //   2d03400000           | movapd              xmm2, xmm1

        $sequence_3 = { 488d1dad050500 483bcb 740c e8???????? 48891d???????? b001 4883c420 }
            // n = 7, score = 100
            //   488d1dad050500       | je                  0x1361
            //   483bcb               | dec                 eax
            //   740c                 | lea                 eax, [0x78c3b]
            //   e8????????           |                     
            //   48891d????????       |                     
            //   b001                 | dec                 eax
            //   4883c420             | mov                 dword ptr [edx], eax

        $sequence_4 = { 740c 0fb703 4883c302 6685c0 75df 488d442440 88942433020000 }
            // n = 7, score = 100
            //   740c                 | cmp                 byte ptr [eax], 0x40
            //   0fb703               | je                  0xf3d
            //   4883c302             | mov                 dword ptr [ebp - 0x31], 5
            //   6685c0               | dec                 eax
            //   75df                 | lea                 eax, [0x6ddea]
            //   488d442440           | cmp                 al, 2
            //   88942433020000       | jne                 0xe55

        $sequence_5 = { 4885d2 0f8578ffffff 4883feff 7519 6645894c7bfe 8d4250 488b5c2430 }
            // n = 7, score = 100
            //   4885d2               | mov                 eax, 0xffffffff
            //   0f8578ffffff         | dec                 eax
            //   4883feff             | cmp                 dword ptr [ebp + 0x28], eax
            //   7519                 | je                  0x195d
            //   6645894c7bfe         | dec                 eax
            //   8d4250               | lea                 ebp, [ebx + 0x20]
            //   488b5c2430           | dec                 eax

        $sequence_6 = { eb04 44896320 488b4310 8a08 48ffc0 48894310 884b39 }
            // n = 7, score = 100
            //   eb04                 | dec                 eax
            //   44896320             | mov                 eax, dword ptr [esp + 0x98]
            //   488b4310             | dec                 eax
            //   8a08                 | mov                 dword ptr [esp + 0xa0], eax
            //   48ffc0               | dec                 esp
            //   48894310             | mov                 eax, dword ptr [esp + 0xc8]
            //   884b39               | dec                 eax

        $sequence_7 = { b8cdcccccc 41f7e0 c1ea03 8d0492 03c0 442bc0 0f84d0000000 }
            // n = 7, score = 100
            //   b8cdcccccc           | lea                 ecx, [0x29581]
            //   41f7e0               | xor                 ecx, ecx
            //   c1ea03               | dec                 esp
            //   8d0492               | lea                 eax, [0x29574]
            //   03c0                 | dec                 eax
            //   442bc0               | sub                 esp, 0x28
            //   0f84d0000000         | dec                 eax

        $sequence_8 = { 898584000000 488d0df6490800 e8???????? 488b8d68020000 488b09 48898df8090000 488bd0 }
            // n = 7, score = 100
            //   898584000000         | dec                 esp
            //   488d0df6490800       | mov                 eax, edx
            //   e8????????           |                     
            //   488b8d68020000       | mov                 dword ptr [ecx], edx
            //   488b09               | dec                 ecx
            //   48898df8090000       | shr                 eax, 0x20
            //   488bd0               | inc                 ebp

        $sequence_9 = { 4533c9 4489ada0040000 4c8d85a4040000 45892e bacc010000 e8???????? 32c0 }
            // n = 7, score = 100
            //   4533c9               | jmp                 0x13ce
            //   4489ada0040000       | dec                 eax
            //   4c8d85a4040000       | add                 ecx, 0x460
            //   45892e               | dec                 ebp
            //   bacc010000           | add                 esi, esi
            //   e8????????           |                     
            //   32c0                 | dec                 ebx

    condition:
        7 of them and filesize < 1483776
}