rule win_transbox_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.transbox."
        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.transbox"
        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 = { 6683f95a 7609 8d419f 6683f819 7771 53 }
            // n = 6, score = 100
            //   6683f95a             | cmp                 cx, 0x5a
            //   7609                 | jbe                 0xb
            //   8d419f               | lea                 eax, [ecx - 0x61]
            //   6683f819             | cmp                 ax, 0x19
            //   7771                 | ja                  0x73
            //   53                   | push                ebx

        $sequence_1 = { 50 6a01 e8???????? ffb5ccd3ffff 68???????? ff15???????? 59 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   6a01                 | push                1
            //   e8????????           |                     
            //   ffb5ccd3ffff         | push                dword ptr [ebp - 0x2c34]
            //   68????????           |                     
            //   ff15????????         |                     
            //   59                   | pop                 ecx

        $sequence_2 = { c20800 68???????? e8???????? cc b8???????? c3 55 }
            // n = 7, score = 100
            //   c20800               | ret                 8
            //   68????????           |                     
            //   e8????????           |                     
            //   cc                   | int3                
            //   b8????????           |                     
            //   c3                   | ret                 
            //   55                   | push                ebp

        $sequence_3 = { 57 56 ff7508 e8???????? e9???????? 53 ff7508 }
            // n = 7, score = 100
            //   57                   | push                edi
            //   56                   | push                esi
            //   ff7508               | push                dword ptr [ebp + 8]
            //   e8????????           |                     
            //   e9????????           |                     
            //   53                   | push                ebx
            //   ff7508               | push                dword ptr [ebp + 8]

        $sequence_4 = { 740c c74318acbb0110 befdffffff 8b4b28 57 51 }
            // n = 6, score = 100
            //   740c                 | je                  0xe
            //   c74318acbb0110       | mov                 dword ptr [ebx + 0x18], 0x1001bbac
            //   befdffffff           | mov                 esi, 0xfffffffd
            //   8b4b28               | mov                 ecx, dword ptr [ebx + 0x28]
            //   57                   | push                edi
            //   51                   | push                ecx

        $sequence_5 = { 8d45d4 53 0f4345d4 8945d0 e8???????? 8bf8 397de4 }
            // n = 7, score = 100
            //   8d45d4               | lea                 eax, [ebp - 0x2c]
            //   53                   | push                ebx
            //   0f4345d4             | cmovae              eax, dword ptr [ebp - 0x2c]
            //   8945d0               | mov                 dword ptr [ebp - 0x30], eax
            //   e8????????           |                     
            //   8bf8                 | mov                 edi, eax
            //   397de4               | cmp                 dword ptr [ebp - 0x1c], edi

        $sequence_6 = { 59 6a69 58 6a36 }
            // n = 4, score = 100
            //   59                   | pop                 ecx
            //   6a69                 | push                0x69
            //   58                   | pop                 eax
            //   6a36                 | push                0x36

        $sequence_7 = { 50 50 8d85b8fbffff 68???????? 50 e8???????? }
            // n = 6, score = 100
            //   50                   | push                eax
            //   50                   | push                eax
            //   8d85b8fbffff         | lea                 eax, [ebp - 0x448]
            //   68????????           |                     
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_8 = { 66898338070000 e8???????? 898334070000 8d45f8 50 8d8308020000 }
            // n = 6, score = 100
            //   66898338070000       | mov                 word ptr [ebx + 0x738], ax
            //   e8????????           |                     
            //   898334070000         | mov                 dword ptr [ebx + 0x734], eax
            //   8d45f8               | lea                 eax, [ebp - 8]
            //   50                   | push                eax
            //   8d8308020000         | lea                 eax, [ebx + 0x208]

        $sequence_9 = { 50 51 ff15???????? 8bd8 83c40c 85db 7434 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   8bd8                 | mov                 ebx, eax
            //   83c40c               | add                 esp, 0xc
            //   85db                 | test                ebx, ebx
            //   7434                 | je                  0x36

    condition:
        7 of them and filesize < 288768
}