rule win_transbox_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        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 = "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 = { 57 e8???????? 8bbde0faffff 8d8dd4faffff 33db 53 51 }
            // n = 7, score = 100
            //   57                   | push                edi
            //   e8????????           |                     
            //   8bbde0faffff         | mov                 edi, dword ptr [ebp - 0x520]
            //   8d8dd4faffff         | lea                 ecx, [ebp - 0x52c]
            //   33db                 | xor                 ebx, ebx
            //   53                   | push                ebx
            //   51                   | push                ecx

        $sequence_1 = { 895dec e8???????? 59 59 895dfc 8b7e10 c745ec01000000 }
            // n = 7, score = 100
            //   895dec               | mov                 dword ptr [ebp - 0x14], ebx
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   895dfc               | mov                 dword ptr [ebp - 4], ebx
            //   8b7e10               | mov                 edi, dword ptr [esi + 0x10]
            //   c745ec01000000       | mov                 dword ptr [ebp - 0x14], 1

        $sequence_2 = { 56 e8???????? 59 56 e8???????? 8b85c0fdffff 83c008 }
            // n = 7, score = 100
            //   56                   | push                esi
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   56                   | push                esi
            //   e8????????           |                     
            //   8b85c0fdffff         | mov                 eax, dword ptr [ebp - 0x240]
            //   83c008               | add                 eax, 8

        $sequence_3 = { 0f850dfdffff 83bde4fdffff08 8d85d0fdffff 899de0fdffff 0f4385d0fdffff 33c9 668908 }
            // n = 7, score = 100
            //   0f850dfdffff         | jne                 0xfffffd13
            //   83bde4fdffff08       | cmp                 dword ptr [ebp - 0x21c], 8
            //   8d85d0fdffff         | lea                 eax, [ebp - 0x230]
            //   899de0fdffff         | mov                 dword ptr [ebp - 0x220], ebx
            //   0f4385d0fdffff       | cmovae              eax, dword ptr [ebp - 0x230]
            //   33c9                 | xor                 ecx, ecx
            //   668908               | mov                 word ptr [eax], cx

        $sequence_4 = { 0f84f8020000 e9???????? 56 8d8db8fdffff e8???????? 68???????? c645fc19 }
            // n = 7, score = 100
            //   0f84f8020000         | je                  0x2fe
            //   e9????????           |                     
            //   56                   | push                esi
            //   8d8db8fdffff         | lea                 ecx, [ebp - 0x248]
            //   e8????????           |                     
            //   68????????           |                     
            //   c645fc19             | mov                 byte ptr [ebp - 4], 0x19

        $sequence_5 = { 51 8d45fc 8955fc 50 51 8bcb e8???????? }
            // n = 7, score = 100
            //   51                   | push                ecx
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   8955fc               | mov                 dword ptr [ebp - 4], edx
            //   50                   | push                eax
            //   51                   | push                ecx
            //   8bcb                 | mov                 ecx, ebx
            //   e8????????           |                     

        $sequence_6 = { 85c0 7407 50 ff15???????? 6a00 6a00 ffb5b0fdffff }
            // n = 7, score = 100
            //   85c0                 | test                eax, eax
            //   7407                 | je                  9
            //   50                   | push                eax
            //   ff15????????         |                     
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   ffb5b0fdffff         | push                dword ptr [ebp - 0x250]

        $sequence_7 = { 8bfb 8974241c 50 897c241c e8???????? 83c40c 8d842488000000 }
            // n = 7, score = 100
            //   8bfb                 | mov                 edi, ebx
            //   8974241c             | mov                 dword ptr [esp + 0x1c], esi
            //   50                   | push                eax
            //   897c241c             | mov                 dword ptr [esp + 0x1c], edi
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   8d842488000000       | lea                 eax, [esp + 0x88]

        $sequence_8 = { 8d4dfa ff7508 8975cc e8???????? 83c404 8d4dfa }
            // n = 6, score = 100
            //   8d4dfa               | lea                 ecx, [ebp - 6]
            //   ff7508               | push                dword ptr [ebp + 8]
            //   8975cc               | mov                 dword ptr [ebp - 0x34], esi
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   8d4dfa               | lea                 ecx, [ebp - 6]

        $sequence_9 = { c785f8fbffffc8000000 ff15???????? 8d85f4fbffff c785f4fbffff00040000 50 }
            // n = 5, score = 100
            //   c785f8fbffffc8000000     | mov    dword ptr [ebp - 0x408], 0xc8
            //   ff15????????         |                     
            //   8d85f4fbffff         | lea                 eax, [ebp - 0x40c]
            //   c785f4fbffff00040000     | mov    dword ptr [ebp - 0x40c], 0x400
            //   50                   | push                eax

    condition:
        7 of them and filesize < 288768
}