rule win_unidentified_113_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.unidentified_113."
        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.unidentified_113"
        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 = { c7868c0d000000000000 ff15???????? 56 c786900d000000000000 c686a00d000000 c686d80d000000 c786d00d000000000000 }
            // n = 7, score = 100
            //   c7868c0d000000000000     | mov    dword ptr [esi + 0xd8c], 0
            //   ff15????????         |                     
            //   56                   | push                esi
            //   c786900d000000000000     | mov    dword ptr [esi + 0xd90], 0
            //   c686a00d000000       | mov                 byte ptr [esi + 0xda0], 0
            //   c686d80d000000       | mov                 byte ptr [esi + 0xdd8], 0
            //   c786d00d000000000000     | mov    dword ptr [esi + 0xdd0], 0

        $sequence_1 = { e8???????? c645fc04 8d7e30 8b4f18 f30f7e4710 50 8d8568ffffff }
            // n = 7, score = 100
            //   e8????????           |                     
            //   c645fc04             | mov                 byte ptr [ebp - 4], 4
            //   8d7e30               | lea                 edi, [esi + 0x30]
            //   8b4f18               | mov                 ecx, dword ptr [edi + 0x18]
            //   f30f7e4710           | movq                xmm0, qword ptr [edi + 0x10]
            //   50                   | push                eax
            //   8d8568ffffff         | lea                 eax, [ebp - 0x98]

        $sequence_2 = { ff742448 57 6a00 6a00 6a00 55 e8???????? }
            // n = 7, score = 100
            //   ff742448             | push                dword ptr [esp + 0x48]
            //   57                   | push                edi
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   55                   | push                ebp
            //   e8????????           |                     

        $sequence_3 = { c6870301000001 895d00 b301 e9???????? b9???????? 8d442414 6690 }
            // n = 7, score = 100
            //   c6870301000001       | mov                 byte ptr [edi + 0x103], 1
            //   895d00               | mov                 dword ptr [ebp], ebx
            //   b301                 | mov                 bl, 1
            //   e9????????           |                     
            //   b9????????           |                     
            //   8d442414             | lea                 eax, [esp + 0x14]
            //   6690                 | nop                 

        $sequence_4 = { bbd0070000 89570c 895f08 5b 88572a 5f c3 }
            // n = 7, score = 100
            //   bbd0070000           | mov                 ebx, 0x7d0
            //   89570c               | mov                 dword ptr [edi + 0xc], edx
            //   895f08               | mov                 dword ptr [edi + 8], ebx
            //   5b                   | pop                 ebx
            //   88572a               | mov                 byte ptr [edi + 0x2a], dl
            //   5f                   | pop                 edi
            //   c3                   | ret                 

        $sequence_5 = { e8???????? 83f8ff 0f84d0010000 e8???????? a1???????? 85c0 7477 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   83f8ff               | cmp                 eax, -1
            //   0f84d0010000         | je                  0x1d6
            //   e8????????           |                     
            //   a1????????           |                     
            //   85c0                 | test                eax, eax
            //   7477                 | je                  0x79

        $sequence_6 = { 8be8 83c414 85ed 0f8524010000 8b4628 53 8b5e1c }
            // n = 7, score = 100
            //   8be8                 | mov                 ebp, eax
            //   83c414               | add                 esp, 0x14
            //   85ed                 | test                ebp, ebp
            //   0f8524010000         | jne                 0x12a
            //   8b4628               | mov                 eax, dword ptr [esi + 0x28]
            //   53                   | push                ebx
            //   8b5e1c               | mov                 ebx, dword ptr [esi + 0x1c]

        $sequence_7 = { e9???????? 8b442410 80785601 770c ff742414 e8???????? 83c404 }
            // n = 7, score = 100
            //   e9????????           |                     
            //   8b442410             | mov                 eax, dword ptr [esp + 0x10]
            //   80785601             | cmp                 byte ptr [eax + 0x56], 1
            //   770c                 | ja                  0xe
            //   ff742414             | push                dword ptr [esp + 0x14]
            //   e8????????           |                     
            //   83c404               | add                 esp, 4

        $sequence_8 = { e9???????? 8d4608 50 ff750c e8???????? 84c0 741b }
            // n = 7, score = 100
            //   e9????????           |                     
            //   8d4608               | lea                 eax, [esi + 8]
            //   50                   | push                eax
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   e8????????           |                     
            //   84c0                 | test                al, al
            //   741b                 | je                  0x1d

        $sequence_9 = { e8???????? 6a00 6a50 ff37 8be8 e8???????? 8bf0 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   6a00                 | push                0
            //   6a50                 | push                0x50
            //   ff37                 | push                dword ptr [edi]
            //   8be8                 | mov                 ebp, eax
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax

    condition:
        7 of them and filesize < 4707328
}