rule win_unidentified_045_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.unidentified_045."
        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_045"
        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 = { 8d85f8feffff 50 68???????? 56 ff15???????? 5f }
            // n = 6, score = 100
            //   8d85f8feffff         | lea                 eax, [ebp - 0x108]
            //   50                   | push                eax
            //   68????????           |                     
            //   56                   | push                esi
            //   ff15????????         |                     
            //   5f                   | pop                 edi

        $sequence_1 = { 83feff 744a 6a04 6800300000 56 }
            // n = 5, score = 100
            //   83feff               | cmp                 esi, -1
            //   744a                 | je                  0x4c
            //   6a04                 | push                4
            //   6800300000           | push                0x3000
            //   56                   | push                esi

        $sequence_2 = { ff15???????? 50 ff15???????? a3???????? 3bc3 744e }
            // n = 6, score = 100
            //   ff15????????         |                     
            //   50                   | push                eax
            //   ff15????????         |                     
            //   a3????????           |                     
            //   3bc3                 | cmp                 eax, ebx
            //   744e                 | je                  0x50

        $sequence_3 = { 51 6a28 50 8945f8 ff15???????? }
            // n = 5, score = 100
            //   51                   | push                ecx
            //   6a28                 | push                0x28
            //   50                   | push                eax
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   ff15????????         |                     

        $sequence_4 = { 8901 8b8534ffffff 8b0d???????? 8901 8b8538ffffff 8b0d???????? 8901 }
            // n = 7, score = 100
            //   8901                 | mov                 dword ptr [ecx], eax
            //   8b8534ffffff         | mov                 eax, dword ptr [ebp - 0xcc]
            //   8b0d????????         |                     
            //   8901                 | mov                 dword ptr [ecx], eax
            //   8b8538ffffff         | mov                 eax, dword ptr [ebp - 0xc8]
            //   8b0d????????         |                     
            //   8901                 | mov                 dword ptr [ecx], eax

        $sequence_5 = { 72f7 885106 eb47 83fe04 }
            // n = 4, score = 100
            //   72f7                 | jb                  0xfffffff9
            //   885106               | mov                 byte ptr [ecx + 6], dl
            //   eb47                 | jmp                 0x49
            //   83fe04               | cmp                 esi, 4

        $sequence_6 = { 833d????????01 7520 389c2458020000 7417 8d44243c }
            // n = 5, score = 100
            //   833d????????01       |                     
            //   7520                 | jne                 0x22
            //   389c2458020000       | cmp                 byte ptr [esp + 0x258], bl
            //   7417                 | je                  0x19
            //   8d44243c             | lea                 eax, [esp + 0x3c]

        $sequence_7 = { ff15???????? 83bd34ffffff06 0f830b010000 8d45dc 50 68???????? 6a00 }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   83bd34ffffff06       | cmp                 dword ptr [ebp - 0xcc], 6
            //   0f830b010000         | jae                 0x111
            //   8d45dc               | lea                 eax, [ebp - 0x24]
            //   50                   | push                eax
            //   68????????           |                     
            //   6a00                 | push                0

    condition:
        7 of them and filesize < 73728
}