rule win_unidentified_045_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        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 = "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 = { 8901 e8???????? a3???????? 6a02 53 8b4598 }
            // n = 6, score = 100
            //   8901                 | mov                 dword ptr [ecx], eax
            //   e8????????           |                     
            //   a3????????           |                     
            //   6a02                 | push                2
            //   53                   | push                ebx
            //   8b4598               | mov                 eax, dword ptr [ebp - 0x68]

        $sequence_1 = { 8d4dfc 51 6a28 50 8945f8 }
            // n = 5, score = 100
            //   8d4dfc               | lea                 ecx, [ebp - 4]
            //   51                   | push                ecx
            //   6a28                 | push                0x28
            //   50                   | push                eax
            //   8945f8               | mov                 dword ptr [ebp - 8], eax

        $sequence_2 = { eb3a 81f911111111 7507 a3???????? eb2b }
            // n = 5, score = 100
            //   eb3a                 | jmp                 0x3c
            //   81f911111111         | cmp                 ecx, 0x11111111
            //   7507                 | jne                 9
            //   a3????????           |                     
            //   eb2b                 | jmp                 0x2d

        $sequence_3 = { 80f901 730a 51 8b4df8 d345fc 59 eb08 }
            // n = 7, score = 100
            //   80f901               | cmp                 cl, 1
            //   730a                 | jae                 0xc
            //   51                   | push                ecx
            //   8b4df8               | mov                 ecx, dword ptr [ebp - 8]
            //   d345fc               | rol                 dword ptr [ebp - 4], cl
            //   59                   | pop                 ecx
            //   eb08                 | jmp                 0xa

        $sequence_4 = { 53 53 ffd7 8b4d70 ff4570 }
            // n = 5, score = 100
            //   53                   | push                ebx
            //   53                   | push                ebx
            //   ffd7                 | call                edi
            //   8b4d70               | mov                 ecx, dword ptr [ebp + 0x70]
            //   ff4570               | inc                 dword ptr [ebp + 0x70]

        $sequence_5 = { 7434 40 8944240c bf???????? 381d???????? 7422 }
            // n = 6, score = 100
            //   7434                 | je                  0x36
            //   40                   | inc                 eax
            //   8944240c             | mov                 dword ptr [esp + 0xc], eax
            //   bf????????           |                     
            //   381d????????         |                     
            //   7422                 | je                  0x24

        $sequence_6 = { 3c41 742c 3c42 7428 56 ff15???????? }
            // n = 6, score = 100
            //   3c41                 | cmp                 al, 0x41
            //   742c                 | je                  0x2e
            //   3c42                 | cmp                 al, 0x42
            //   7428                 | je                  0x2a
            //   56                   | push                esi
            //   ff15????????         |                     

        $sequence_7 = { 8945ac 0fb74606 6bc028 8dbc30f8000000 8d4f28 8b45dc }
            // n = 6, score = 100
            //   8945ac               | mov                 dword ptr [ebp - 0x54], eax
            //   0fb74606             | movzx               eax, word ptr [esi + 6]
            //   6bc028               | imul                eax, eax, 0x28
            //   8dbc30f8000000       | lea                 edi, [eax + esi + 0xf8]
            //   8d4f28               | lea                 ecx, [edi + 0x28]
            //   8b45dc               | mov                 eax, dword ptr [ebp - 0x24]

    condition:
        7 of them and filesize < 73728
}