rule win_unidentified_001_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.unidentified_001."
        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_001"
        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 = { 85c9 7483 8d45fc 50 }
            // n = 4, score = 100
            //   85c9                 | test                ecx, ecx
            //   7483                 | je                  0xffffff85
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   50                   | push                eax

        $sequence_1 = { ff5108 8b45f8 3bc3 0f8435fdffff 8b08 }
            // n = 5, score = 100
            //   ff5108               | call                dword ptr [ecx + 8]
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   3bc3                 | cmp                 eax, ebx
            //   0f8435fdffff         | je                  0xfffffd3b
            //   8b08                 | mov                 ecx, dword ptr [eax]

        $sequence_2 = { 0f87c8000000 0f844bfbffff b952555300 3bc1 7767 74d3 2d434d5200 }
            // n = 7, score = 100
            //   0f87c8000000         | ja                  0xce
            //   0f844bfbffff         | je                  0xfffffb51
            //   b952555300           | mov                 ecx, 0x535552
            //   3bc1                 | cmp                 eax, ecx
            //   7767                 | ja                  0x69
            //   74d3                 | je                  0xffffffd5
            //   2d434d5200           | sub                 eax, 0x524d43

        $sequence_3 = { 2d49525100 0f84acfbffff 2d04020000 0f8400fcffff 2d00ed0000 0f8496fbffff }
            // n = 6, score = 100
            //   2d49525100           | sub                 eax, 0x515249
            //   0f84acfbffff         | je                  0xfffffbb2
            //   2d04020000           | sub                 eax, 0x204
            //   0f8400fcffff         | je                  0xfffffc06
            //   2d00ed0000           | sub                 eax, 0xed00
            //   0f8496fbffff         | je                  0xfffffb9c

        $sequence_4 = { 0f8462fdffff 8d45f0 50 e8???????? 8b00 85c0 7404 }
            // n = 7, score = 100
            //   0f8462fdffff         | je                  0xfffffd68
            //   8d45f0               | lea                 eax, [ebp - 0x10]
            //   50                   | push                eax
            //   e8????????           |                     
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   85c0                 | test                eax, eax
            //   7404                 | je                  6

        $sequence_5 = { 59 5e c3 55 8bec 837d0800 56 }
            // n = 7, score = 100
            //   59                   | pop                 ecx
            //   5e                   | pop                 esi
            //   c3                   | ret                 
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   837d0800             | cmp                 dword ptr [ebp + 8], 0
            //   56                   | push                esi

        $sequence_6 = { 50 ff75ec 56 ff5720 }
            // n = 4, score = 100
            //   50                   | push                eax
            //   ff75ec               | push                dword ptr [ebp - 0x14]
            //   56                   | push                esi
            //   ff5720               | call                dword ptr [edi + 0x20]

        $sequence_7 = { 85c9 74e7 e8???????? 33c9 }
            // n = 4, score = 100
            //   85c9                 | test                ecx, ecx
            //   74e7                 | je                  0xffffffe9
            //   e8????????           |                     
            //   33c9                 | xor                 ecx, ecx

        $sequence_8 = { 8b4d0c 894dec 668b4d08 66894de8 }
            // n = 4, score = 100
            //   8b4d0c               | mov                 ecx, dword ptr [ebp + 0xc]
            //   894dec               | mov                 dword ptr [ebp - 0x14], ecx
            //   668b4d08             | mov                 cx, word ptr [ebp + 8]
            //   66894de8             | mov                 word ptr [ebp - 0x18], cx

        $sequence_9 = { 6a04 68???????? 6a07 6800080000 }
            // n = 4, score = 100
            //   6a04                 | push                4
            //   68????????           |                     
            //   6a07                 | push                7
            //   6800080000           | push                0x800

    condition:
        7 of them and filesize < 65536
}