rule win_unidentified_105_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.unidentified_105."
        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_105"
        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 = { 68???????? e8???????? 83c404 6a44 8d8580efffff 6a00 50 }
            // n = 7, score = 200
            //   68????????           |                     
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   6a44                 | push                0x44
            //   8d8580efffff         | lea                 eax, [ebp - 0x1080]
            //   6a00                 | push                0
            //   50                   | push                eax

        $sequence_1 = { 8d542420 e8???????? 85c0 740d 6a64 ff15???????? }
            // n = 6, score = 200
            //   8d542420             | lea                 edx, [esp + 0x20]
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   740d                 | je                  0xf
            //   6a64                 | push                0x64
            //   ff15????????         |                     

        $sequence_2 = { 8d4603 50 57 e8???????? 8bc6 }
            // n = 5, score = 200
            //   8d4603               | lea                 eax, [esi + 3]
            //   50                   | push                eax
            //   57                   | push                edi
            //   e8????????           |                     
            //   8bc6                 | mov                 eax, esi

        $sequence_3 = { b91a000000 f7f9 80c261 8855ff }
            // n = 4, score = 200
            //   b91a000000           | mov                 ecx, 0x1a
            //   f7f9                 | idiv                ecx
            //   80c261               | add                 dl, 0x61
            //   8855ff               | mov                 byte ptr [ebp - 1], dl

        $sequence_4 = { 8b481c 51 8d542420 8bce e8???????? 85c0 0f859a000000 }
            // n = 7, score = 200
            //   8b481c               | mov                 ecx, dword ptr [eax + 0x1c]
            //   51                   | push                ecx
            //   8d542420             | lea                 edx, [esp + 0x20]
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   0f859a000000         | jne                 0xa0

        $sequence_5 = { 8a08 40 84c9 75f9 2bc2 6a02 8d4c30fe }
            // n = 7, score = 200
            //   8a08                 | mov                 cl, byte ptr [eax]
            //   40                   | inc                 eax
            //   84c9                 | test                cl, cl
            //   75f9                 | jne                 0xfffffffb
            //   2bc2                 | sub                 eax, edx
            //   6a02                 | push                2
            //   8d4c30fe             | lea                 ecx, [eax + esi - 2]

        $sequence_6 = { 894808 8b55f4 89500c 668b4df8 83c420 66894810 }
            // n = 6, score = 200
            //   894808               | mov                 dword ptr [eax + 8], ecx
            //   8b55f4               | mov                 edx, dword ptr [ebp - 0xc]
            //   89500c               | mov                 dword ptr [eax + 0xc], edx
            //   668b4df8             | mov                 cx, word ptr [ebp - 8]
            //   83c420               | add                 esp, 0x20
            //   66894810             | mov                 word ptr [eax + 0x10], cx

        $sequence_7 = { 50 6802020000 ff15???????? 33c0 6804010000 8d8c24a4010000 51 }
            // n = 7, score = 200
            //   50                   | push                eax
            //   6802020000           | push                0x202
            //   ff15????????         |                     
            //   33c0                 | xor                 eax, eax
            //   6804010000           | push                0x104
            //   8d8c24a4010000       | lea                 ecx, [esp + 0x1a4]
            //   51                   | push                ecx

        $sequence_8 = { 53 e8???????? 6a38 8d9598feffff 57 52 }
            // n = 6, score = 200
            //   53                   | push                ebx
            //   e8????????           |                     
            //   6a38                 | push                0x38
            //   8d9598feffff         | lea                 edx, [ebp - 0x168]
            //   57                   | push                edi
            //   52                   | push                edx

        $sequence_9 = { 56 57 ff15???????? 8b8df8feffff }
            // n = 4, score = 200
            //   56                   | push                esi
            //   57                   | push                edi
            //   ff15????????         |                     
            //   8b8df8feffff         | mov                 ecx, dword ptr [ebp - 0x108]

    condition:
        7 of them and filesize < 253952
}