rule win_proto8_rat_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.proto8_rat."
        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.proto8_rat"
        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 = { c747203f000000 488b4f28 488d2d97440400 483bcd 7442 4885c9 7405 }
            // n = 7, score = 100
            //   c747203f000000       | mov                 eax, 0xfffffffd
            //   488b4f28             | jmp                 0x7df
            //   488d2d97440400       | mov                 eax, 0xfffffffe
            //   483bcd               | jmp                 0x7df
            //   7442                 | or                  eax, 0xffffffff
            //   4885c9               | dec                 eax
            //   7405                 | add                 esp, 0x58

        $sequence_1 = { 897328 4885d2 741a 4863432c 85c0 7e0a 488bc8 }
            // n = 7, score = 100
            //   897328               | dec                 eax
            //   4885d2               | add                 esp, 0x48
            //   741a                 | ret                 
            //   4863432c             | test                eax, eax
            //   85c0                 | jle                 0x5b4
            //   7e0a                 | test                eax, eax
            //   488bc8               | je                  0x5b6

        $sequence_2 = { 741c 4489642420 41b940000000 4c8d4308 488b13 488bc8 e8???????? }
            // n = 7, score = 100
            //   741c                 | dec                 eax
            //   4489642420           | cmp                 eax, 0x1f
            //   41b940000000         | ja                  0xa84
            //   4c8d4308             | jb                  0x563
            //   488b13               | dec                 eax
            //   488bc8               | add                 edx, 0x27
            //   e8????????           |                     

        $sequence_3 = { eb07 4863c2 498b04c1 486393f0000000 4963c8 48ffca 4823d1 }
            // n = 7, score = 100
            //   eb07                 | dec                 ecx
            //   4863c2               | mov                 ebx, dword ptr [ebx + 0x18]
            //   498b04c1             | dec                 ecx
            //   486393f0000000       | mov                 esi, dword ptr [ebx + 0x20]
            //   4963c8               | dec                 ecx
            //   48ffca               | mov                 edi, dword ptr [ebx + 0x28]
            //   4823d1               | dec                 ecx

        $sequence_4 = { f20f104c2438 f20f114810 b001 eb02 32c0 488b9c2480000000 4883c440 }
            // n = 7, score = 100
            //   f20f104c2438         | dec                 eax
            //   f20f114810           | mov                 edx, edi
            //   b001                 | dec                 esp
            //   eb02                 | mov                 eax, dword ptr [edi + 0x18]
            //   32c0                 | test                eax, eax
            //   488b9c2480000000     | mov                 eax, 0xffffffdb
            //   4883c440             | test                eax, eax

        $sequence_5 = { c3 4589b760020000 4889742448 48897c2458 498bcd e8???????? 898424a0000000 }
            // n = 7, score = 100
            //   c3                   | mov                 edx, dword ptr [eax]
            //   4589b760020000       | dec                 eax
            //   4889742448           | test                edx, edx
            //   48897c2458           | je                  0x929
            //   498bcd               | dec                 eax
            //   e8????????           |                     
            //   898424a0000000       | mov                 edx, dword ptr [edx]

        $sequence_6 = { e9???????? 85c0 7532 488d154e9f0400 488d4c2420 e8???????? 90 }
            // n = 7, score = 100
            //   e9????????           |                     
            //   85c0                 | cwde                
            //   7532                 | inc                 esp
            //   488d154e9f0400       | cmp                 byte ptr [ebx + 0x41], ch
            //   488d4c2420           | je                  0x106b
            //   e8????????           |                     
            //   90                   | dec                 esp

        $sequence_7 = { e8???????? 488b4b08 e8???????? 48892b ff8f20030000 48ffc6 4883c328 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   488b4b08             | mov                 dword ptr [esp + 0x28], ebx
            //   e8????????           |                     
            //   48892b               | cmp                 eax, esi
            //   ff8f20030000         | ret                 
            //   48ffc6               | dec                 eax
            //   4883c328             | lea                 eax, [0x55cc9]

        $sequence_8 = { 81e1ffffff0f 741e 8b06 25ffffff0f 3bc1 7513 488b4320 }
            // n = 7, score = 100
            //   81e1ffffff0f         | dec                 eax
            //   741e                 | mov                 esi, dword ptr [esp + 0x70]
            //   8b06                 | dec                 esp
            //   25ffffff0f           | mov                 eax, esi
            //   3bc1                 | jne                 0x520
            //   7513                 | dec                 eax
            //   488b4320             | mov                 dword ptr [esp + 0x30], ebx

        $sequence_9 = { b801000000 874360 4c8b01 488bd5 41ff5020 488b07 }
            // n = 6, score = 100
            //   b801000000           | sub                 edx, 1
            //   874360               | jne                 0xb7c
            //   4c8b01               | jmp                 0xb8f
            //   488bd5               | dec                 eax
            //   41ff5020             | arpl                dx, ax
            //   488b07               | nop                 

    condition:
        7 of them and filesize < 2537472
}