rule win_dubrute_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.dubrute."
        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.dubrute"
        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 = { 0f8756010000 ff249d8e254200 83f83c 0f8546010000 2bfe 747c }
            // n = 6, score = 100
            //   0f8756010000         | ja                  0x15c
            //   ff249d8e254200       | jmp                 dword ptr [ebx*4 + 0x42258e]
            //   83f83c               | cmp                 eax, 0x3c
            //   0f8546010000         | jne                 0x14c
            //   2bfe                 | sub                 edi, esi
            //   747c                 | je                  0x7e

        $sequence_1 = { 7401 48 8b4d0c 3b4df8 7350 8b4dfc }
            // n = 6, score = 100
            //   7401                 | je                  3
            //   48                   | dec                 eax
            //   8b4d0c               | mov                 ecx, dword ptr [ebp + 0xc]
            //   3b4df8               | cmp                 ecx, dword ptr [ebp - 8]
            //   7350                 | jae                 0x52
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]

        $sequence_2 = { 0f8846020000 3bc8 7742 85c9 7404 d1e1 eb03 }
            // n = 7, score = 100
            //   0f8846020000         | js                  0x24c
            //   3bc8                 | cmp                 ecx, eax
            //   7742                 | ja                  0x44
            //   85c9                 | test                ecx, ecx
            //   7404                 | je                  6
            //   d1e1                 | shl                 ecx, 1
            //   eb03                 | jmp                 5

        $sequence_3 = { 8d45e8 50 ff75f8 57 eb63 80fa03 7271 }
            // n = 7, score = 100
            //   8d45e8               | lea                 eax, [ebp - 0x18]
            //   50                   | push                eax
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   57                   | push                edi
            //   eb63                 | jmp                 0x65
            //   80fa03               | cmp                 dl, 3
            //   7271                 | jb                  0x73

        $sequence_4 = { 8b7d0c 83c40c 8b460c 394518 7303 8b4518 8d4df8 }
            // n = 7, score = 100
            //   8b7d0c               | mov                 edi, dword ptr [ebp + 0xc]
            //   83c40c               | add                 esp, 0xc
            //   8b460c               | mov                 eax, dword ptr [esi + 0xc]
            //   394518               | cmp                 dword ptr [ebp + 0x18], eax
            //   7303                 | jae                 5
            //   8b4518               | mov                 eax, dword ptr [ebp + 0x18]
            //   8d4df8               | lea                 ecx, [ebp - 8]

        $sequence_5 = { 85ff 0f841c010000 ff4510 8bc7 034304 3bf8 }
            // n = 6, score = 100
            //   85ff                 | test                edi, edi
            //   0f841c010000         | je                  0x122
            //   ff4510               | inc                 dword ptr [ebp + 0x10]
            //   8bc7                 | mov                 eax, edi
            //   034304               | add                 eax, dword ptr [ebx + 4]
            //   3bf8                 | cmp                 edi, eax

        $sequence_6 = { 0107 ff06 8b06 0fb600 c1e010 0107 ff06 }
            // n = 7, score = 100
            //   0107                 | add                 dword ptr [edi], eax
            //   ff06                 | inc                 dword ptr [esi]
            //   8b06                 | mov                 eax, dword ptr [esi]
            //   0fb600               | movzx               eax, byte ptr [eax]
            //   c1e010               | shl                 eax, 0x10
            //   0107                 | add                 dword ptr [edi], eax
            //   ff06                 | inc                 dword ptr [esi]

        $sequence_7 = { 0345f4 8945e4 ff751c 8b4714 ff7518 ff7724 51 }
            // n = 7, score = 100
            //   0345f4               | add                 eax, dword ptr [ebp - 0xc]
            //   8945e4               | mov                 dword ptr [ebp - 0x1c], eax
            //   ff751c               | push                dword ptr [ebp + 0x1c]
            //   8b4714               | mov                 eax, dword ptr [edi + 0x14]
            //   ff7518               | push                dword ptr [ebp + 0x18]
            //   ff7724               | push                dword ptr [edi + 0x24]
            //   51                   | push                ecx

        $sequence_8 = { 85c0 59 7c54 8b750c 8806 46 83e7f8 }
            // n = 7, score = 100
            //   85c0                 | test                eax, eax
            //   59                   | pop                 ecx
            //   7c54                 | jl                  0x56
            //   8b750c               | mov                 esi, dword ptr [ebp + 0xc]
            //   8806                 | mov                 byte ptr [esi], al
            //   46                   | inc                 esi
            //   83e7f8               | and                 edi, 0xfffffff8

        $sequence_9 = { ff7004 e8???????? 8bf0 6a08 68???????? ff36 e8???????? }
            // n = 7, score = 100
            //   ff7004               | push                dword ptr [eax + 4]
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   6a08                 | push                8
            //   68????????           |                     
            //   ff36                 | push                dword ptr [esi]
            //   e8????????           |                     

    condition:
        7 of them and filesize < 598016
}