rule win_wpbrutebot_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.wpbrutebot."
        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.wpbrutebot"
        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 = { ffd0 8d442438 50 8d442440 50 8d8694050000 50 }
            // n = 7, score = 100
            //   ffd0                 | call                eax
            //   8d442438             | lea                 eax, [esp + 0x38]
            //   50                   | push                eax
            //   8d442440             | lea                 eax, [esp + 0x40]
            //   50                   | push                eax
            //   8d8694050000         | lea                 eax, [esi + 0x594]
            //   50                   | push                eax

        $sequence_1 = { ffb7c80f0000 68???????? e8???????? 83c418 eb1f ffb7ec0f0000 ffb7e80f0000 }
            // n = 7, score = 100
            //   ffb7c80f0000         | push                dword ptr [edi + 0xfc8]
            //   68????????           |                     
            //   e8????????           |                     
            //   83c418               | add                 esp, 0x18
            //   eb1f                 | jmp                 0x21
            //   ffb7ec0f0000         | push                dword ptr [edi + 0xfec]
            //   ffb7e80f0000         | push                dword ptr [edi + 0xfe8]

        $sequence_2 = { ff75fc 894608 51 8b0e e8???????? 83c408 8bc6 }
            // n = 7, score = 100
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   894608               | mov                 dword ptr [esi + 8], eax
            //   51                   | push                ecx
            //   8b0e                 | mov                 ecx, dword ptr [esi]
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   8bc6                 | mov                 eax, esi

        $sequence_3 = { 85c0 0f8553020000 53 57 56 e8???????? 83c40c }
            // n = 7, score = 100
            //   85c0                 | test                eax, eax
            //   0f8553020000         | jne                 0x259
            //   53                   | push                ebx
            //   57                   | push                edi
            //   56                   | push                esi
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc

        $sequence_4 = { 40 3bc1 72e1 6a02 56 68???????? e8???????? }
            // n = 7, score = 100
            //   40                   | inc                 eax
            //   3bc1                 | cmp                 eax, ecx
            //   72e1                 | jb                  0xffffffe3
            //   6a02                 | push                2
            //   56                   | push                esi
            //   68????????           |                     
            //   e8????????           |                     

        $sequence_5 = { e9???????? 83fa18 7530 51 50 55 e8???????? }
            // n = 7, score = 100
            //   e9????????           |                     
            //   83fa18               | cmp                 edx, 0x18
            //   7530                 | jne                 0x32
            //   51                   | push                ecx
            //   50                   | push                eax
            //   55                   | push                ebp
            //   e8????????           |                     

        $sequence_6 = { ffb7d00c0000 e8???????? 8bd8 83c408 85db 75a6 f687740d000028 }
            // n = 7, score = 100
            //   ffb7d00c0000         | push                dword ptr [edi + 0xcd0]
            //   e8????????           |                     
            //   8bd8                 | mov                 ebx, eax
            //   83c408               | add                 esp, 8
            //   85db                 | test                ebx, ebx
            //   75a6                 | jne                 0xffffffa8
            //   f687740d000028       | test                byte ptr [edi + 0xd74], 0x28

        $sequence_7 = { eb10 83f804 755e 807c244020 0f85130d0000 8b442418 8d0480 }
            // n = 7, score = 100
            //   eb10                 | jmp                 0x12
            //   83f804               | cmp                 eax, 4
            //   755e                 | jne                 0x60
            //   807c244020           | cmp                 byte ptr [esp + 0x40], 0x20
            //   0f85130d0000         | jne                 0xd19
            //   8b442418             | mov                 eax, dword ptr [esp + 0x18]
            //   8d0480               | lea                 eax, [eax + eax*4]

        $sequence_8 = { e8???????? 56 8b74240c 83becc00000000 0f85c6050000 ffb6c8000000 e8???????? }
            // n = 7, score = 100
            //   e8????????           |                     
            //   56                   | push                esi
            //   8b74240c             | mov                 esi, dword ptr [esp + 0xc]
            //   83becc00000000       | cmp                 dword ptr [esi + 0xcc], 0
            //   0f85c6050000         | jne                 0x5cc
            //   ffb6c8000000         | push                dword ptr [esi + 0xc8]
            //   e8????????           |                     

        $sequence_9 = { 7c08 85c0 0f8334010000 8b16 8bc2 8b4e04 23c1 }
            // n = 7, score = 100
            //   7c08                 | jl                  0xa
            //   85c0                 | test                eax, eax
            //   0f8334010000         | jae                 0x13a
            //   8b16                 | mov                 edx, dword ptr [esi]
            //   8bc2                 | mov                 eax, edx
            //   8b4e04               | mov                 ecx, dword ptr [esi + 4]
            //   23c1                 | and                 eax, ecx

    condition:
        7 of them and filesize < 5134336
}