rule win_xpertrat_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.xpertrat."
        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.xpertrat"
        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 = { ff08 40 0430 ff0a 4c 000c00 }
            // n = 6, score = 200
            //   ff08                 | dec                 dword ptr [eax]
            //   40                   | inc                 eax
            //   0430                 | add                 al, 0x30
            //   ff0a                 | dec                 dword ptr [edx]
            //   4c                   | dec                 esp
            //   000c00               | add                 byte ptr [eax + eax], cl

        $sequence_1 = { 008a3800cc1c 5e 006c70ff 0808 008f38001b26 001b 0d002a2364 }
            // n = 7, score = 200
            //   008a3800cc1c         | add                 byte ptr [edx + 0x1ccc0038], cl
            //   5e                   | pop                 esi
            //   006c70ff             | add                 byte ptr [eax + esi*2 - 1], ch
            //   0808                 | or                  byte ptr [eax], cl
            //   008f38001b26         | add                 byte ptr [edi + 0x261b0038], cl
            //   001b                 | add                 byte ptr [ebx], bl
            //   0d002a2364           | or                  eax, 0x64232a00

        $sequence_2 = { 001b 0d002a2364 ff08 0800 }
            // n = 4, score = 200
            //   001b                 | add                 byte ptr [ebx], bl
            //   0d002a2364           | or                  eax, 0x64232a00
            //   ff08                 | dec                 dword ptr [eax]
            //   0800                 | or                  byte ptr [eax], al

        $sequence_3 = { ff05???????? 000d???????? 0878ff 0d98000700 6e 74ff }
            // n = 6, score = 200
            //   ff05????????         |                     
            //   000d????????         |                     
            //   0878ff               | or                  byte ptr [eax - 1], bh
            //   0d98000700           | or                  eax, 0x70098
            //   6e                   | outsb               dx, byte ptr [esi]
            //   74ff                 | je                  1

        $sequence_4 = { 000d???????? 0870ff 0d80000700 0474 ff0478 }
            // n = 5, score = 200
            //   000d????????         |                     
            //   0870ff               | or                  byte ptr [eax - 1], dh
            //   0d80000700           | or                  eax, 0x70080
            //   0474                 | add                 al, 0x74
            //   ff0478               | inc                 dword ptr [eax + edi*2]

        $sequence_5 = { 0000 ae 045c ff4d40 ff08 40 }
            // n = 6, score = 200
            //   0000                 | add                 byte ptr [eax], al
            //   ae                   | scasb               al, byte ptr es:[edi]
            //   045c                 | add                 al, 0x5c
            //   ff4d40               | dec                 dword ptr [ebp + 0x40]
            //   ff08                 | dec                 dword ptr [eax]
            //   40                   | inc                 eax

        $sequence_6 = { 0000 00a1cc004400 0bc0 7402 }
            // n = 4, score = 200
            //   0000                 | add                 byte ptr [eax], al
            //   00a1cc004400         | add                 byte ptr [ecx + 0x4400cc], ah
            //   0bc0                 | or                  eax, eax
            //   7402                 | je                  4

        $sequence_7 = { 6c 70ff 0808 008a3800cc1c }
            // n = 4, score = 200
            //   6c                   | insb                byte ptr es:[edi], dx
            //   70ff                 | jo                  1
            //   0808                 | or                  byte ptr [eax], cl
            //   008a3800cc1c         | add                 byte ptr [edx + 0x1ccc0038], cl

        $sequence_8 = { ff15???????? 83bbd800000001 8d83fc000000 898534f6ffff }
            // n = 4, score = 100
            //   ff15????????         |                     
            //   83bbd800000001       | cmp                 dword ptr [ebx + 0xd8], 1
            //   8d83fc000000         | lea                 eax, [ebx + 0xfc]
            //   898534f6ffff         | mov                 dword ptr [ebp - 0x9cc], eax

        $sequence_9 = { ff15???????? 83bd1cffffff00 7505 e9???????? }
            // n = 4, score = 100
            //   ff15????????         |                     
            //   83bd1cffffff00       | cmp                 dword ptr [ebp - 0xe4], 0
            //   7505                 | jne                 7
            //   e9????????           |                     

        $sequence_10 = { ff15???????? 83bd8cfeffff00 0f84b0050000 c745fc0a000000 }
            // n = 4, score = 100
            //   ff15????????         |                     
            //   83bd8cfeffff00       | cmp                 dword ptr [ebp - 0x174], 0
            //   0f84b0050000         | je                  0x5b6
            //   c745fc0a000000       | mov                 dword ptr [ebp - 4], 0xa

        $sequence_11 = { ff15???????? 83bd8cfeffff00 7405 e9???????? }
            // n = 4, score = 100
            //   ff15????????         |                     
            //   83bd8cfeffff00       | cmp                 dword ptr [ebp - 0x174], 0
            //   7405                 | je                  7
            //   e9????????           |                     

        $sequence_12 = { ff15???????? 83bd70ffffff00 0f84ca010000 c745fc1a000000 }
            // n = 4, score = 100
            //   ff15????????         |                     
            //   83bd70ffffff00       | cmp                 dword ptr [ebp - 0x90], 0
            //   0f84ca010000         | je                  0x1d0
            //   c745fc1a000000       | mov                 dword ptr [ebp - 4], 0x1a

        $sequence_13 = { ff15???????? 83bbd800000001 0f8546010000 8d4dd8 }
            // n = 4, score = 100
            //   ff15????????         |                     
            //   83bbd800000001       | cmp                 dword ptr [ebx + 0xd8], 1
            //   0f8546010000         | jne                 0x14c
            //   8d4dd8               | lea                 ecx, [ebp - 0x28]

        $sequence_14 = { ff15???????? 83bc24a000000005 7c0c 5f }
            // n = 4, score = 100
            //   ff15????????         |                     
            //   83bc24a000000005     | cmp                 dword ptr [esp + 0xa0], 5
            //   7c0c                 | jl                  0xe
            //   5f                   | pop                 edi

        $sequence_15 = { ff15???????? 83bb9400000001 8d83b8000000 89853cf6ffff 8985b4fcffff c785acfcffff03400000 0f8533010000 }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   83bb9400000001       | cmp                 dword ptr [ebx + 0x94], 1
            //   8d83b8000000         | lea                 eax, [ebx + 0xb8]
            //   89853cf6ffff         | mov                 dword ptr [ebp - 0x9c4], eax
            //   8985b4fcffff         | mov                 dword ptr [ebp - 0x34c], eax
            //   c785acfcffff03400000     | mov    dword ptr [ebp - 0x354], 0x4003
            //   0f8533010000         | jne                 0x139

    condition:
        7 of them and filesize < 8560640
}