rule win_anel_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.anel."
        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.anel"
        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 = { 8d75d4 e8???????? 8bd8 8d4508 c645fc01 e8???????? 33db }
            // n = 7, score = 200
            //   8d75d4               | lea                 esi, [ebp - 0x2c]
            //   e8????????           |                     
            //   8bd8                 | mov                 ebx, eax
            //   8d4508               | lea                 eax, [ebp + 8]
            //   c645fc01             | mov                 byte ptr [ebp - 4], 1
            //   e8????????           |                     
            //   33db                 | xor                 ebx, ebx

        $sequence_1 = { 57 ffb3e8010000 ff15???????? 898520feffff ff15???????? 8983ec010000 3d002f0000 }
            // n = 7, score = 200
            //   57                   | push                edi
            //   ffb3e8010000         | push                dword ptr [ebx + 0x1e8]
            //   ff15????????         |                     
            //   898520feffff         | mov                 dword ptr [ebp - 0x1e0], eax
            //   ff15????????         |                     
            //   8983ec010000         | mov                 dword ptr [ebx + 0x1ec], eax
            //   3d002f0000           | cmp                 eax, 0x2f00

        $sequence_2 = { 57 57 57 57 57 51 50 }
            // n = 7, score = 200
            //   57                   | push                edi
            //   57                   | push                edi
            //   57                   | push                edi
            //   57                   | push                edi
            //   57                   | push                edi
            //   51                   | push                ecx
            //   50                   | push                eax

        $sequence_3 = { 7625 57 8bc8 d1e9 bfffffff0f }
            // n = 5, score = 200
            //   7625                 | jbe                 0x27
            //   57                   | push                edi
            //   8bc8                 | mov                 ecx, eax
            //   d1e9                 | shr                 ecx, 1
            //   bfffffff0f           | mov                 edi, 0xfffffff

        $sequence_4 = { 51 8d443801 50 e8???????? 8a5508 83c40c }
            // n = 6, score = 200
            //   51                   | push                ecx
            //   8d443801             | lea                 eax, [eax + edi + 1]
            //   50                   | push                eax
            //   e8????????           |                     
            //   8a5508               | mov                 dl, byte ptr [ebp + 8]
            //   83c40c               | add                 esp, 0xc

        $sequence_5 = { 50 8d4dd4 8975fc e8???????? c645fc01 83781408 7202 }
            // n = 7, score = 200
            //   50                   | push                eax
            //   8d4dd4               | lea                 ecx, [ebp - 0x2c]
            //   8975fc               | mov                 dword ptr [ebp - 4], esi
            //   e8????????           |                     
            //   c645fc01             | mov                 byte ptr [ebp - 4], 1
            //   83781408             | cmp                 dword ptr [eax + 0x14], 8
            //   7202                 | jb                  4

        $sequence_6 = { 895df8 e8???????? 8b5d08 ff750c 8d041e 50 8bc3 }
            // n = 7, score = 200
            //   895df8               | mov                 dword ptr [ebp - 8], ebx
            //   e8????????           |                     
            //   8b5d08               | mov                 ebx, dword ptr [ebp + 8]
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   8d041e               | lea                 eax, [esi + ebx]
            //   50                   | push                eax
            //   8bc3                 | mov                 eax, ebx

        $sequence_7 = { 53 8d4508 50 83c8ff e8???????? 837f1410 7204 }
            // n = 7, score = 200
            //   53                   | push                ebx
            //   8d4508               | lea                 eax, [ebp + 8]
            //   50                   | push                eax
            //   83c8ff               | or                  eax, 0xffffffff
            //   e8????????           |                     
            //   837f1410             | cmp                 dword ptr [edi + 0x14], 0x10
            //   7204                 | jb                  6

        $sequence_8 = { 45 fc 03e8 4d 1200 006a01 33ff }
            // n = 7, score = 200
            //   45                   | inc                 ebp
            //   fc                   | cld                 
            //   03e8                 | add                 ebp, eax
            //   4d                   | dec                 ebp
            //   1200                 | adc                 al, byte ptr [eax]
            //   006a01               | add                 byte ptr [edx + 1], ch
            //   33ff                 | xor                 edi, edi

        $sequence_9 = { 8b5d08 e9???????? 8d75d8 e9???????? 8b5d08 81c3d0000000 }
            // n = 6, score = 200
            //   8b5d08               | mov                 ebx, dword ptr [ebp + 8]
            //   e9????????           |                     
            //   8d75d8               | lea                 esi, [ebp - 0x28]
            //   e9????????           |                     
            //   8b5d08               | mov                 ebx, dword ptr [ebp + 8]
            //   81c3d0000000         | add                 ebx, 0xd0

    condition:
        7 of them and filesize < 376832
}