rule win_norobot_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.norobot."
        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.norobot"
        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 = { 488bd9 e8???????? 4c63e0 488d15510d0200 33ff 498bcc 83e13f }
            // n = 7, score = 100
            //   488bd9               | add                 eax, edi
            //   e8????????           |                     
            //   4c63e0               | jne                 0x686
            //   488d15510d0200       | dec                 eax
            //   33ff                 | mov                 eax, dword ptr [ebp + 0x1a0]
            //   498bcc               | dec                 eax
            //   83e13f               | mov                 ecx, dword ptr [eax + 0x88]

        $sequence_1 = { eb9e 488bc6 4c8bfe 49c1ff06 488d0d85160200 83e03f }
            // n = 6, score = 100
            //   eb9e                 | lea                 ecx, [0x29ca1]
            //   488bc6               | dec                 eax
            //   4c8bfe               | mov                 dword ptr [eax], ecx
            //   49c1ff06             | dec                 eax
            //   488d0d85160200       | mov                 eax, dword ptr [esp + 0xb0]
            //   83e03f               | dec                 eax

        $sequence_2 = { 4c8d0df1190100 488be9 4c8d05df190100 488d15e0190100 }
            // n = 4, score = 100
            //   4c8d0df1190100       | dec                 eax
            //   488be9               | lea                 eax, [0x1e4a0]
            //   4c8d05df190100       | dec                 eax
            //   488d15e0190100       | lea                 ecx, [eax + 8]

        $sequence_3 = { 488b442420 4883f8ff 74c5 488bd7 4c8d05b7100200 83e23f }
            // n = 6, score = 100
            //   488b442420           | dec                 eax
            //   4883f8ff             | mov                 eax, esi
            //   74c5                 | dec                 esp
            //   488bd7               | mov                 edi, esi
            //   4c8d05b7100200       | dec                 ecx
            //   83e23f               | sar                 edi, 6

        $sequence_4 = { 4c8d054f750000 41f644400201 7410 0fb6ca 498b8210010000 0fb61408 eb49 }
            // n = 7, score = 100
            //   4c8d054f750000       | dec                 esp
            //   41f644400201         | mov                 edx, dword ptr [ebp + 0x77]
            //   7410                 | dec                 eax
            //   0fb6ca               | lea                 eax, [0x1e129]
            //   498b8210010000       | movups              xmm0, xmmword ptr [eax]
            //   0fb61408             | dec                 eax
            //   eb49                 | sub                 esp, 0xe0

        $sequence_5 = { 488d157e170100 e8???????? 4c8d0d92170100 b913000000 4c8d057e170100 }
            // n = 5, score = 100
            //   488d157e170100       | dec                 eax
            //   e8????????           |                     
            //   4c8d0d92170100       | add                 esp, 0x88
            //   b913000000           | ret                 
            //   4c8d057e170100       | dec                 eax

        $sequence_6 = { 488d0dc6930300 e8???????? 488b4c2468 4c8bc1 488bd0 488d8c2480000000 e8???????? }
            // n = 7, score = 100
            //   488d0dc6930300       | dec                 ecx
            //   e8????????           |                     
            //   488b4c2468           | mov                 edx, ecx
            //   4c8bc1               | inc                 ecx
            //   488bd0               | pop                 esp
            //   488d8c2480000000     | pop                 edi
            //   e8????????           |                     

        $sequence_7 = { 488b542468 488d0d1a8e0200 e8???????? 4c8b18 488b05???????? 4c33d8 }
            // n = 6, score = 100
            //   488b542468           | movzx               ecx, byte ptr [ebx]
            //   488d0d1a8e0200       | inc                 edx
            //   e8????????           |                     
            //   4c8b18               | movsx               eax, byte ptr [ecx + ebx + 0x3a4c0]
            //   488b05????????       |                     
            //   4c33d8               | test                eax, eax

        $sequence_8 = { c744247804000000 48c744242000000000 4c8d4c2478 4c8d44247c ba13000020 488b4c2440 ff15???????? }
            // n = 7, score = 100
            //   c744247804000000     | lea                 eax, [esp + 0x110]
            //   48c744242000000000     | dec    esp
            //   4c8d4c2478           | mov                 eax, eax
            //   4c8d44247c           | dec                 eax
            //   ba13000020           | lea                 edx, [esp + 0x50]
            //   488b4c2440           | dec                 eax
            //   ff15????????         |                     

        $sequence_9 = { 4863c2 488d0c80 488d0573f90200 488d0cc8 e8???????? 488bc3 4883c420 }
            // n = 7, score = 100
            //   4863c2               | test                al, al
            //   488d0c80             | je                  0x230
            //   488d0573f90200       | dec                 eax
            //   488d0cc8             | lea                 edx, [0x1ee92]
            //   e8????????           |                     
            //   488bc3               | dec                 eax
            //   4883c420             | lea                 ecx, [0x1ee4b]

    condition:
        7 of them and filesize < 545792
}