rule win_dorkbot_ngrbot_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.dorkbot_ngrbot."
        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.dorkbot_ngrbot"
        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 = { 8b4510 85c0 7405 83f810 7505 b810000000 }
            // n = 6, score = 200
            //   8b4510               | mov                 eax, dword ptr [ebp + 0x10]
            //   85c0                 | test                eax, eax
            //   7405                 | je                  7
            //   83f810               | cmp                 eax, 0x10
            //   7505                 | jne                 7
            //   b810000000           | mov                 eax, 0x10

        $sequence_1 = { 50 51 56 e8???????? 83c40c 85c0 7522 }
            // n = 7, score = 200
            //   50                   | push                eax
            //   51                   | push                ecx
            //   56                   | push                esi
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   85c0                 | test                eax, eax
            //   7522                 | jne                 0x24

        $sequence_2 = { 53 53 8d55d4 52 ffd6 85c0 7e2d }
            // n = 7, score = 200
            //   53                   | push                ebx
            //   53                   | push                ebx
            //   8d55d4               | lea                 edx, [ebp - 0x2c]
            //   52                   | push                edx
            //   ffd6                 | call                esi
            //   85c0                 | test                eax, eax
            //   7e2d                 | jle                 0x2f

        $sequence_3 = { 740a 8d4614 50 ff15???????? c70700000000 8b4e08 894f04 }
            // n = 7, score = 200
            //   740a                 | je                  0xc
            //   8d4614               | lea                 eax, [esi + 0x14]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   c70700000000         | mov                 dword ptr [edi], 0
            //   8b4e08               | mov                 ecx, dword ptr [esi + 8]
            //   894f04               | mov                 dword ptr [edi + 4], ecx

        $sequence_4 = { 68???????? ffd3 56 68???????? ffd3 8bc7 }
            // n = 6, score = 200
            //   68????????           |                     
            //   ffd3                 | call                ebx
            //   56                   | push                esi
            //   68????????           |                     
            //   ffd3                 | call                ebx
            //   8bc7                 | mov                 eax, edi

        $sequence_5 = { 52 6a00 6a08 6a01 57 e8???????? 85c0 }
            // n = 7, score = 200
            //   52                   | push                edx
            //   6a00                 | push                0
            //   6a08                 | push                8
            //   6a01                 | push                1
            //   57                   | push                edi
            //   e8????????           |                     
            //   85c0                 | test                eax, eax

        $sequence_6 = { 38480c 740c 8b4004 85c0 75f4 33c0 5e }
            // n = 7, score = 200
            //   38480c               | cmp                 byte ptr [eax + 0xc], cl
            //   740c                 | je                  0xe
            //   8b4004               | mov                 eax, dword ptr [eax + 4]
            //   85c0                 | test                eax, eax
            //   75f4                 | jne                 0xfffffff6
            //   33c0                 | xor                 eax, eax
            //   5e                   | pop                 esi

        $sequence_7 = { 8b0e 68???????? 51 e8???????? 83c410 85c0 0f8427070000 }
            // n = 7, score = 200
            //   8b0e                 | mov                 ecx, dword ptr [esi]
            //   68????????           |                     
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   85c0                 | test                eax, eax
            //   0f8427070000         | je                  0x72d

        $sequence_8 = { 8b7508 53 56 e8???????? 83c408 85c0 7408 }
            // n = 7, score = 200
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   53                   | push                ebx
            //   56                   | push                esi
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   85c0                 | test                eax, eax
            //   7408                 | je                  0xa

        $sequence_9 = { 0bca 894808 8b4508 50 8d4608 50 e8???????? }
            // n = 7, score = 200
            //   0bca                 | or                  ecx, edx
            //   894808               | mov                 dword ptr [eax + 8], ecx
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   50                   | push                eax
            //   8d4608               | lea                 eax, [esi + 8]
            //   50                   | push                eax
            //   e8????????           |                     

    condition:
        7 of them and filesize < 638976
}