rule win_dorkbot_ngrbot_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        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 = "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 = { 25ff000000 038c8604040000 53 6a00 51 e8???????? }
            // n = 6, score = 200
            //   25ff000000           | and                 eax, 0xff
            //   038c8604040000       | add                 ecx, dword ptr [esi + eax*4 + 0x404]
            //   53                   | push                ebx
            //   6a00                 | push                0
            //   51                   | push                ecx
            //   e8????????           |                     

        $sequence_1 = { e8???????? 83c41c a3???????? e8???????? 68???????? 68???????? e8???????? }
            // n = 7, score = 200
            //   e8????????           |                     
            //   83c41c               | add                 esp, 0x1c
            //   a3????????           |                     
            //   e8????????           |                     
            //   68????????           |                     
            //   68????????           |                     
            //   e8????????           |                     

        $sequence_2 = { 52 ff15???????? 6a00 8d85f8feffff 50 68???????? e9???????? }
            // n = 7, score = 200
            //   52                   | push                edx
            //   ff15????????         |                     
            //   6a00                 | push                0
            //   8d85f8feffff         | lea                 eax, [ebp - 0x108]
            //   50                   | push                eax
            //   68????????           |                     
            //   e9????????           |                     

        $sequence_3 = { 51 6a1b e8???????? 50 ff15???????? 5e 85c0 }
            // n = 7, score = 200
            //   51                   | push                ecx
            //   6a1b                 | push                0x1b
            //   e8????????           |                     
            //   50                   | push                eax
            //   ff15????????         |                     
            //   5e                   | pop                 esi
            //   85c0                 | test                eax, eax

        $sequence_4 = { b8???????? 8b08 51 56 e8???????? 83c408 3bc3 }
            // n = 7, score = 200
            //   b8????????           |                     
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   51                   | push                ecx
            //   56                   | push                esi
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   3bc3                 | cmp                 eax, ebx

        $sequence_5 = { 33f6 8da42400000000 a1???????? 6a00 53 57 }
            // n = 6, score = 200
            //   33f6                 | xor                 esi, esi
            //   8da42400000000       | lea                 esp, [esp]
            //   a1????????           |                     
            //   6a00                 | push                0
            //   53                   | push                ebx
            //   57                   | push                edi

        $sequence_6 = { 837d1000 7507 33c0 5b 8be5 5d c3 }
            // n = 7, score = 200
            //   837d1000             | cmp                 dword ptr [ebp + 0x10], 0
            //   7507                 | jne                 9
            //   33c0                 | xor                 eax, eax
            //   5b                   | pop                 ebx
            //   8be5                 | mov                 esp, ebp
            //   5d                   | pop                 ebp
            //   c3                   | ret                 

        $sequence_7 = { 8b550c 50 8b04b508643a02 51 52 50 68???????? }
            // n = 7, score = 200
            //   8b550c               | mov                 edx, dword ptr [ebp + 0xc]
            //   50                   | push                eax
            //   8b04b508643a02       | mov                 eax, dword ptr [esi*4 + 0x23a6408]
            //   51                   | push                ecx
            //   52                   | push                edx
            //   50                   | push                eax
            //   68????????           |                     

        $sequence_8 = { 85c0 0f8419010000 8b4e24 8b5618 6a00 51 50 }
            // n = 7, score = 200
            //   85c0                 | test                eax, eax
            //   0f8419010000         | je                  0x11f
            //   8b4e24               | mov                 ecx, dword ptr [esi + 0x24]
            //   8b5618               | mov                 edx, dword ptr [esi + 0x18]
            //   6a00                 | push                0
            //   51                   | push                ecx
            //   50                   | push                eax

        $sequence_9 = { 8b4508 68???????? 50 e8???????? 83c408 f7d8 1bc0 }
            // n = 7, score = 200
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   68????????           |                     
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   f7d8                 | neg                 eax
            //   1bc0                 | sbb                 eax, eax

    condition:
        7 of them and filesize < 638976
}