rule win_gameover_dga_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.gameover_dga."
        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.gameover_dga"
        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 = { 32c0 8845fb 0fb6c0 8d1433 6a08 8b4c05d4 e8???????? }
            // n = 7, score = 700
            //   32c0                 | xor                 al, al
            //   8845fb               | mov                 byte ptr [ebp - 5], al
            //   0fb6c0               | movzx               eax, al
            //   8d1433               | lea                 edx, [ebx + esi]
            //   6a08                 | push                8
            //   8b4c05d4             | mov                 ecx, dword ptr [ebp + eax - 0x2c]
            //   e8????????           |                     

        $sequence_1 = { 8b8424b0000000 03842460010000 3bf0 0f8689000000 3bf7 736b 85db }
            // n = 7, score = 700
            //   8b8424b0000000       | mov                 eax, dword ptr [esp + 0xb0]
            //   03842460010000       | add                 eax, dword ptr [esp + 0x160]
            //   3bf0                 | cmp                 esi, eax
            //   0f8689000000         | jbe                 0x8f
            //   3bf7                 | cmp                 esi, edi
            //   736b                 | jae                 0x6d
            //   85db                 | test                ebx, ebx

        $sequence_2 = { c744241804000000 50 6a2d ff742448 ff5560 8b742410 83f801 }
            // n = 7, score = 700
            //   c744241804000000     | mov                 dword ptr [esp + 0x18], 4
            //   50                   | push                eax
            //   6a2d                 | push                0x2d
            //   ff742448             | push                dword ptr [esp + 0x48]
            //   ff5560               | call                dword ptr [ebp + 0x60]
            //   8b742410             | mov                 esi, dword ptr [esp + 0x10]
            //   83f801               | cmp                 eax, 1

        $sequence_3 = { 736a 33d2 33ed 89542420 6a00 55 52 }
            // n = 7, score = 700
            //   736a                 | jae                 0x6c
            //   33d2                 | xor                 edx, edx
            //   33ed                 | xor                 ebp, ebp
            //   89542420             | mov                 dword ptr [esp + 0x20], edx
            //   6a00                 | push                0
            //   55                   | push                ebp
            //   52                   | push                edx

        $sequence_4 = { 8d4c2428 e8???????? 85ff 740e 8b0f e8???????? 8bcf }
            // n = 7, score = 700
            //   8d4c2428             | lea                 ecx, [esp + 0x28]
            //   e8????????           |                     
            //   85ff                 | test                edi, edi
            //   740e                 | je                  0x10
            //   8b0f                 | mov                 ecx, dword ptr [edi]
            //   e8????????           |                     
            //   8bcf                 | mov                 ecx, edi

        $sequence_5 = { 56 6800000200 6a6e e8???????? 8bce 8ad8 e8???????? }
            // n = 7, score = 700
            //   56                   | push                esi
            //   6800000200           | push                0x20000
            //   6a6e                 | push                0x6e
            //   e8????????           |                     
            //   8bce                 | mov                 ecx, esi
            //   8ad8                 | mov                 bl, al
            //   e8????????           |                     

        $sequence_6 = { 89842488000000 8bc2 c1e808 23c7 8984248c000000 8bc2 c1e80a }
            // n = 7, score = 700
            //   89842488000000       | mov                 dword ptr [esp + 0x88], eax
            //   8bc2                 | mov                 eax, edx
            //   c1e808               | shr                 eax, 8
            //   23c7                 | and                 eax, edi
            //   8984248c000000       | mov                 dword ptr [esp + 0x8c], eax
            //   8bc2                 | mov                 eax, edx
            //   c1e80a               | shr                 eax, 0xa

        $sequence_7 = { 33db 50 895f18 ffd6 8b442410 834f54ff 894750 }
            // n = 7, score = 700
            //   33db                 | xor                 ebx, ebx
            //   50                   | push                eax
            //   895f18               | mov                 dword ptr [edi + 0x18], ebx
            //   ffd6                 | call                esi
            //   8b442410             | mov                 eax, dword ptr [esp + 0x10]
            //   834f54ff             | or                  dword ptr [edi + 0x54], 0xffffffff
            //   894750               | mov                 dword ptr [edi + 0x50], eax

        $sequence_8 = { 57 ffd0 8b7c2434 33c9 837c243c64 8bf0 884c2413 }
            // n = 7, score = 700
            //   57                   | push                edi
            //   ffd0                 | call                eax
            //   8b7c2434             | mov                 edi, dword ptr [esp + 0x34]
            //   33c9                 | xor                 ecx, ecx
            //   837c243c64           | cmp                 dword ptr [esp + 0x3c], 0x64
            //   8bf0                 | mov                 esi, eax
            //   884c2413             | mov                 byte ptr [esp + 0x13], cl

        $sequence_9 = { 83e3fe f6c301 744c 8d4d08 51 50 56 }
            // n = 7, score = 700
            //   83e3fe               | and                 ebx, 0xfffffffe
            //   f6c301               | test                bl, 1
            //   744c                 | je                  0x4e
            //   8d4d08               | lea                 ecx, [ebp + 8]
            //   51                   | push                ecx
            //   50                   | push                eax
            //   56                   | push                esi

    condition:
        7 of them and filesize < 540672
}