rule win_dnspionage_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.dnspionage."
        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.dnspionage"
        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 = { 8bf8 85f6 7e14 8bcf }
            // n = 4, score = 300
            //   8bf8                 | mov                 edi, eax
            //   85f6                 | test                esi, esi
            //   7e14                 | jle                 0x16
            //   8bcf                 | mov                 ecx, edi

        $sequence_1 = { 2bf9 8d4e01 8a06 46 }
            // n = 4, score = 300
            //   2bf9                 | sub                 edi, ecx
            //   8d4e01               | lea                 ecx, [esi + 1]
            //   8a06                 | mov                 al, byte ptr [esi]
            //   46                   | inc                 esi

        $sequence_2 = { c6843518feffff00 8d8500feffff 50 6a00 ff15???????? }
            // n = 5, score = 300
            //   c6843518feffff00     | mov                 byte ptr [ebp + esi - 0x1e8], 0
            //   8d8500feffff         | lea                 eax, [ebp - 0x200]
            //   50                   | push                eax
            //   6a00                 | push                0
            //   ff15????????         |                     

        $sequence_3 = { 75f2 6a00 c6043300 e8???????? }
            // n = 4, score = 300
            //   75f2                 | jne                 0xfffffff4
            //   6a00                 | push                0
            //   c6043300             | mov                 byte ptr [ebx + esi], 0
            //   e8????????           |                     

        $sequence_4 = { 53 8bd9 56 57 6a28 895dfc 8903 }
            // n = 7, score = 300
            //   53                   | push                ebx
            //   8bd9                 | mov                 ebx, ecx
            //   56                   | push                esi
            //   57                   | push                edi
            //   6a28                 | push                0x28
            //   895dfc               | mov                 dword ptr [ebp - 4], ebx
            //   8903                 | mov                 dword ptr [ebx], eax

        $sequence_5 = { 8b01 ff5010 33c0 5b }
            // n = 4, score = 300
            //   8b01                 | mov                 eax, dword ptr [ecx]
            //   ff5010               | call                dword ptr [eax + 0x10]
            //   33c0                 | xor                 eax, eax
            //   5b                   | pop                 ebx

        $sequence_6 = { 8bd7 894f20 8bcb 89470c e8???????? 85f6 7448 }
            // n = 7, score = 300
            //   8bd7                 | mov                 edx, edi
            //   894f20               | mov                 dword ptr [edi + 0x20], ecx
            //   8bcb                 | mov                 ecx, ebx
            //   89470c               | mov                 dword ptr [edi + 0xc], eax
            //   e8????????           |                     
            //   85f6                 | test                esi, esi
            //   7448                 | je                  0x4a

        $sequence_7 = { 894f0c 894704 8d45f4 894708 eb02 }
            // n = 5, score = 300
            //   894f0c               | mov                 dword ptr [edi + 0xc], ecx
            //   894704               | mov                 dword ptr [edi + 4], eax
            //   8d45f4               | lea                 eax, [ebp - 0xc]
            //   894708               | mov                 dword ptr [edi + 8], eax
            //   eb02                 | jmp                 4

        $sequence_8 = { 8ac4 8855f8 8a55f6 8aca c0e004 c0f902 80e10f }
            // n = 7, score = 300
            //   8ac4                 | mov                 al, ah
            //   8855f8               | mov                 byte ptr [ebp - 8], dl
            //   8a55f6               | mov                 dl, byte ptr [ebp - 0xa]
            //   8aca                 | mov                 cl, dl
            //   c0e004               | shl                 al, 4
            //   c0f902               | sar                 cl, 2
            //   80e10f               | and                 cl, 0xf

        $sequence_9 = { 33c5 8945fc 8a4508 384120 7512 b001 8b4dfc }
            // n = 7, score = 300
            //   33c5                 | xor                 eax, ebp
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   8a4508               | mov                 al, byte ptr [ebp + 8]
            //   384120               | cmp                 byte ptr [ecx + 0x20], al
            //   7512                 | jne                 0x14
            //   b001                 | mov                 al, 1
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]

    condition:
        7 of them and filesize < 786432
}