rule win_dnspionage_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        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 = "20230705"
        malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
        malpedia_version = "20230715"
        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 = { 6a05 894304 e8???????? 8bd8 ba???????? 8bf3 895d0c }
            // n = 7, score = 300
            //   6a05                 | push                5
            //   894304               | mov                 dword ptr [ebx + 4], eax
            //   e8????????           |                     
            //   8bd8                 | mov                 ebx, eax
            //   ba????????           |                     
            //   8bf3                 | mov                 esi, ebx
            //   895d0c               | mov                 dword ptr [ebp + 0xc], ebx

        $sequence_1 = { 6a2b 51 ff15???????? 83bdf8feffff00 764a ff15???????? 85c0 }
            // n = 7, score = 300
            //   6a2b                 | push                0x2b
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   83bdf8feffff00       | cmp                 dword ptr [ebp - 0x108], 0
            //   764a                 | jbe                 0x4c
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax

        $sequence_2 = { 884437ff 3bca 72f2 8b7dec }
            // n = 4, score = 300
            //   884437ff             | mov                 byte ptr [edi + esi - 1], al
            //   3bca                 | cmp                 ecx, edx
            //   72f2                 | jb                  0xfffffff4
            //   8b7dec               | mov                 edi, dword ptr [ebp - 0x14]

        $sequence_3 = { 8d4e01 51 e8???????? 83c404 8bd8 56 57 }
            // n = 7, score = 300
            //   8d4e01               | lea                 ecx, [esi + 1]
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   8bd8                 | mov                 ebx, eax
            //   56                   | push                esi
            //   57                   | push                edi

        $sequence_4 = { 5d c3 837e1400 7421 8b460c }
            // n = 5, score = 300
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   837e1400             | cmp                 dword ptr [esi + 0x14], 0
            //   7421                 | je                  0x23
            //   8b460c               | mov                 eax, dword ptr [esi + 0xc]

        $sequence_5 = { 03ce 03cf 03ca 0f92c0 f7d8 }
            // n = 5, score = 300
            //   03ce                 | add                 ecx, esi
            //   03cf                 | add                 ecx, edi
            //   03ca                 | add                 ecx, edx
            //   0f92c0               | setb                al
            //   f7d8                 | neg                 eax

        $sequence_6 = { 7905 48 83c8fc 40 7417 }
            // n = 5, score = 300
            //   7905                 | jns                 7
            //   48                   | dec                 eax
            //   83c8fc               | or                  eax, 0xfffffffc
            //   40                   | inc                 eax
            //   7417                 | je                  0x19

        $sequence_7 = { 8bd7 8945e4 8d7201 0f1f00 }
            // n = 4, score = 300
            //   8bd7                 | mov                 edx, edi
            //   8945e4               | mov                 dword ptr [ebp - 0x1c], eax
            //   8d7201               | lea                 esi, [edx + 1]
            //   0f1f00               | nop                 dword ptr [eax]

        $sequence_8 = { 5d c3 53 33db 8bce 395e14 }
            // n = 6, score = 300
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   53                   | push                ebx
            //   33db                 | xor                 ebx, ebx
            //   8bce                 | mov                 ecx, esi
            //   395e14               | cmp                 dword ptr [esi + 0x14], ebx

        $sequence_9 = { 2bca 03f1 56 e8???????? 8bd8 83c408 2bde }
            // n = 7, score = 300
            //   2bca                 | sub                 ecx, edx
            //   03f1                 | add                 esi, ecx
            //   56                   | push                esi
            //   e8????????           |                     
            //   8bd8                 | mov                 ebx, eax
            //   83c408               | add                 esp, 8
            //   2bde                 | sub                 ebx, esi

    condition:
        7 of them and filesize < 786432
}