rule win_dnspionage_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-11-21"
        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 = "20221118"
        malpedia_hash = "e0702e2e6d1d00da65c8a29a4ebacd0a4c59e1af"
        malpedia_version = "20221125"
        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 = { e8???????? 8be5 5d c3 8d045b 99 83e203 }
            // n = 7, score = 300
            //   e8????????           |                     
            //   8be5                 | mov                 esp, ebp
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   8d045b               | lea                 eax, [ebx + ebx*2]
            //   99                   | cdq                 
            //   83e203               | and                 edx, 3

        $sequence_1 = { 51 e8???????? 8bc8 83c404 8bc7 }
            // n = 5, score = 300
            //   51                   | push                ecx
            //   e8????????           |                     
            //   8bc8                 | mov                 ecx, eax
            //   83c404               | add                 esp, 4
            //   8bc7                 | mov                 eax, edi

        $sequence_2 = { 81e7fffdffff f7460c00020000 7511 8b4620 85c0 740a }
            // n = 6, score = 300
            //   81e7fffdffff         | and                 edi, 0xfffffdff
            //   f7460c00020000       | test                dword ptr [esi + 0xc], 0x200
            //   7511                 | jne                 0x13
            //   8b4620               | mov                 eax, dword ptr [esi + 0x20]
            //   85c0                 | test                eax, eax
            //   740a                 | je                  0xc

        $sequence_3 = { 50 eb32 83f8fe 752c 6aff 53 ff15???????? }
            // n = 7, score = 300
            //   50                   | push                eax
            //   eb32                 | jmp                 0x34
            //   83f8fe               | cmp                 eax, -2
            //   752c                 | jne                 0x2e
            //   6aff                 | push                -1
            //   53                   | push                ebx
            //   ff15????????         |                     

        $sequence_4 = { 884df9 85f6 7e1b 56 8d4df8 }
            // n = 5, score = 300
            //   884df9               | mov                 byte ptr [ebp - 7], cl
            //   85f6                 | test                esi, esi
            //   7e1b                 | jle                 0x1d
            //   56                   | push                esi
            //   8d4df8               | lea                 ecx, [ebp - 8]

        $sequence_5 = { 75a5 5f 5e 8b4dfc 33c0 }
            // n = 5, score = 300
            //   75a5                 | jne                 0xffffffa7
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   33c0                 | xor                 eax, eax

        $sequence_6 = { 0f57c0 0f1106 0f114610 660fd64620 f20f1005???????? c7460c08000000 }
            // n = 6, score = 300
            //   0f57c0               | xorps               xmm0, xmm0
            //   0f1106               | movups              xmmword ptr [esi], xmm0
            //   0f114610             | movups              xmmword ptr [esi + 0x10], xmm0
            //   660fd64620           | movq                qword ptr [esi + 0x20], xmm0
            //   f20f1005????????     |                     
            //   c7460c08000000       | mov                 dword ptr [esi + 0xc], 8

        $sequence_7 = { 0f114610 660fd64620 f20f1005???????? c7460c08000000 f20f114618 c74614ffffffff }
            // n = 6, score = 300
            //   0f114610             | movups              xmmword ptr [esi + 0x10], xmm0
            //   660fd64620           | movq                qword ptr [esi + 0x20], xmm0
            //   f20f1005????????     |                     
            //   c7460c08000000       | mov                 dword ptr [esi + 0xc], 8
            //   f20f114618           | movsd               qword ptr [esi + 0x18], xmm0
            //   c74614ffffffff       | mov                 dword ptr [esi + 0x14], 0xffffffff

        $sequence_8 = { 51 e8???????? 8b4de4 83c414 8b45ec }
            // n = 5, score = 300
            //   51                   | push                ecx
            //   e8????????           |                     
            //   8b4de4               | mov                 ecx, dword ptr [ebp - 0x1c]
            //   83c414               | add                 esp, 0x14
            //   8b45ec               | mov                 eax, dword ptr [ebp - 0x14]

        $sequence_9 = { ff15???????? 83bdf8feffff00 764a ff15???????? 85c0 7540 8b85f8feffff }
            // n = 7, score = 300
            //   ff15????????         |                     
            //   83bdf8feffff00       | cmp                 dword ptr [ebp - 0x108], 0
            //   764a                 | jbe                 0x4c
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7540                 | jne                 0x42
            //   8b85f8feffff         | mov                 eax, dword ptr [ebp - 0x108]

    condition:
        7 of them and filesize < 786432
}