rule win_dnspionage_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-05-30"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.4.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.dnspionage"
        malpedia_rule_date = "20200529"
        malpedia_hash = "92c362319514e5a6da26204961446caa3a8b32a8"
        malpedia_version = "20200529"
        malpedia_license = "CC BY-NC-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 / approach 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 = { 5e c3 8d5101 6690 8a01 41 }
            // n = 6, score = 300
            //   5e                   | pop                 esi
            //   c3                   | ret                 
            //   8d5101               | lea                 edx, [ecx + 1]
            //   6690                 | nop                 
            //   8a01                 | mov                 al, byte ptr [ecx]
            //   41                   | inc                 ecx

        $sequence_1 = { eb02 33f6 8b460c 034608 034604 0306 50 }
            // n = 7, score = 300
            //   eb02                 | jmp                 4
            //   33f6                 | xor                 esi, esi
            //   8b460c               | mov                 eax, dword ptr [esi + 0xc]
            //   034608               | add                 eax, dword ptr [esi + 8]
            //   034604               | add                 eax, dword ptr [esi + 4]
            //   0306                 | add                 eax, dword ptr [esi]
            //   50                   | push                eax

        $sequence_2 = { 894dfc 57 8bfa 85f6 0f8487000000 }
            // n = 5, score = 300
            //   894dfc               | mov                 dword ptr [ebp - 4], ecx
            //   57                   | push                edi
            //   8bfa                 | mov                 edi, edx
            //   85f6                 | test                esi, esi
            //   0f8487000000         | je                  0x8d

        $sequence_3 = { 85f6 7e1b 56 8d4df8 8d041f }
            // n = 5, score = 300
            //   85f6                 | test                esi, esi
            //   7e1b                 | jle                 0x1d
            //   56                   | push                esi
            //   8d4df8               | lea                 ecx, [ebp - 8]
            //   8d041f               | lea                 eax, [edi + ebx]

        $sequence_4 = { 7d13 ba03000000 2bd6 8a4340 880439 }
            // n = 5, score = 300
            //   7d13                 | jge                 0x15
            //   ba03000000           | mov                 edx, 3
            //   2bd6                 | sub                 edx, esi
            //   8a4340               | mov                 al, byte ptr [ebx + 0x40]
            //   880439               | mov                 byte ptr [ecx + edi], al

        $sequence_5 = { 85db 0f849b000000 85ff 744b b9???????? }
            // n = 5, score = 300
            //   85db                 | test                ebx, ebx
            //   0f849b000000         | je                  0xa1
            //   85ff                 | test                edi, edi
            //   744b                 | je                  0x4d
            //   b9????????           |                     

        $sequence_6 = { 50 6a2b 51 ff15???????? 83bdf8feffff00 }
            // n = 5, score = 300
            //   50                   | push                eax
            //   6a2b                 | push                0x2b
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   83bdf8feffff00       | cmp                 dword ptr [ebp - 0x108], 0

        $sequence_7 = { e8???????? 56 8bf8 e8???????? 8b0b }
            // n = 5, score = 300
            //   e8????????           |                     
            //   56                   | push                esi
            //   8bf8                 | mov                 edi, eax
            //   e8????????           |                     
            //   8b0b                 | mov                 ecx, dword ptr [ebx]

        $sequence_8 = { 7404 c640010a 015e08 85ff }
            // n = 4, score = 300
            //   7404                 | je                  6
            //   c640010a             | mov                 byte ptr [eax + 1], 0xa
            //   015e08               | add                 dword ptr [esi + 8], ebx
            //   85ff                 | test                edi, edi

        $sequence_9 = { 8a01 41 84c0 75f9 2bca 83f97f }
            // n = 6, score = 300
            //   8a01                 | mov                 al, byte ptr [ecx]
            //   41                   | inc                 ecx
            //   84c0                 | test                al, al
            //   75f9                 | jne                 0xfffffffb
            //   2bca                 | sub                 ecx, edx
            //   83f97f               | cmp                 ecx, 0x7f

    condition:
        7 of them and filesize < 786432
}